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坂脇 弘二, 野上 義信, 井口 憲二, 山本 久敬, 川端 睦麿, 遠藤 幸平
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p.
189-192
発行日: 1993/10/25
公開日: 2017/03/22
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At the operation of 1t/d Process Supporting Unit (PSU) on the coal liquefaction test using Wyoming coal, the blockade was occured in the coal slurry line. The rheological properties of coal-slurries prepared with the coals used on test of PSU were researched and the fluid state in the pipes were studied. There were differences in the rheological property between not only the kinds but also the lots of coal. It was found that increasing with coal concentration in slurry, it became to show the Pseud-plastic behavior in the lower region of shear rate, and then it had a tendency of occurence of blockade under this condition in the pipe.
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川端 睦麿, 池田 耕一, 望月 通晴, 遠藤 幸平, 野上 義信, 山際 寿, 井口 憲二, 山本 久敬
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p.
193-196
発行日: 1993/10/25
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Liquefaction tests were conducted on Wyoming coal at 1t/d Process Supporting Unit (PSU). And the effect of liquefaction reaction conditions (reaction pressure, amount of catalyst addition, G/L and Δfa of recycle solvent) on the product yield was studied. From the result, reaction mechanism was considered and reaction model was constructed. And it was estimated that the conditions for the maximum oil yield were the combination of the maximum operating conditions within the range of PSU operating conditions. As the result of the operation at the conditions, the liquefied oil yield was in good agreement with the calculated value.
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井上 聡則, 増田 薫, 大隈 修, 安室 元晴, 進藤 照浩, 平野 龍夫, 松村 哲夫
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p.
197-200
発行日: 1993/10/25
公開日: 2017/03/22
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Thermal treatment in liquefaction solvent was applied to Victorian brown coal as pretreatment for liquefaction. This treatment decomposes carboxylic groups in the coal and removes them as CO_2. This paper discusses the effects of the treatment conditions on decomposition of the carboxylic groups and suppression of the scale formation during liquefaction of the coal by this treatment.
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小山 徹, 田沢 和治, 兼子 隆雄, 蔭山 陽一
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p.
201-204
発行日: 1993/10/25
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The Hydrogenation of 1-methylnaphthalene as a model reaction of liquefaction was carried out over iron ore catalysts and synthetic iron catalysts, and the effects of catalysts properties on their activities were investigated. It was shown that the fine particle size, the large specific surface area and the iron vacancy of the pyrrhotite crystal of a spent catalyst contributed to a high catalytic activity.
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奥山 憲幸, 平野 龍夫, 松村 哲夫, 増田 薫, 大隈 修
原稿種別: 本文
p.
205-208
発行日: 1993/10/25
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In the brown coal liquefaction (BCL) process, a solvent de-ashing technique has been adopted to remove ash and heavy preasphaltenes from CLB (Coal Liquid Bottom, bp>420℃) as insoluble solids by gravity settling. This paper reveals the effects of de-ashing conditions on the concentration of the solids in a settler using a continuous de-ashing system and introduces an empirical equation for suitable de-ashing operation.
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西村 武, 木村 次雄
原稿種別: 本文
p.
209-212
発行日: 1993/10/25
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Light-middle distillates from Victorian Brown Coal were hydrotreated with Ni-Mo/Al_2O_3 and Ni-Mo-P/Al_2O_3 catalyst to investigate the optimum hydrotreating conditions. It was shown that high denitrogenation activities were obtained during 1500 hours operatios at the reaction temperature of 380℃. It appeared that Ni-Mo-P/Al_2O_3 was morel active and stable than Ni-Mo/Al_2O_3 under near practical conditions.
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原稿種別: 付録等
p.
App1-
発行日: 1993/10/25
公開日: 2017/03/22
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佐藤 信也, 榎本 稔
原稿種別: 本文
p.
213-216
発行日: 1993/10/25
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The average structure of some demineralized oil shale kerogens were carried out by means of ^<13>C CP/MAS NMR and solid state Dipolar Dephasing NMR (DD) techniques. The carbon aromaticity was determined by CP/MAS and the ratio of quaternary aromatic carbon and γ-CH3 carbon by DD techniques respectively. The average structure per 100 carbons consisted of 4〜6 aromatic and nafuthenic ring, respectively, and 3 aliphatic chains having terminal methyl. The number of fused ring system was varied from 1.4 to 6.
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鷹觜 利公, 飯野 雅, David E. Mainwaring
原稿種別: 本文
p.
217-220
発行日: 1993/10/25
公開日: 2017/03/22
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Loy Yang coal was mixed with N-methyl-2-pyrrolidinone (NMP) in a mortar. The rheological measurements showed that the suspension (coal: solvent=1:4.95) formed a highly elastic gel network. The visoelasticity were found to decrease gradually with age (1-5 days). The interactions between the coal and the solvent are discussed.
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天本 忍, 林 潤一郎, 草壁 克己, 諸岡 成治
原稿種別: 本文
p.
221-224
発行日: 1993/10/25
公開日: 2017/03/22
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Structural and interfacial properties of coals (C=65-91wt%) were investigated by means of inverse liquid chromatography, the stationary phase of which was coal particles preswollen in solvents. The carrier phase was acetonitrile, methanol or n-hexane. The molecular probes used were alkylbenzenes, polycyclic aromatic hydrocarbons (PAHs) and n-alkanes. The retention volume of the probes was measured in the temperature range of 20-50℃. The elution of the aromatic probes was controlled by the adsorption onto the coal surface. In most cases, the capacity ratio increased with increasing molecular volume of probe compound for each group of alkylbenzenes or PAHs. The capacity ratio of the PAHs was much larger than that of alkylbenzenes when their molecular volumes were equal, which indicates that the aromatic ring of a probe molecule was recognized by the coal more selectively than were alkyl chains. The π-π interaction was important for high-rank coals, and the OH-π interaction for low-rank coals.
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林 潤一郎, 川上 勉, 草壁 克己, 諸岡 成治
原稿種別: 本文
p.
225-228
発行日: 1993/10/25
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The effect of temperature profiles in the primary and secondary pyrolysis zones on thermal reactions of tar in the secondary pyrolysis was investigated in three kinds of flash pyrolyzers, an entrained-flow reactor, a fluidized-bed and a curie-point pyrolyzer, with Morwell brown coal and Wandoan high-volatile bituminous coal. The yield of mono-and diaromatic products was adopted as a measure of the vapor-phase reactivity of primary tar. The BTX and naphthalene yields for Wandoan coal was hardly affected by the primary pyrolysis temperature above 600℃, but that for Morwell coal was much influenced above 700℃.
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佐々木 皇美, 成田 英夫, 井戸川 清, 福田 隆至, 岡田 清史
原稿種別: 本文
p.
229-232
発行日: 1993/10/25
公開日: 2017/03/22
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Supercritical Fluids have high diffusion rate and solubility. In coal processing, the major interest has been in the development of supercritical extracting for the production of liquid fuels from coal. On the other hand, some works have reported concerning the removal of sulfur and ash in coal. This work attempts to investigate effects of supercritical water on coal properties. Coal was extracted by supercritical water using semi-butch reactor under various temperature and pressure. The results showed that carboxyl groups in coal decreased in supercritical water condition.
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清水 聖幸, 稲葉 敦, 斎藤 郁夫, 唐松 宏典, 岩見 吉博, 浜田 俊孝, 菅沼 彰
原稿種別: 本文
p.
233-236
発行日: 1993/10/25
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Lignite coal solubilization with super acid, trifluoromethane sulfonic acid-isopentane was studied through ionic reaction at the mild condition (150℃) without hydrogen gas. The solubility of the treated coal were examined in terms of TFMS concentrations at the reaction, chemical structure and oxygen containing functional groups, by comparing values to those of the treated coal from Taiheiyo coal.
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山田 能生, 古田 毅, 白石 稔, 大原 誠資, 菱山 正二郎
原稿種別: 本文
p.
237-239
発行日: 1993/10/25
公開日: 2017/03/22
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A steam-explosion method was applied to the pretreatment of coal. Taiheiyo and Obed-Marsh coals were steam-exploded at 230℃ for 6min. The particle and pore size distributions were measured to examine the physical changes of the coals. The result suggests that this method is effective for the formation of small pores in the coal. When the coals were immersed into methanol before the explosion, the effect was enhanced due to the penetration of steam into the coal particles.
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牧野 三則, Nina Bogdanchikova, 曽根田 靖, 安田 肇, 山田 理, 小林 光雄, 海保 守
原稿種別: 本文
p.
240-243
発行日: 1993/10/25
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To study the reaction between calcined limestones and hydrogen sulfide, the pore structures and the reaction rtes were measured for 22 limestones. The calcined limestones were classified in 3 types in relation to their pore sizes and surface areas. The reaction rates at the conversion of 50% were well corelated with pore surface areas with their activation energy ranging from 30 to 40kcal/mol.
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栗木 安則, 湯村 守雄, 大嶋 哲, 内田 邦夫, 伊ヶ崎 文和
原稿種別: 本文
p.
244-247
発行日: 1993/10/25
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The sulfide of iron-based fine particles as catalyst with dimethyldisulfide and H2S-H2 under various conditions, and the catalytic activities of those catalysts on hydrogenation and hydrocracking were investigated. The hydrogenation of 1-methyl naphtharene (1-MN) and hydrocracking of diphenylmethane (DPM) experiments were carried out in 25ml quartz tube inserted into 50ml stainless steel autoclave at 350-450℃ under 7.9MPa hydrogen initial pressure for 1hr. The crystal structure of spent iron particles were analyzed by X-ray diffractometer.
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山本 光義, 前河 涌典, 小谷川 毅
原稿種別: 本文
p.
248-251
発行日: 1993/10/25
公開日: 2017/03/22
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Heteroatom removal of dibenzofuran, dibenzothiophene, and carbazole and hydrogenation of anthrathene and pyrene were investigated in the presence of FeS_2, NiMo/Al_2O_3 and Ru/SiO_2・Al_2O_3 as catalysts by a high pressure DTA technique and autoclave test. In the case of dibenzothiophene, nuclear hydrogenation and HDS proceeded at the temperature below 300℃ and the hydrocracking proceeded over 300℃. Dibenzofurane was hydrocracked and hydrodeoxygenated over 300℃ in the presence of FeS_2 and NiMo catalysts, but Ru/SiO_2-Al_2O_3 catalyst was activeat about 200℃ for it. Carbazole was stable until 350℃ for HDN, but Ru/SiO_2・Al_2O_3 catalyst was very active for nuclear hydrogenation belowm. p.. Finally, anthracene and pyrene were stable for hydrocracking until 450℃, but easily hydrogenated.
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R.R. MARTIN, J.A. MACPHEE, 京谷 隆, 富田 彰
原稿種別: 本文
p.
252-255
発行日: 1993/10/25
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In order to examine the feasibility of catalyst recovery from liquefaction residue, fundamental study on the properties of catalyst in the residue was carried out by using two and three dimensional SIMS imaging techniques. Residues were obtained from 1t/d NEDOL PSU plant which uses Illinois coal as feedstock and synthetic pyrite as catalyst. The results suggested that the SIMS imaging provides a promising technique for the examination of liquefaction residue. However, interpretation becomes complicated when molecular secondary ion is present.
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横山 晋, 伊藤 好江, 佐藤 正昭, 真田 雄三
原稿種別: 本文
p.
256-259
発行日: 1993/10/25
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Aromatic ring class fractions separated by NH_2 column HPLC were analysed low and high voltage mass spectra by GC-MS. Various compound type defined by Z numbers were determined and Z mass chromatograms were measured as homologous series. Respective peaks of Z number mass chromatograms were assessed the degree of coelution with different components and GC peaks belonged to single component were measured on HV mass spectra to assign the specific components.
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進藤 照浩, 安室 元晴, 平野 龍夫, 松村 哲夫, 井上 聡則, 大隈 修
原稿種別: 本文
p.
260-263
発行日: 1993/10/25
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Hydrothermal treatment was applied to Victorian brown coal as pretreatment for liquefaction. This treatment removes inorganics (Na, Ca, etc.) and carboxylic groups in the coal which cause scale troubles during liquefaction. This paper discusses the scale formed during the operation of a 0.1t/d process development unit (PDU) and suppression of the scale formation by hydrothermal treatment.
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今井 潤, 小山 徹, 兼子 隆雄, 蔭山 陽一
原稿種別: 本文
p.
264-267
発行日: 1993/10/25
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The effect of a catalyst type on scale deposition in coal liquefaction was studied by a model reaction method. It was shown that deposition tendency was higher when a catalyst particle size was smaller in case of limonite, and that deposition tendency differed with types of catalysts, and became higher in order of a-Fe_2O_3, a-FeOOH≒γ-FeOOH, and Fe_3O_4.
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