化工进展Issue(6)：1730-1736,7.DOI:10.16085/j.issn.1000-6613.2015.06.036
变色硅胶与ZSM-5沸石分子筛的吸附脱附特性
Adsorption and desorption characteristics of allochroic silica gel and ZSM-5 zeolite to water
摘要
Abstract
For application in solar cooling system,the adsorption and desorption characteristics of the allochroic silica gel and ZSM-5 zeolite to water vapor have been investigated experimentally. The result has revealed that the adsorption rate increases with the humidity of the air at a given temperature , but the rate increment gets small gradually as the humidity increases. Ambient temperature impacts the adsorption rate seriously. The material tends to adsorb easily at low temperature and to desorb easily in high temperature. As temperature increases,the equilibrium adsorption concentration of material declines though the adsorption rate increases. In comparison,the adsorption rate of ZSM-5 zeolite is higher but its equilibrium adsorption concentration is lower in contrast to allochroic silica gel. The adsorption isotherm of silica gel is exponential and that of ZSM-5 zeolite shows an S-shape. As to the desorption characteristic,the result showed that ZSM-5 zeolite had desorbed faster than silica gel when temperature is lower than 100℃. In addition,ZSM-5 zeolite can desorb perfectly at a higher temperature while silica gel must desorb at the temperature less than 120℃,because a high temperature will cause silica gel lose its crystal water insides and fail to desorb.关键词
变色硅胶/ZSM-5沸石/吸附量/脱附Key words
allochroic silica gel/ZSM-5 zeolite/adsorption capacity/desorption分类
能源科技引用本文复制引用
辛凤,苑中显,王文超..变色硅胶与ZSM-5沸石分子筛的吸附脱附特性[J].化工进展,2015,(6):1730-1736,7.基金项目
国家自然科学基金项目（51276005）。 （）
