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石和田 彰
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ii-ix
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清水 俊秀
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x-xiv
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重久 卓夫
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xv-xx
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大坪 研一
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xxi-xxii
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上山 由貴, 中島 常憲, 高梨 啓和, 大木 章
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セッションID: No.1
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For three kinds of high-sulfur coals, the biodesulfurization by use of Thiobacillus ferrooxidans was conducted, and the removal of inorganic sulfur as well as that of hazardous trace elements were examined. For As and Se, the removal of trace elements had a correlation with that of inorganic sulfur. However, for Hg, such a correlation was not observed. A subsequent extraction method was performed to clarify the mode of occurrence of trace elements in coal. The removal behavior for trace elements, when the biodesulfurization is carried out, is discussed in terms of the mode of occurrence of these elements.
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上戸 龍, 山田 健太, 中島 常憲, 高梨 啓和, 大木 章
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セッションID: No.2
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Se(VI) was hard to remove from the aqueous media by using the conventional removal method, such as adsorption. Therefore, the removal of Se(VI) from the simulated wet FGD waters by use of bioreduction and TiO_2 photocatalytic reduction were investigated. When the bioreduction and photocatalytic reduction systems were attempted for a simple 0.5 mg/L Se(VI) solution, the reduction of Se(VI) to Se(0) precipitate actually occurrs and Se(VI) was effectively removed from aqueous media. However, the removal efficiency of Se(VI) was considerably inhibited by some co-existing anions, such as NO_3^- or SO_4^<2-> when these reduction methods were applied for the simulated FGD waters.
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神原 信志, 塚本 茂貴, 守富 寛, 小嶋 久夫, 牧野 英一郎
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セッションID: No.3
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The most popular method for mercury removal is powdered activated carbon injection (PAC) into flue gases. However, it is recognized that the PAC has some drawbacks such as high cost, narrow working temperature window, and releasing mercury into soil. The objective of this study is to investigate the method convert mercury into water-solubility by ozone injection, and removal it by wet scrubber. Simultaneously, removal of NO was examined. Above 95% Hg^0 and NO removal was attained by the method.
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加藤 貴宏, 梅田 雄大, 村上 賢治, 菅原 勝康
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セッションID: No.4
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In order to develop the efficient recovery process of zinc from a steel dust generated from steel making industry, the release behavior of zinc from steel dust by using carbon and change in chemical form of zinc compounds were followed. The effects of the type of sample and carbon source on the release behavior of zinc during heat treatment were examined. Kinetic analysis was carried out for the zinc - form change during carbon reduction. The release behavior of zinc was successfully simulated by the determined kinetic parameters.
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大森 基平, 光原 乃里子, 松下 洋介, 原田 達朗
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セッションID: No.5
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Fundamental drying behavior of Brown coal with high moisture content is investigated under various temperature and humidity conditions. As-received Loy Yang coal is dried by temperature humidity chamber and its drying rate is formulated with simple equation. As a result, drying rate can be expressed with drying fraction X and drying rate constant with respect to temperature and relative humidity.
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藤墳 大裕, 蘆田 隆一, 三浦 孝一
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セッションID: No.6
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Efficient utilization methods of low rank coals must realize not only dewatering and upgrading but suppressing self-ignition tendency of low rank coals. The authors have recently proposed a novel method to dewater and to upgrade low rank coals. The method treats coals in non-polar solvent, such as 1-methylnaphthalene (1-MN), at temperatures below 350℃. In this study, the possibility of this solvent treatment was examined as a method to suppress self-ignition tendency of low rank coals as well as to dewater and to upgrade them. It was found that the samples obtained from an Australian brown coal by the treatment in either 1-MN or subcritical water were almost free from water, and their heating values were higher than the heating value of the original coal. The values ware as high as 30 MJ/kg on the treated coal basis which corresponded to the heating values of subbituminous or bituminous coals. The self-ignition tendencies of the solvent treated coal and the water treated coal were slightly higher or almost same as the self-ignition tendency of the raw coal. These treated coals were separated into the extracted fraction and the residue at the treatment temperature to investigate the change induced by the solvent treatment in more detail. It was found that the self-ignition tendencies of the extracted fractions were significantly suppressed, whereas the self-ignition tendencies of the residues were higher than that of the original coals. This self-ignition suppression of the extracted fraction was mainly realized by their thermoplastic property, which reduces their pore surface area and minimizes gaseous oxygen access. This result suggests that these extracted fractions can be used as an additive to suppress self-ignition tendency.
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堺 康爾, 宍戸 貴洋, 奥山 憲幸, 濱口 眞基, 菊池 直樹
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セッションID: No.7
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Hyper-coal (HPC) is produced by coal extracted and separating insoluble component (residue-Coal; RC) from soluble component. HPC has an excellent thermoplastic property and a large potential for coke additive to make a strong coke. The thermoplasticity of Hyper-coal depends on the separation efficiency in the solid-liquid separation processes. The process adapts the gravity settling velocity to separate RC from liquid. Therefore the settling velocity of RC is the most important factor to design the separation process for the plant. On the other hand, the actual settling velocity is not cleared in the high temperature and high pressure conditions. In this research, we measured the actual RC settling velocity in the high temperature and high pressure conditions on batch settling tank. That enables to design the separation process as designing thickener.
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並木 美耶子, 篠田 賢, 岡本 和明, 菅野 元行, 角田 雄亮, 平野 勝巳, 藤本 英和, 勝見 靖弘
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セッションID: No.8
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On the coking process of caking coal, excess addition of non- or slightly- caking coal decreased the caking properties of coal because the oxygen-containing functional groups in non- or slightly- caking coal caught hydrogen in caking coal. The authors have reported that fluidity of three kinds of non- or slightly- caking coals increased by addition of either hydrogenated coal tar pitch (CP) or hydrogenated fluoranthene. In this study, after hydrogenation of three kinds of the CP related model compounds (pyrene, phenanthrene, perylene), additive effects of the hydroaromatic compounds upon enhancement of caking properties of non- of slightly- caking coal were discussed.
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崎元 尚土, 鷹觜 利公, 原田 靖之, 藤本 英和
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セッションID: No.9
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Effect of nitrogen-containing compounds in HPC prepared from low rank coal on coking properties of coal blends was studied by using 4 chemical regents (tricyclic and tetracyclic compounds and their nitrogen-containing ones). Thermogravimetric analysis, viscoelasticity, and tensile strength measurements for a standard coal blend with 3% each model compound were carried out. These results show that nitrogen-containing tetracyclic compound decreases the viscoelasticity and increases the tensile strength.
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岡 高憲, 田中 丈晴, 佐藤 和好, 宝田 恭之
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セッションID: No.10
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In this report, the characteristics of converter slag as a coke additive for steel making coke was studied. The addition of converter slag before carbonization promoted CO_2 gasification of coke but reduced drum index (DI). Ca_2Fe_2O_5 in converter slag worked effectively as gasification catalyst. It was confirmed that the solution-loss reaction on the catalyst-supported graphite followed the redox reaction model.
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北尾 政人, 西端 裕子, 大田 晃平, 西村 勝
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セッションID: No.11
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It is well known that the excessive formation of pyrolytic carbon on coke oven walls causes some troubles such as increase of pushing force and damage to the oven walls. The effect of the volatile mater, pyrolysis gas components of coal and the temperature of the wall on carbon deposition rate was quantitatively examined. By using this empirical formula, the correlation of calculated carbon deposition rate and change of pushing force was confirmed.
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パタル アパル, 王 青躍, 陳 啓宇, 前園 拓矢, 新井田 大貴
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セッションID: No.12
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From the viewpoint of global warming and recovery resources and energy from organic wastes, the carbonizing process is paid the attention to intermediate their processing of the organic solid wastes. This study is focused on carbonization of woody waste and carbide using to solid fuel utilization. Therefore, woody waste biomass was loading to alkali metal such as NaOH, using the thermogravimetry with a differential thermal analyzer (TG-DTA), the reactivity assessment on carbide was carried out based on the combustion experiments. The results show combustion characteristic of char increased by NaOH load valve, however when Na^+ loaded more than 2%, it seemed to be loss in its reactivity of char.
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佐藤 和好, 末宗 将, 新田 紘平, 小川 由起子, 宝田 恭之, 猪熊 栞, 殿岡 彩織, 間々田 有美, 中村 絵里奈
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セッションID: No.13
発行日: 2011/10/27
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Here, we demonstrate the fabrication of activated carbon (AC) from chicken manure and its application for electric double layer capacitor (EDLC) electrodes. Egg-laying chicken derived manure was used as the starting material. Char was fabricated through thermal decomposition of the as-received manure in platinum crucible between 600 and 1000 ℃ for 7 min. Ash was removed from the char through washing with 6 M HCl and following repeated rinsing with distilled water. Finally, AC was obtained after the drying of the ash removed char at 107 ℃ for 24 h. Specific surface area (SSA) of ACs was measured by N_2 gas adsorption with BET method. EDLC electrode pellets were fabricated through uniaxial pressing of AC, acetylene black and PTFE mixture with an appropriate composition. SSA increased with increasing the heating temperature and reached to be 1618 m^2・g^<-1> at 1000℃. Relatively high specific capacitance of 25 F・g^<-1> was obtained for the EDLC.
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佐藤 仁彦, 村上 賢治, 菅原 勝康, 坪内 直人, 大塚 康夫
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セッションID: No.14
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Steam gasification of a low rank coal with Ca catalysts prepared from CaCO_3 in water has been studied with a fixed-bed, quartz reactor. When the coal with about 0.6 wt % Ca is first pyrolyzed and then gasfied for 1 h in 50 vol. % H_2O/He, char conversions at 750 and 800 ℃ reach approximately 70 and 90 wt % (dacf), which are 2 and 1.5 times those without the Ca, respectively. The catalyst shows the high activity comparable to that of the Ca ion-exchanged using an aqueous solution of Ca(OH)_2. The TPD and XRD measurements reveal that CaCO_3 added is initially present in the ion-exchanged forms and then finely-dispersed in the pyrolyzed char. These results demonstrate that CaCO_3 is effective as catalyst raw material in steam gasification of low rank coal.
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梅本 賢, 梶谷 史朗, 原 三郎
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セッションID: No.15
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In coal gasification, two carbon solids are generated. At first, volatile matter and solid char are generated through coal pyrolysis. After that, volatile matter decomposes and partially precipitates as solid soot or coke. The soot produced through coal pyrolysis in inert gas has lower gasification reactivity than char. It is necessary to clarify the soot production and reaction behavior in coal gasification condition, aiming at the improvement of the carbon conversion in coal gasifying process. However, there had been no proper deliberation of soot quantitative method because the char and the soot are mixed together and are difficult to separate. CRIEPI has proposed a new handy and reliable soot quantitative method using a laser diffraction particle size analyzer. In this study, using pressurized drop tube furnace (PDTF), coal gasification experiment was performed. As a result, in CO_2 gasification condition, the yield of soot with low gasification reactivity did not decrease while char yield decreased as CO_2 concentration increased. Furthermore, in O_2 gasification condition, the soot yield decreased greatly because the volatile matter reacted with O_2.
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羽鳥 哲矢, 森下 佳代子, 五十嵐 啓介, 吉田 裕志
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セッションID: No.16
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Brown coal has many oxygen-containing functional groups such as carboxyl groups and it is ion-exchangeable with metal species. The experimental was carried out by following 3 steps: (1) Cu was separated from Fe included in waste etching liquid adding NH_3. (2) Cu was recovered by ion-exchange with brown coal. (3) The residue after ion exchange was used instead of NH_3 to separate Cu and Fe.
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星野 明宏, 園山 希, 山下 亨
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セッションID: No.17
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Low HGI coal and high HGI coal were blended, and their pulverization behaviors were investigated with HGI testing mill. The objectives of this study are to predict pulverization behaviors such as mill power, the size distribution of pulverized coal at mill outlet and so forth based on the aspects of each individual coal. When low HGI coal and high HGI coal were blended at equal rate, the pulverization behaviors of the blended coal were more greatly influenced by low HGI coal.
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朴 海洋, 秋山 勝哉, 田窪 陽司, 多田 俊哉, 植木 保昭, 義家 亮, 成瀬 一郎
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セッションID: No.18
発行日: 2011/10/27
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The main purpose of this study is to develop the combustion technology for low-rank coals with low melting point of ash. Various kinds of coals with different melting temperatures and ash compositions were used as the samples for the chemical equilibrium calculations and the pilot-scale combustion experiment. It was confirmed that the deposition fraction of ash obtained by the experiment rapidly increased when the molten slag fraction obtained by the calculation became over 60%. Finally, the combustion tests of the blended coal of low rank coal with bituminous coal were conducted using a 145 MW pulverized coal-fired boiler. The blending mass ratio of low rank coal to bituminous coal was decided, using the coal blending method developed. As a result, the mass of the deposited ash for the blended coal did not greatly increase and no slagging problems occurred for 11 days of boiler operation.
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野澤 創平, 松下 洋介, 二宮 善彦
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セッションID: No.19
発行日: 2011/10/27
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To estimate the properties about chemical reaction rate, the Drop Tube Furnace (DTF) is generally used as an experimental apparatus. In this study, the heat and mass transfer around a single pulverized coal particle that is heated in the flow field reproducing the DTF is numerically simulated as the solid-gas two-phase flow. By comparisons of numerically analyzed results, the influence of the different coal in rank, coal particle diameter, gas temperature distribution and velocity distribution in the DTF for the thermal behavior of the pulverized coal particle are discussed.
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麓 恵里, 佐藤 信也, 鷹觜 利公
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セッションID: No.20
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Desulfurization of petroleum residual oil using steam was examined with a complex metal oxide catalyst including iron, zirconium, and aluminum. Heavy oil was decomposed with the catalyst and the sulfur content in oil decreased. Hydrogen sulfide was generated after the reaction with steam, while the amount of hydrogen sulfide was negligible small in the reaction without steam. These results suggest that sulfur compounds in residual oil might have reacted with hydrogen species derived from steam when oxygen species derived from steam were added to iron oxide lattice and reacted with heavy oil.
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森本 正人, 杉本 義一, 佐藤 信也, 鷹觜 利公
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セッションID: No.21
発行日: 2011/10/27
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Canadian oil sand bitumen was treated at 440℃ and pressures of 10, 25, and 30 MPs using a continuous stirred-tank reactor to examine its coking behavior in supercritical water flow. The coke yields at those conditions were 11.3, 12.4, and 9.7 wt%, respectively. At 30 MPa, the conversion was the highest, the coke showed the highest aromaticity, and the liquid product was the richest in heavier component suggesting that at this pressure the coking of bitumen processed in the most highly dispersed state.
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石原 篤, 中嶋 洸平, 平戸 元基, 橋本 忠範, 那須 弘行
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セッションID: No.22
発行日: 2011/10/27
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The gel skeletal reinforcement to prepare mesopore with large pore diameter and pore volume was developed by the reaction of silica aerogel with TEOS. The pore diameter and pore volume of silica calcined at 600℃ reached 30nm and 3.1 cm^3/g, respectively, in the N_2 adsorption measurement by the BJH method, indicating that most of pores for this silica consisted of mesopores. Silica-aluminas with the same pore size distribution were also prepared using ASB. The catalytic performance for catalytic cracking of n-dodecane was investigated at 500℃. The mixed catalyst derived from beta-zeolite and silica-alumina with large mesopore exhibited not only the comparable activity to that for single use zeolite but also the linear relationship between the formation of branched products and the pore size.
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佐藤 信也, 鷹觜 利公
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セッションID: No.23
発行日: 2011/10/27
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For the convenient use of an average molecular structural analysis, the prediction formulae for the carbon aromaticities of asphaltenes, and a database for the molecular modeling were established. These techniques largely save the analysis time.
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ミースシリミリン , 曹 景沛, 佐藤 和好, 小川 由起子, 宝田 恭之
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セッションID: No.24
発行日: 2011/10/27
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The catalytic hydropyrolysis of rice husk was carried out in a fluidized bed reactor to investigate the effect of catalyst and hydropyrolysis temperature on product yields and composition of bio-oils. The results found that hydropyrolysis using Ni/LY reduced the oxygen content of bio-oil from 32.81% without catalyst to 27.5% with catalyst and even more decrease with hydropyrolysis temperature rose up to 650℃. The oxygen content of bio-oils was markedly reduced due to the consumption of oxygen to form H_2O, CO and CO_2 in catalytic hydropyrolysis. The HHV of bio-oils remarkable increased with increasing temperature contained more aromatic hydrocarbons with slightly lower oxygenated compounds which can be used as a liquid fuel and chemical feedstock.
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曹 景沛, 佐藤 和好, ミースシリミリン , 小川 由起子, 宝田 恭之
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セッションID: No.25
発行日: 2011/10/27
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Fast pyrolysis of sewage sludge (SS), pig compost (PC), and wood chip (WC) were investigated in a drop tube furnace and an internally circulating fluidized-bed to evaluate bio-oil production. Characterization of bio-oils show that the bio-oil from SS is rich in aliphatic and organonitrogen species, while the bio-oil from PC exhibits high caloric value due to its higher carbon content and lower exygen content. The bio-oils from SS and PC have similar chemical composition of organonitrogen species. The bio-oil from WC is unfeasible for use as fuel feedstock as most of the compounds detected are organooxygen species.
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服部 航希, 守富 寛, 隈部 和弘, 神原 信志
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セッションID: No.26
発行日: 2011/10/27
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Energy resource must be shifted from fossil fuels to new renewable energy resources because of reducing CO_2 with global warming issue and reducing nuclear power promotion. However, the shift would not suddenly occur but take a long time. Therefore, to satisfy the present energy demand, the utilization technologies for fossil fuel such as oil, natural gas and coal must furthermore focus on the clean coal technology with high efficiency power generation. Also the high efficient power generation technologies for using biomass energy must be developed. Then, we focus on Direct Carbon Fuel Cell (DCFC), which can be applied to various carbonaceous resources (biomass, coal, petroleum coke, organic waste) and have an advantage as a cogeneration process. The general reaction scheme of DCFC is C+O_2 → CO_2, theoretical conversion efficiency is approximately a 100%. In this study, we observed the power generation characteristic of DCFC for the difference of carbonaceous fuels carbonized in various conditions from biomass resources.
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遠田 幸生, 竹村 卓也, 沓名 潤子, 佐藤 和美, 高橋 武彦, 伊藤 一志, 伊藤 新, 小林 淳一, 郷地 元博
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セッションID: No.27
発行日: 2011/10/27
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As a preprocessing technology of the bio-ethanol, a high-impact pulverizing mill was developed. The characteristic of the mill is to be able to product the biomass powder of the high saccharification efficiency. The simultaneous saccharification and fermentation examination was tried for the purpose of the high efficiency of the bioethanol production process. As a result, it is clarified that high ethanol concentration was able to be produced in a short time.
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王 青躍, 新井田 大貴, アパルパタル , 陳 啓宇, 前園 拓矢, 関口 和彦
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セッションID: No.28
発行日: 2011/10/27
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Present, the oil agglomeration has attracted attention in the way of making efficient use of waste fine coal from the coal cleaning. In this study, we analyzed efficiency of coal cleaning based on oil agglomeration with three coals varied oxygen contents and as the aggregating agents, kerosene and vegetable oil were used. In order to investigate the precise effect of coals themself and polar functional groups, the ash contents in sample coals were digested by HCl and HF solutions. As the results, in cases where we changed the combination of coals and oils, the recoveries of coals were changeable.
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Xian LI, Janewit WANNAPEERA, Nakorn WORASUWANNARAK, 蘆田 隆一, 三浦 孝一
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セッションID: No.29
発行日: 2011/10/27
公開日: 2017/03/22
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We have recently presented a novel method that not only dewaters but upgrades low rank coals. The method treats coal in non-polar solvent, such as 1-methylnaphthalene, at temperatures below 350℃, and separates the coal into extract, residue, and gaseous product consisting of CO_2 and a negligible amount of hydrocarbon gases at the treatment temperature. The extract is further separated into solvent-soluble fraction, Soluble, and solvent-insoluble fraction, Deposit, at room temperature. In this work twelve low-grade carbonaceous materials including a peat, various kinds of biomasses as well as low rank coals were upgraded and fractionated by this method. The results showed that the moisture in all the raw materials was completely removed without phase change. The raw materials were mainly separated into three solid fractions (Residue, Deposit and Soluble) without heating value loss for all the raw materials. The Solubles and Deposits were almost ash-free, and were respectively rather close to each other in chemical and physical properties regardless of the parent materials. Thus, it was shown that the proposed degradative solvent extraction method can effectively convert a wide range of low grade carbonaceous resources into solid fuels and low-molecular-weight compounds having rather similar chemical and physical properties.
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牧野 英一郎, 野口 隆行, 木村 敏之, 神原 信志
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セッションID: No.30
発行日: 2011/10/27
公開日: 2017/03/22
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Low Rank Coal (LRC) such as Lignite and Sub-bituminous coal is the main fuel for power generation in Indonesia, because LRC is huge abundant resources in Indonesia and its price is lower than bituminous coal. Meanwhoil, CO2 emission volume per kWh of LRC is higher than bituminous coal. Pre-drying of LRC by integration Steam Tube Dryer (STD), indirect steam heating dryer, and steam system of power plant allows coal power plant to reduce LRC consumption and CO2 emission.
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田中 亮太, 則永 行庸, 工藤 真二, 林 潤一郎, 渡邊 裕章, Vinod M. Janardhanan
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セッションID: No.31
発行日: 2011/10/27
公開日: 2017/03/22
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Toward a better understanding of chemistry and kinetics of coke oven gas (COG) reforming by non-catalytic partial oxidation, we have been conducted modeling and simulative studies on this phenomenon by utilizing a predictive kinetic model which consists of thousands of elementary reactions coupled with a simple plug flow reactor model. In this study, we introduce new parameters which account for ignition behaviors of COG and heat loss from outer wall of the reformer for describing the reacting flow more precisely. Introduction and optimization of these parameters enabled us to reproduce the temperature profiles in the reformer successfully.
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下平 和佳子, 今田 典幸, 吉川 博文
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セッションID: No.32
発行日: 2011/10/27
公開日: 2017/03/22
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Boron (B) and selenium (Se) in effluent of wet flue gas desulfurization (WFGD) should be controlled to meet the regulation. Therefore to obtain fundamental data for optimization of coal-fired flue gas treatment system, behavior of B and Se was investigated throughout a pilot-scale test plant, which consisted of a furnace (1.5MWth), a selective catalytic reduction (SCR) reactor, a gas-gas heat-exchanger (GGH), a dry electrostatic precipitator (DESP) and a WFGD system. About 90% of B was captured by ash between the furnace and the SCR inlet (380℃), and the capture did not increase with decreasing gas temperature downstream of the SCR. On the other hand, Se was mostly in gaseous form at the SCR inlet, and Se capture by ash increased with decreasing temperature downstream of the SCR. Then Lowering gas temperature from 160 to 90℃ at GGH improved removal of Se across DESP and could reduce inflow of Se to WFGD.
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松井 貴, 土肥 勇介, 山本 哲也, 角 広行, 深田 喜代志
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セッションID: No.33
発行日: 2011/10/27
公開日: 2017/03/22
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The dilatation of coal under homogenous heating by microwave heater was investigated. The experimental apparatus consisted of the microwave heater and the detector of coal dilatation. Sample coal was heated at the rate of 3K/min up to 550℃ and the change of coal height was measured by laser range meter. The difference between preset temperature and coal temperature was within 5℃, so it was confirmed that the power control of microwave was no problem. The dilatation measured by this method differed from TD measured by dilatometer. Especially, the dilatation of high fluidity coal was given lower dilatation than that estimated from TD value.
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岡田 清史, 上田 成, 小野崎 正樹, 野相 詠史, 宮脇 仁, 荒牧 寿弘, 尹 聖昊, 持田 勲
原稿種別: 本文
セッションID: No.34
発行日: 2011/10/27
公開日: 2017/03/22
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Artificial super coal (ASC) was named from its high coking abilities coming out through hydrogenative thermal processing of low rank coals at a moderate temperature and a mild pressure using hydrogenated heavy solvent. ASCs were prepared from a Chinese subbituminous coal with a high inertinite maceral composition, and from an Indonesian subbituminous coal with a poor inertinite maceral composition. Morphological changes of ASCs derived from the low rank coals, and cokes derived from the ASCs were studied under an optical microscope. ASCs were composed of hydrogenated pitch matrix and fine particles densely dispersed in the matrix. In the cokes derived from ASCs, optically anisotropic textures were recognized under the microscope.
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坪内 直人, 上坊 和弥, 小野 洋平
原稿種別: 本文
セッションID: No.35
発行日: 2011/10/27
公開日: 2017/03/22
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The evolution of HCN, NH_3 and H_2S during carbonization of seven coking coals has mainly been studied with a flow-type fixed bed quartz reactor to examine the effects of nitrogen and sulfur on coal fluidity. The formation of HCN or NH_3 from these coals starts at about 400℃, and each concentration profile observed provides the main and shoulder peaks around 450 and 670℃, respectively. On the other hand, H_2S evolution occurs mainly around 450 and 550℃. Each coal used also gives a maximum value in fluidity (MF) aroound 450℃. There is an almost linear correlation between MF value and total amount of HCN, NH_3 or H_2S released up to 450℃.
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島田 雄太, 守富 寛, 渡辺 明, 中村 知佳, 西村 賢大, 隈部 和弘
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セッションID: No.36
発行日: 2011/10/27
公開日: 2017/03/22
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Carbon fiber composite is extensively applied to cars and planes because of the light weight high strength. As a result, large quantities of wasted CFRP will be exhausted in the future and so development of recycle system will be needed. In this study, two staged process combined with carbonization and calcination has been investigated to take up carbon fiber from CFRP. Based on the material and energy balance by using a laboratory-scale equipment, the possibility of the two stage-process will be reported. Additionally, the strength of the carbon fiber recovered from the equipment will be introduced.
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林 裕介, 愛澤 禎典, 上坊 和弥
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セッションID: No.37
発行日: 2011/10/27
公開日: 2017/03/22
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Relationship between the change of coke pore structures and asphalt pitch addition (ASP) was measured by image analyzing of coke cross section. Coke pore circularity was increased by addition of 10% ASP, which corresponded with the change of DI^<150>_<0.5-6>. When ASP was added excessively to blended coal, large pore increased, while average pore wall thickness increased. The large pore was observed around ASP high concentration part, rather than inside the part. It suggests the excess gas from ASP diffused to surroundings and there it combined.
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奥山 憲幸, 宍戸 貴洋, 堺 康爾, 濱口 眞基, 菊池 直樹
原稿種別: 本文
セッションID: No.38
発行日: 2011/10/27
公開日: 2017/03/22
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This study is concerned with the caking effects of HPC (High Performance Caking additive), which is produced by thermal extraction and solvent de-ashing in the coal derived methylnaphthalene solvent. Significant improvement in the thermoplasticity of coal blends are observed by HPC addition. Synchronized with it, strong improvement in dilatation is also brought especially with high blending ratio of slightly caking coals. It is confirmed that the improvement of dilatation is the dominant factor to perform filling the inter particle voids of coals in the coking reaction, that brings strong adhesive of coal particles to form a lump strong coke for blast furnace. In the same meaning, the increasing in the charging bulk density of coal affects to decrease in the inter particle voids. The changing in the coke strength is quantitatively investigated as the synergic effect of those factors.
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熊谷 治夫, 奥山 憲幸, 宍戸 貴洋, 堺 康爾, 濱口 眞基, 小松 信行
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セッションID: No.39
発行日: 2011/10/27
公開日: 2017/03/22
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This study aim to investigate the effects of HPC addition on the thermoplasticity of coal blends. The thermolasticity of coal blends with HPC were monitored with in-situ high temperature ^1H-NMR relaxation measurement. The solid echo pulse sequence was employed to generate ^1H-NMR transverse relaxation signals. The echo signals obtained during heat treatment under a flow of nitrogen at a heating rate of 3K/min were deconvoluted into a set of one Gaussian and two Exponential decay components which represent the immobile, intermediate and mobile component, respectively. The changes in the fractional intensity of mobile component, fHm, calculated from the signals well corresponded to the softening and resolidification phenomena of coal blends. The fHm and molecular mobility of mobile component represented by Spin-Spin relaxation time, T2Hm, increased with HPC addition at lower temperature range. At higher temperature range, that is thermoplastic temperature range, fHm and T2Hm shows almost the same value as those for original coal blends. These results indicate that the HPC can be added as a substitution for coking coals.
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宍戸 貴洋, 奥山 憲幸, 堺 康爾, 濱口 眞基, 菊池 直樹
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セッションID: No.40
発行日: 2011/10/27
公開日: 2017/03/22
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We have been developing a coal derived caking additive to make a strong coke for blast furnace. It is a coal extract, dissolved in a methylnaphthalene-based solvent at 360-400℃, named "High-Performance Caking additive, HPC". HPC has an excellent thermal plasticity and a dilatability. On the other hand, similar amount of insoluble coal, 'RC' is produced in this process. RC appeals no thermal plasticity, and has a high concentration of ash. However, it seems to play as a filter to form a substitution for a strong caking coal by suitable mixing with HPC in the process. Caking properties of the mixtures were examined to evaluate a suitable mixing condition of RC. It was resulted that around 30% of RC concentration was the most effective to use as the substitution for caking coal. Viewed in this point, 80% of the feed stock, steaming coal, can be utilized as a caking coal.
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鷹觜 利公, 崎元 尚土, 佐藤 豪人, 奥山 憲幸, 宍戸 貴洋
原稿種別: 本文
セッションID: No.41
発行日: 2011/10/27
公開日: 2017/03/22
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Coke strength is one of the most important factors for determining coke quality. A technology to manufacture good-quality coke from coal blends containing low-quality slightly caking or non-caking coals is strongly required. Technological developments to evaluate the coke strength easily are needed. A new image analysis for evaluation of coke strength was proposed. Coke-matrix connectivity was suggested as one of the determining factors of coke strength. Details of this new image analysis are presented.
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