書誌事項
- タイトル別名
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- Fundamentals on Evaporation of Alkali Compounds.
- アルカリ キンゾク カゴウブツ ノ キソ ジョウハツ トクセイ
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In order to obtain fundamental data for alkali metal vaporization, the evaporation rate of alkali chlorides and alkali sulfates (NaCl, KCl, Na2SO4, K2SO4), which are major alkali compounds present in coal, were measured under inert, oxidizing and reducing atmosphere by using a thermobalance. A diffusion model was applied to obtain alkali metal evaporation data and identify an evaporating path and a rate controlling phenomena.<BR>Alkali chlorides evaporated as monomers and dimers. The evaporation rate is explained by a diffusion model. In the case of alkali sulfates, a dissociation reaction occurred simultaneously with evaporation as monomer. In inert and oxidizing atmospheres, the dissociation reaction was represented as<BR>M2SO4⇒2M+SO2+O2<BR>Evaporation rates can be calculated by a diffusion model in oxidizing atmosphere. In an inert atmosphere, however, when dissociation becames remarkable evaporation rate is controlled by the dissociation rate. Under a reducing atmosphere the expected reaction was represented as<BR>M2SO4+2CO⇒2M+SO2+2CO2<BR>This reaction does not reach equilibrium, so that the following reactions controll evaporation rate.<BR>M2SO4⇒2M+COS+5CO2<BR>COS+2CO2⇒SO2+3CO
収録刊行物
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- 化学工学論文集
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化学工学論文集 23 (5), 635-643, 1997
公益社団法人 化学工学会
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詳細情報 詳細情報について
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- CRID
- 1390282679486394240
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- NII論文ID
- 10002767963
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- NII書誌ID
- AN00037234
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- ISSN
- 13499203
- 0386216X
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- NDL書誌ID
- 4293927
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
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- 使用不可