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日本エネルギー学会誌 Vol. 81 (2002), No. 9

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

Backnumber

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23 Nov. (Last 30 Days)

日本エネルギー学会誌 Vol. 81 (2002), No. 9

1995年産業連関表を用いた温室効果ガス排出原単位の推計

本藤 祐樹, 森泉 由恵, 外岡 豊, 神成 陽容

pp. 828-844

DOI:

10.3775/jie.81.828

抄録

This study addresses the development of environmental database using Japanese input-output (I-O) tables for Life Cycle Inventory analysis (LCI). Many LCI case studies have been performed using Japanese I-O tables. However, most of these studies have focused only on CO2 emissions due to lack of high quality data concerning other substances that influence the environment. The objective of this study is to supply CO2 and CH4 emission factors of commodities estimated using the latest Japanese input-output table (1995). In general, emission factors are estimated using Japanese I-O table based on the assumption that all commodities are produced in Japan. In this paper, however, a method that permits to reflect the actual activities at the overseas production of import goods is used. The results show, (1) CH4 is not negligible when performing Life Cycle Assessment (LCA) from viewpoint of global warming, and (2) CO2 and CH4 emission factors estimated using the conventional method are very different from those using the method proposed in this paper because of the difference of technologies used in Japan and abroad.

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1995年産業連関表を用いた温室効果ガス排出原単位の推計

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石炭液化プラントの経済性 (I)

高木 勉, 中村 僚司, 清水 慎一, 矢幡 悌三郎

pp. 845-853

DOI:

10.3775/jie.81.845

抄録

The price of product oil is influenced by the costs of hydrogen and utility (power) supplied to the coal liquefaction plant, in which there are many choices for processes, raw materials and fuels. In this study, it is presumed that the coal liquefaction plant is located in the coal production area and the natural gas is not available. Furthermore, as the hydrogen production process, the steam reforming of the off-gas produced from the coal liquefaction plant and the gasification of raw coal and residue were selected. The boiler turbine generator (BTG) and integrated coal gasification combined cycle (IGCC) were selected for power generation.
By using Linear Programming (LP) techniques, the production costs of hydrogen and power were minimized in the combination of these production processes for the coal liquefaction plant. As a result of this LP study, the capital cost and production cost were reduced by introducing the steam reforming of off-gas along with the gasification of raw coal and residue, and were minimized at BTG in comparison with IGCC. It is expected that technical improvement of IGCC in future would lead to cost reduction of coal liquefaction.

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石炭液化プラントの経済性 (I)

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150t/d石炭液化パイロットプラントの液化油の物性

石橋 宏仁, 小根山 稔, 林 隆, 小林 正俊, 林 潤一郎, 伊藤 博徳, 千葉 忠俊

pp. 854-863

DOI:

10.3775/jie.81.854

抄録

Properties of coal-derived liquids were investigated for proper scaleup design of the NEDOL demonstration plant (DP) from the 150t/d capacity pilot plant (PP). Empirical and semi-empirical equations to estimate intrinsic, thermodynamic and transport properties were formulated on the basis of observed results in PP operation together with existing investigations for characterization of narrow boiling-point range distillates obtained by superfractionation. It was shown that the properties of coal-derived liquids in PP differ from those in 1t/d process supporting unit (PSU), the coal-derived liquids from which have a different composition of aromatic and paraffin compounds. It was also suggested that, for design of industrial coal liquefaction process, it is necessary to obtain engineering data under conditions where the process recycling liquids have attained equilibrium in the process after a sufficiently long term run.

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150t/d石炭液化パイロットプラントの液化油の物性

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