Mechanism of adsorption of water in carbon micropores as revealed by a study of activated carbon fibers

被引:83
作者
Alcañiz-Monge, J
Linares-Solano, A
Rand, B
机构
[1] Univ Alicante, Dept Quim Inorgan, E-03080 Alicante, Spain
[2] Univ Leeds, Dept Mat, Leeds LS2 9JT, W Yorkshire, England
关键词
D O I
10.1021/jp014388b
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The phenomenon of water adsorption in microporous carbons is investigated using activated carbon fibers as the adsorbents. It is shown that the process of water adsorption is due to both physical adsorption and chemical interaction with surface groups. In accordance with this process, the filling of the micropores is shown to be progressive, the narrower micropores being filled first, and then water is adsorbed in the whole range of microporosity. This study confirms that water adsorbed in the porosity of the carbon has a solid-phase structure throughout the whole range of micropore size and, therefore, the density of adsorbed water has to be considered to be around 0.92 g cm(-3).
引用
收藏
页码:3209 / 3216
页数:8
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