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Article type: Cover
Pages
Cover1-
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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Article type: Appendix
Pages
A1-A2
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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Article type: Appendix
Pages
A3-
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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Article type: Appendix
Pages
A4-A12
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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Article type: Index
Pages
Toc1-
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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Satoshi TANDA
Article type: Article
Pages
ii-iii
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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We create a new scope and an innovative field of study from the perspective of topology, a universal concept that is applicable across a wide range of fields. Incorporating mathematical science, applied physics, instrumentation and information technology, materials science, life science, economics, and energy systems, we aim to build a new science of excellence for original and interdisciplinary research and education, both basic and applied.
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Yuhan Sun
Article type: Article
Pages
iv-v
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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CO_2 is a cheap, nontoxic and abundant Cl feedstock, and its chemical utilization is a challenge and important topic. Thus, any efficient reactions using CO_2 as a reagent have positive ramifications on efforts towards carbon management. However, CO_2 is a thermodynamically stable compound, and then its reduction requires high energy substances or electroreductive processes. The potential of homogeneous catalysis for CO_2 fixation has been discussed in recent reviews. Heterogeneous catalysis can offer several technical advantages such as stability, separation, handling and reuse of the catalyst and reactor design. Despite CO_2 activation by heterogeneous catalytic routes were still limited, efforts have been made towards the synthesis of cyclic carbonates, and synthetic gas (CO, H_2) as well as methanol synthesis from CO_2 hydrogenation. This brief review is therefore intended to provide an overview of the research progress on those topics.
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Masaaki Ebina
Article type: Article
Pages
vi-vii
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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Toshinori KOJIMA
Article type: Article
Pages
viii-ix
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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Biomass energy is recently noticed from various points of view. But the most urgent point should be Climate Change and then the most important issue would be future energy system. In the present report, their future scope from the global view point is discussed with afforestation for carbon fixation.
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Masaru ICHIKAWA
Article type: Article
Pages
x-xi
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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Atsushi Tsutsumi
Article type: Article
Pages
xii-xiii
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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The novel principle of energy efficient utilization for innovative energy saving is demonstrated in terms of exergy recuperation. Compared with the conventional energy saving technology of energy cascading utilization, the exergy recuperation in which low-level thermal energy is recuperated and recycled can reduce the energy consumption drastically.
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Toshihiko Matsuto
Article type: Article
Pages
xiv-xv
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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Ken-ichiro Sugiyama
Article type: Article
Pages
xvi-xvii
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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Article type: Appendix
Pages
1-
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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Osami YOKOTA, Akinori HAYASHI, Hirokazu TAKAHASHI
Article type: Article
Session ID: 1-1-1
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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In the batch type equipment, the results of the reforming examination for crude oil were indicated. Experimental conditions are "pressure 25MPa temperature 400 degrees Celsius and water-oil ratio 0-4". Concentrations of Asphaltene and Coke were investigated under the experimental conditions.
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Shogo Teratani, Masaki Ota, Masaru Watanabe, Yoshiyuki Sato, Hiroshi I ...
Article type: Article
Session ID: 1-1-2
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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Vapor-liquid equilibria (VLE) and liquid-liquid equilibria (LLE) for water-decane and water-squalane (C_<30>H_<62>) binary mixtures were correlated by Peng-Robinson Equation of State (PR EoS) at temperatures ranging from 573 to 637 K and pressures ranging from 1.3 to 31.2 MPa. The boiling point and critical constants of squalane were estimated from the specific gravity and molecular weight by using Nji method whose applicability to heavy hydrocarbon had been approved by comparing the prediction accuracy for the literature critical constants of paraffins, naphthenes and aromatics. Introduction of two temperature dependent binary parameters into mixing rules was revealed to provide good correlations and it was also suggested that the temperature dependence of volume binary parameter was omissible to reduce the number of parameters in calculations.
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Shin-nosuke KATO, Satoshi ISHIZEKI, Masaru WATANABE, Richard L. SMITH ...
Article type: Article
Session ID: 1-1-3
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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Supercritical water is an attractive solvent for upgrading bitumen, because it is thought to prevent the formation of coke precursors. In this study, we carried out batch experiments of bitumen pyrolysis in the presence and absence of water at 723 K for reaction times up to 30 min. With increasing of water density, both the rates of asphaltene conversion and coke formation were promoted, however the yields of coke at 30 min of the reaction time were almost the same regardless of whether water was present or not. A phenomenological model was applied and shows the possibility that supercritical water inhibited formation of coke and its precursor, and lowered the total amount of coke.
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Masato MORIMOTO, Shinya SATO, Toshimasa TAKANOHASHI
Article type: Article
Session ID: 1-2-1
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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Condition of supercritical water (SCW) that showed the highest miscibility with oil sand bitumen was examined using dielectric constant (ε) and Hansen solubility parameter (HSP). The required conditions of SCW were considered to be 2.2 ≦ ε ≦ 10.4 and HSP for hydrogen bonding, δ_h < 10.0 MPa^<0.5>. To confirm this estimation, an asphaltene which was a n-heptane insoluble fraction contained in a Canadian bitumen was treated in a flow of SCW at a temperature of 440℃ and pressures ranging from 20 to 35 MPa. The highest extraction yield of 85 wt% was given at 30.0 MPa which ε and δ_h of SCW were 2.23 and 9.8 MPa^<0.5>, respectively. This indicated the theoretical estimation was valid.
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Eri FUMOTO, Akimitsu MATSUMURA, Shinya SATO, Toshimasa TAKANOHASHI
Article type: Article
Session ID: 1-2-2
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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To represent the catalytic cracking of heavy oil with steam over a zirconia-alumina-iron oxide catalyst, a kinetic model was proposed. The model includes four lumps: heavy oil (boiling point above 350℃), gas oil (boiling points of 250-350℃), gasoline + kerosene (boiling point less than 250℃), and gas. In this reaction, heavy oil fractions reacted with the lattice oxygen in the iron oxide. Active oxygen species generated from steam were incorporated into the iron oxide lattice, and these species reacted with heavy oil fractions. As a result, lighter fractions and carbon dioxide were mainly produced with almost no coke. Kinetic parameters were determined by nonlinear least-square regression of the experimental results. The predicted product distributions were found to be in good agreement with the experimental data.
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Akihiro SAKAJO, Ryuichi ASHIDA, Kouichi MIURA
Article type: Article
Session ID: 1-2-3
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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To upgrade heavy oil efficiently, it is important to suppress excessive polymerization and decomposition of light oil produced by the decomposition of heavy oil. In this work an oil sand bitumen was pyrolyzed in a flowing stream of nitrogen to carry away light oil produced instantly by the nitrogen. This pyrolysis method increased the yield of light oil significantly by minimizing the formation of light hydrocarbon gas and coke.
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Yusuke WATANABE, Yusuke KAKUTA, Motoyuki SUGANO, Katsumi HIRANO
Article type: Article
Session ID: 1-2-4
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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The hydrogenolysis characteristics to produce light fuel oil from unused heavy hydrocarbon resources were studied. As a result, it was suggested that an increase in the hydrogen partial pressure promotes the hydrogenation of Resin and Asphalten, and yields light fuel oil including Saturates and Aromatics effectively.
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Yoshinori Ota, Tomomi Oishi
Article type: Article
Session ID: 1-2-5
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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In order to realize the efficient integrated production of petroleum and petrochemical products, we are developing a series of technologies in which the naphtha and petrochemical fractions obtained from the condensate are desulfurized simultaneously. By utilizing these technologies, aromatic components and gasoline base used in petroleum refining, as well as the naphtha components used as the raw materials for petrochemical industry will be efficiently separated and provide by the continuous distillation process. This paper reports the approach of petrochemical site.
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Yoshiyuki ABE, Yohei KISHI, Kenji ASAMI, Kaoru FUJIMOTO
Article type: Article
Session ID: 1-3-1
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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Alkylation reaction of isobutane with ethylene was performed over modified beta zeolite catalysts with a semi-batch reaction system at 100℃ and 2.5MPa. Three kinds of metal (Pt, Pd, and Cu) added zeolite catalysts were used in this study. The Copper-added catalyst showed the highest alkylation activity among them. Lower Cu loading and lower SiO2/Al2O3 ratio of beta zeolite were favored for the formation of alkylate products such as C6 and C8 hydrocarbons.
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Sayaka ISHII, Chisato FUKUHARA, Xingdong YUAN, Kaoru FUJIMOTO
Article type: Article
Session ID: 1-3-2
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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Fischer-Tropsch synthesis (FTS) is a reaction for the hydrocarbon production from synthetic gas. Mainly, iron nitrate used as catalyst for the reaction of FTS. But it is cost waste solution in term of treatment. In this study, we use iron sulfate which treat at low cost as catalyst. Carbon supported iron catalyst exhibited better performance than other catalysts.
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Yuta KONO, Xiaohong Li
Article type: Article
Session ID: 1-3-3
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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The product generated by the FT synthesis is most a straight chain hydrocarbon and is not suitable as the gasoline component. Therefore, it aimed to obtain the resolution or the isomerization and the gasoline component. First of all, what behavior the product took by making n-heptane react as a model compound was examined. And, this result was applied to the FT synthesis.
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Fumiaki TANAKA, XINGDONG Yuan, Kaoru FUJIMOTO
Article type: Article
Session ID: 1-3-4
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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Catalytic cracking of hexane on MFI zeolite was studied. Results shows the catalytic activity of MFI zeolite increases as the SiO2/Al2O3 ratio decreased from 400 to 30, but the selectivity of aromatics increases as the SiO2/Al2O3 ratio decreases. Compared with other metal ion modified MFI zeolite, Pt/MFI has the highest activity. Also, the effect of carrier gas has been investigated, CO2 improved promoted the hexane cracking, this may be due to the abstraction of H which come from paraffin on the zeolite surface by CO2.
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Yohsuke Matsushita, Keiko Yoshida, Hideyuki Aoki, Takatoshi Miura
Article type: Article
Session ID: 1-4-1
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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In this study, heat and mass transfer around a single char particle during combustion is numerically analyzed to investigate the effect of the convection of the product due to the combustion on the mass transfer rate of the oxidant based on Finite Volume Method, FVM without any models. As a result, the convection should be considered to estimate the mass transfer rate of the oxidant to the char particle surface accurately, especially with high oxidant and temperature conditions.
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Mamoru KAIHO, Hajime YASUDA, Osamu YAMADA
Article type: Article
Session ID: 1-4-2
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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The method to lead out the reaction formula from the composition of gas produced was established. The formula obtained shows a material balance of gasification. We investigated the reaction process based on this reaction formula.
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Mamoru KAIHO, Osamu YAMADA, Hajime YASUDA, Sohei SHIMADA
Article type: Article
Session ID: 1-4-3
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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AIST has established the method to derive the gasification reaction formula from the result of ultimate analysis and composition of gas produced. The heat of reaction is calculated as a difference of heating value between coal and gas produced in the formula obtained. We estimated the temperature of underground gasification by assuming that the heat of reaction agrees with a total of sensible heat of gas exist in the adiabatic reactor at that temperature.
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Yuu Hanaoka, Takemitu Kikuchi, Yasuo Ohtsuka
Article type: Article
Session ID: 1-5-1
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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Ion exchange reactions of two kinds of low rank coals with natural soda ash, which is composed of > 99% Na_2CO_3, have been studied at 20-40℃, and the atmospheric fixed-bed gasification of Na-exchanged coals with steam has been examined at 700℃. As the exchange temperature increases, the reaction rate increases, regardless of the coal type, whereas the amount of the exchanged Na is larger with a lower rank coal. The Na catalysts are very active in the gasification despite the low loading of a few per cent Na, and char conversions reach 70-100% at 1 h.
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Li-Fang HAO, Xiong-chao LIN, Jin MIYAWAKI, Seong-Ho YOON, Isao MOCHIDA
Article type: Article
Session ID: 1-5-2
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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K_2CO_3 supported perovskites were examined to discover their role of catalysts for effective coal gasification under 800□. Several perovskite type supports with different amounts of Mn were synthesized by both sol-gel and modified reverse homogeneous precipitation methods. Mn effect on the coal gasification was studied. Coal catalytic gasification, its combustion behavior was investigated by thermo-gravimetric analysis. The gasification behavior was checked using self-designed fluidized bed reactor at 773K〜1073K. Catalytic effect of Mn containing perovskite was investigated by varying the metal's contents from x=0.2 to x=1 in LaMn_xCu_<(1-x)>O_3. In addition, the activities of 10wt%K_2CO_3 supported perovskite catalysts were compared with several kinds of 10wt%K_2CO_3 supported Al_2O_3.
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Atul SHARMA, [in Japanese], [in Japanese]
Article type: Article
Session ID: 1-5-3
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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Production of synthesis gas from coal is an attractive process for production of liquid fuels, chemicals and methane by FT synthesis process. A novel single step process to produce synthesis gas from coal at 700℃ was developed. Coal and HyperCoal were gasified in a steam and CO_2 mixed environment as a gasifying agent at 700℃ with K_2CO_3 as a catalyst. Synthesis gas with H_2/CO= 1, 2 and 3 was produced by changing the steam/CO_2 ratio of the gasifying agent. The results showed that synthesis gas suitable for DME, methanol and methane production by FT synthesis process can be produced in a single step at 700℃ by catalytic steam gasification process.
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Shi-Ying LIN
Article type: Article
Session ID: 1-5-4
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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The rates of CaO hydration and Ca(OH)_2 decomposition were measured continuously over 20 hydration/decomposition cycles by means of a high-pressure thermogravimetric apparatus. CaO was completely converted to Ca(OH)_2 in all cycles, and Ca(OH)_2 was decomposed to CaO completely in all cycles.
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Kayoko MORISHITA, Yumi SATO, Takayuki TAKARADA
Article type: Article
Session ID: 1-5-5
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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Brown coal has many oxygen-containing functional groups that act as ion-exchange site for metal species. Metal particles can be produced from gasification or combustion of metal ion-exchanged coal. Ni nano particles were recovered from Ni-exchanged brown coal prepared by using the brown coal which was pretreated in acid solution. The purity of Ni particles was improved by the acid treatment.
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Hiroshi YATABE, Kazunori SATO, Masahiro MATSUOKA, Toshihisa YUDA
Article type: Article
Session ID: 1-6-1
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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The research and development have been performed to study the reforming technology of crude coke oven gas without catalyst using the enthalpy of that gas and injection of oxygen since fiscal 2006. This report shows the test results that were performed using practical crude coke oven gas by the 1/10 scaled pilot equipments in 2008. As the result, the optimum reforming condition was specified and performance target value of the gas amplification ratio over 2.0 and the optimum gas composition were demonstrated.
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Hiroyuki KOZURU, Kouichiro GOTO, Yasuki NAMIKI, Yasushi KAWAMURA
Article type: Article
Session ID: 1-6-2
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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ECOPRO(Efficient coal partial hydropyrolysis process) is a high efficient coal conversion process using the two-staged entrained reactor composed of a reformer and a gasifier. At the 20 tons/day pilotplant study, 13 runs (total time : about 2300hrs) of operation was performed during 2006-2009, and stable operation was achieved with high efficiency.
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Ryuichi ASHIDA, Atsushi NISHIDA, Mitsunori MAKINO, Kouichi MIURA
Article type: Article
Session ID: 1-6-3
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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We propose an effective method to enhance the gasification rate of char prepared from low rank coal without using catalyst. The method we propose is to pre-treat low rank coal in non-polar solvent, such as 1-methylnaphthalene, at temperatures below 350℃. The products obtained from the pre-treatment are solvent-soluble fraction (extract) and insoluble fraction which we call "upgraded coal". It was shown that the gasification reactivity of the char prepared from the upgraded coal was much higher than that of the char from the raw coal, and that the reactivity enhancement was realized without catalytic effect.
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Ryuichi ASHIDA, Yusuke HASEGAWA, Kouichi MIURA, Kenji KATO, Koji SAITO ...
Article type: Article
Session ID: 1-6-4
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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Treatment of brown coal in a non-polar solvent (1-methylnaphthalene) at below 350℃ is proposed as an effective method to fractionate brown coal into several upgraded fractions having different chemical compositions and structures. When an Australian brown coal, Loy Yang (C%=66.7, O%=27.7), was treated for 3 h at 350℃ in a batch extractor, it was converted into three upgraded fractions: the fraction soluble in solvent even at room temperature (Soluble; Yield: Y=0.267, average molecular weight: MW, a≒330, C%=83.0, O%=9.4), the fraction soluble at 350℃ but insoluble at room temperature (Deposit; Y=0.112, MW, a≒500, C%=76.8, O%=17.2), and the solvent insoluble fraction (UC; Y=0.455, MW, a≒800, C%=78.8, O%=16.5). The upgraded coal was rich in aromatic carbons and had the heating value higher than that of the raw coal. These results suggested the effectiveness of the proposed method.
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Hideki Kanda, Hisao Makino
Article type: Article
Session ID: 1-7-1
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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We have developed a prototype energy-efficient coal dewatering plant that can process high-moisture-content coal at normal temperatures. Dimethyl ether (DME), normally a gas, is liquefied and brought into contact with high-moisture-content coal. The water in the coal dissolves perfectly in the liquefied DME, resulting in liquefied DME with a high water content and dewatered coal. The DME is easily recovered by distillation and can be subsequently liquefied by compression, cooling, or a combination thereof. The waste water contained organic component that can be removed with existing waste water treatment technology. The consumed energy of the prototype was lower than the latent heat of water.
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Noriyuki OKUYAMA, Koji SAKAI, Nobuyuki KOMATSU, Haruo KUMAGAI, Toshino ...
Article type: Article
Session ID: 1-7-2
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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Coal extraction behaviors on heating by high-temperature filtrations were investigated using the in-situ high temperature ^1H-NMR. The phase transformation of coal molecule were monitored by classifying to immobile (solid) component, intermediate component and mobile (liquid-like) component by ^1H-NMR relaxation measurement. Coal extraction yield was increased with increase in the extraction temperature, and suddenly decreased at higher temperature than 650 K approximately. That phenomenon was also traced as the formation and deformation of the liquid-like component and influenced by not only quantity but also quality of the component. The remaining amounts of the solid components were far smaller than those of filtration residues. Most of the intermediate component might fill up the gap. The molecular weight distribution of filtration residue was measured using TOFMS. There appealed no large differences even thought the amounts of solid components were different in three kinds of bituminous coals used in this study.
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Nobuhiro MATSUMOTO, Fumiko NOGUCHI, Takuro WATANABE, Kenji KATO
Article type: Article
Session ID: 2-1-1
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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We reported the results of international comparison on quantitative analysis of natural gas components (for example, nitrogen, carbon dioxide, hydrocarbons in methane), which was conducted by International Bureau of Weights and Measures (BIPM) - Consultative Committee for Amount of Substance (CCQM).
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Sohei SHIMADA
Article type: Article
Session ID: 2-1-2
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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Underground Coal Gasification UUCG) is a "dream" energy recovery method from coal seam without underground coal mining and men's labor. Owing to the recent progresses of drilling technology and gas utilization technology, many UCG projects are underway in the world. This paper reports the recent world situations of UCG projects.
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Toshihiro KINOSHITA, Kazuo FUJITA
Article type: Article
Session ID: 2-1-3
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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For Japan as a resource consuming country, it is very important to concentrate on the national energy policy from the viewpoint of reciprocal national security. For Russia as a resource rich country, we focused on our investigation on the strategy of the energy policy in Russia including a resource development program for the eastern region in relate to the most neighboring country in Japan. In conclusion, we propose that Japanese government should establish a strategic office as soon as possible for getting the reciprocal energy security between Japan and Russia as the result of this evaluation study based on geo-political viewpoint.
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Kazuo Fujita
Article type: Article
Session ID: 2-1-4
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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Japan's Methane Hydrate Research Program Phase I since 2001 has been successfully completed in 2008. This paper briefly reviewed and summarized the accomplishment of past eight years of activities. As a head of Evaluation Committee for this MH national research project, the author pointed out significance of this MH project, however he also gave some serious advices and recommendations in front of the Phase II.
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Yoshitaka Yamamoto, Taro Kawamura, Michica Ohtake, Akihiro Wakisaka, A ...
Article type: Article
Session ID: 2-2-1
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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Correlation between reaction conditions (reaction temperature/ time) and CO_2 hydrate formation rate under low-temperature and low-pressure conditions were studied using the bench scale hydrate formation apparatus with ultrasonic mist generator. As a result, hydration yield increased almost linearly with reaction temperature. On the other hand, though hydrate formation also progressed with reaction time, formation rate reduced with passing of time. Increase of hydrate film thickness on the surface of micro-ice and contamination of larger size ice particles seemed to be the causes of this deceleration.
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Yoshitaka YAMAMOTO, Taro KAWAMURA, Michika OHTAKE, Tomoya TSUJI, Atsus ...
Article type: Article
Session ID: 2-2-2
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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Thermal conductivities of columnar model samples, which were constructed by series /parallel combination of acryl resin and stainless steel, were measured with steady state method. Estimated values of corresponding mixing models (series /parallel model) reproduced measured values satisfactory. Similar experiments with artificial sediment samples, which were constructed by natural hydrate layer sediment, were also carried out. Sufficient agreement of estimated and measured values for them was also confirmed.
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Hideki MINAGAWA, Yasunori NISHIKAWA, Yoshie Takahashi, Hideo NARITA
Article type: Article
Session ID: 2-2-3
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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In this study, we examined the efficiency of electrical heating of the hydrate core for gas production. To ensure safety and avoid explosions, we investigated the electrical heating for xenon gas hydrate sediment, instead of methane hydrate sediment. Alternating current (AC) heating with depressurization and additional electrode heating of hydrate sediment, which had saturated by electrolyte solution was confirmed to enable gas production from sediment with less electric power.
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Toshiki SHIGA, Masafumi NAGAYAMA, Kazutoshi GOHARA, Tsutomu UCHIDA
Article type: Article
Session ID: 2-2-4
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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Recently, hydrates have been researched for new natural gas storage media. However, sintering phenomenon of hydrates has not been studied yet. If hydrate samples sinter each other, it will be harder to use. In this study, we made in-situ observation of sintering process on clathrate hydrate particles. We found the sintering rate of hydrate particles was smaller than ice.
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Taro KAWAMURA, Satoru HIGUCHI, Yoshitaka YAMAMOTO, Yoshishige KAWABE, ...
Article type: Article
Session ID: 2-2-5
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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Clathrate formation from coal bed methane and its drained water has been investigated experimentally, aiming an efficient transport system of coal bed methane. Obtained phase equilibrium data of drained water suggested slight higher pressure at same temperature than that of pure water. Condensation of ingredient in drained water was observed after clathrate formation.
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Teppei TOMONOBU, Xiaohong LI
Article type: Article
Session ID: 2-3-1
Published: July 30, 2009
Released on J-STAGE: March 22, 2017
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Liquefied petroleum gas (LPG) fuel was synthesized directly from synthesis gas (CO+H_2) over the hybrid catalyst which containing methanol synthesis catalyst and metals supported zeolite. In this study, the hybrid catalyst which containing Cu-Zn catalyst and Pd-Cu/β-zeolite was used with slurry reactor to efficiently removes the heat produced by the exothermic reaction. As a result, this catalyst showed 60% CO conversion and 50% LPG selectivity stably.
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