Adsorption of water Vapor and carbon dioxide at carboxylic functional groups on the surface of coal
Adsorption of water Vapor and carbon dioxide at carboxylic functional groups on the surface of coal
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DOI：
10.1016/s0016-2361(00)00136-8
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发表时间：
2001-04-01
期刊：
影响因子：
7.4
通讯作者：
Nishino, J
中科院分区：
文献类型：
--
作者：
Nishino, J
研究了20种不同煤表面羧基对水蒸气和二氧化碳的吸附，发现煤表面羧基是煤吸附水蒸气和二氧化碳的优先吸附部位。水蒸气和二氧化碳的吸附量与羧基浓度的平方根成比例增加，与分压和气体种类无关。假定疏水基质表面存在功能性汤吸附位点，吸附以类液体的紧密堆积状态发生，基于煤表面的羧基汤浓度确定煤的吸附量。吸附物的分子截面和分子量。的表面积并不取决于吸附质的类型，如观察到的水蒸气和二氧化碳吸附在煤上。(C)2001爱思唯尔科技有限公司版权所有。
The adsorption of water vapor and carbon dioxide at room temperature in relation to carboxylic functional groups on the surfaces of 20 different types of coal was examined.The carboxylic functional groups on the surface of coal may be considered the preferential sites of adsorption when compared with the other groups. The adsorption of water vapor and carbon dioxide was found to increase in proportion to the square root of the carboxyl group concentration, regardless of the partial pressure or the gas species.Assuming functional soup adsorption sites to be present on the surfaces of hydrophobic matrices and adsorption to occur in a liquid-like closed packed state, the adsorption on coal was determined based on the carboxyl soup concentration on the coal surface, the molecular cross section and the molecular weight of the adsorbate. The surface area did not depend on the type of adsorbate, as was observed for water vapor and carbon dioxide adsorption on coal. (C) 2001 Elsevier Science Ltd. All rights reserved.