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日本エネルギー学会誌 Vol. 78 (1999), No. 10

ISIJ International
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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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日本エネルギー学会誌 Vol. 78 (1999), No. 10

産業連関表を用いた実用的なインベントリー分析手法の確立

本藤 祐樹, 内山 洋司

pp. 861-868

抄録

This paper discusses two main problems to develop practical inventory analysis using an input-output (I-O) table. The first is the allocation problem caused by use of an actual I-O table, which indicates transaction among sectors on monetary unit. When direct and indirect emissions at the production of commodities are calculated using conventional I-O analysis method, the values are underestimated or overestimated due to the assumption that a commodity is sold at a uniform price to all consumers. In this paper, modified method is presented, reflecting the fact that a commodity is sold at different prices to each consumer. It is found that CO2 emission factors of commodities estimated using the modified method are different from those using the conventional method. The second is the way to combine process analysis with I-O analysis for reasonable and practical inventory analysis. The merit of process analysis is precise estimation reflecting actual processes. On the other hand, I-O analysis theoretically enables consistent estimation taking account of all processes in society. This paper describes an inventory analysis method that makes the best use of merits of both. CO2 emission factor of a boiler is calculated using the method and the result proves the method to be available.

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産業連関表を用いた実用的なインベントリー分析手法の確立

石炭の固体NMR測定による芳香族クラスター平均サイズの推定

貴傳名 甲, 村田 聡, 野村 正勝, Masakatsu NOMURA

pp. 869-876

抄録

Measurements of solid-state NMR of eight Argonne Premium Coal Samples were conducted to estimate the average aromatic cluster size in these coals. Firstly, the carbon distribution was obtained from SPE/MAS 13C-NMR. Secondary, 1HCRAMPS NMR spectra gave the hydrogen aromaticity of coal. Combination use of the hydrogen aromaticity and elemental analysis data could afford the amount of tertiary aromatic carbon. The parameter of χb, the mole fraction of aromatic bridgehead carbons in all aromatic carbons, could be derived from above NMR data and elemental analysis of coal. χb is directly correlated to the number of aromatic carbon atoms per aromatic cluster, C. In this study, the value of C varied from 10 (corresponding to the size of naphthalene) for Beulah-Zap and Wyodak coals to 23 (corresponding to the size of coronene) for Pocahontas No.3 coal.

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石炭の固体NMR測定による芳香族クラスター平均サイズの推定

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