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日本エネルギー学会誌 Vol. 81 (2002), No. 12

ISIJ International
belloff
オンライン版ISSN: 1882-6121
冊子版ISSN: 0916-8753
発行機関: The Japan Institute of Energy

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キーワードランキング

15 May. (Last 30 Days)

日本エネルギー学会誌 Vol. 81 (2002), No. 12

NEDOL法石炭液化プロセスの溶剤水素化処理 (IV)

高津 淑人, 栗木 安則, 杉本 義一

pp. 1069-1077

DOI:

10.3775/jie.81.1069

抄録

Recycle solvents obtained from 150t/d NEDOL coal liquefaction pilot plant were hydrotreated over sulfided Ni-Mo/γ-Al2O3 by using an experimental downflow fixed bed reactor at 325°C under 8MPa to examine an influence of composition of solvent on the solvent hydrotreatment. The hydrotreated solvents were divided into seven fractions (compound classes) by HPLC, and the hydrogenation reactivity of each compound class was investigated.
The hydrogenation reactivity of the compound classes was in the following order, mono-aromatics << di-aromatics < tetra-aromatics < tri-aromatics < polar fraction. When Adaro or Ikeshima coal was processed in the pilot plant, as compared with an operation for Tanito-harum coal, the reaction rate constant for solvent hydrotreatment decreased owing to smaller content of polar fraction.
The increase of partially hydrogenated aromatic compounds, naphthenic compounds, in the solvent lowered the hydrogenation reactivity of the non-polar aromatic fractions. The decrease of the reaction rate constant for solvent hydrotreatment in an operation with higher coal concentration slurry (40→50wt%) resulted from the increase of the partially hydrogenated aromatic compounds due to the enhancement of degree of solvent hydrotreatment to promote the hydrogen donating ability.
Results of a series of our researches for the solvent hydrotreatment are useful in identifying the nature of feedstock for solvent on the basis of the properties of coal employed and the operating conditions, which helps to design the solvent hydrotreater.

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NEDOL法石炭液化プロセスの溶剤水素化処理 (IV)

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Ris

マイクロガスタービン導入時の省エネルギー及び環境影響評価

嵐 紀夫, 玄地 裕, 八木田 浩史, 稲葉 敦

pp. 1078-1088

DOI:

10.3775/jie.81.1078

抄録

It can be supposed that introduction of MGT-CGS to small-medium size buildings will increase in future from the view point of energy saving and global environment because of its suitable capacity to such buildings and high efficiency. In this paper environmental burden of MGT-CGS was evaluated in terms of CO2 emission in both production and operation stages of the system. Investigation was proceeded for the case in which MGT-CGS was applied to an apartment house (floor space 12, 000 m2) and a super market (floor space 3, 000 m2) as an example. The result was compared with that of grid electricity and heat supply system with absorption chiller-heaters. The possibility of CCO2 emission reduction was clearly illustrated when the MGT-CGS was installed for an apartment house and a supermarket in common, on the contrary CCO2 emission was increased in the case of application to each building respectively.
MGT-CGS was more energy saving and less CCO2 emission system in operation stage, although in production stage MGT-CGS emits more CCO2 than the ordinary system. This CCO2 difference in production stage can be compensated in short time by the large annual CCO2 emission reduction in operation. The time was 0.43 years in terms of CCO2 pay back.

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マイクロガスタービン導入時の省エネルギー及び環境影響評価

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15 May. (Last 30 Days)

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