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日本エネルギー学会誌 Vol. 83 (2004), No. 5

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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キーワードランキング

21 Dec. (Last 30 Days)

日本エネルギー学会誌 Vol. 83 (2004), No. 5

高温NMRによる軟化溶融石炭の擬似成分ランピング解析

宮澤 邦夫, 野田 健史, 板垣 省三, 下山 泉, 千葉 忠俊, Richard SAKUROVS

pp. 354-359

DOI:

10.3775/jie.83.354

抄録

High-temperature NMR (Proton magnetic resonance thermal analysis) was applied to study the fluidity of slightly-caking coals and coking coals. A pseudo component lumping analysis was made analyzing the free induction decays of these coals into three components, i.e., a rigid component, an intermediate compo-nent and a mobile component. The amount of the mobile component correlates the maximum fluidity (MF) obtained by the Gieseler plastmeter between MF=100-3000ddpm. It was found that the characterization using the amount of the mobile component is more useful than that using the maximum fluidity for several coals having small MF(MF<-20). It was also suggested that the intermediate component corresponds to a new component caused by the interaction of the mobile component with the rigid component in coal.

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高温NMRによる軟化溶融石炭の擬似成分ランピング解析

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Ris

Ca (OH) 2を含む石炭ブリケットの燃焼における脱フッ素特性

劉 丹, 定方 正毅

pp. 360-366

DOI:

10.3775/jie.83.360

抄録

Research on the control of fluoride emissions from coal combustion is necessary to solve a serious fluoride pollution problem. In this work, CaCO3 and Ca (OH) 2 were used as defluorination agents to decrease fluoride emissions during coal combustion. When the molar equivalency of Ca to F2+S equaled 1.8, the resulting defluorination efficiency of Ca (OH) 2 was 50% and deSO2 efficiency was 63% at 900°C. Experimental results showed that defluorination efficiency increased with increasing fuel ratio of coals or decreasing temperature.
White-coal, made by coating the surface of a coal briquette with a thin layer of Ca (OH) 2, was tested as a new solid fuel. The result shows that the white-coal emits less fluorides and SO2 in both volatile content combustion and char combustion.

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Ca (OH) 2を含む石炭ブリケットの燃焼における脱フッ素特性

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