Investigation on the Adsorption Mechanism and Electro-osmosis Regeneration of Common Solid Desiccants

Zhang Guiying; Shao Shuangquan; Lou Xiangming; Tian Changqing

doi:10.3969/j.issn.0253-4339.2014.01.008

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Investigation on the Adsorption Mechanism and Electro-osmosis Regeneration of Common Solid Desiccants

更新时间：2024-07-18

- Investigation on the Adsorption Mechanism and Electro-osmosis Regeneration of Common Solid Desiccants
- Journal of Refrigeration Vol. 35, Issue 1, (2014)
- 作者机构：
  
  1. 中国科学院理化技术研究所
  2. 中国科学院大学
  3. 杭州娃哈哈集团有限公司
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0253-4339.2014.01.008
  CLC：
- Published：2014
- 稿件说明：
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Zhang Guiying, Shao Shuangquan, Lou Xiangming, et al. Investigation on the Adsorption Mechanism and Electro-osmosis Regeneration of Common Solid Desiccants[J]. Journal of refrigeration, 2014, 35(1).
DOI：

Zhang Guiying, Shao Shuangquan, Lou Xiangming, et al. Investigation on the Adsorption Mechanism and Electro-osmosis Regeneration of Common Solid Desiccants[J]. Journal of refrigeration, 2014, 35(1). DOI： 10.3969/j.issn.0253-4339.2014.01.008.

摘要

电渗再生固体除湿剂具有节能、系统简单等优点，得到了越来越多的关注。本文利用比表面及孔隙度分析仪测试了沸石、大孔硅胶两种常用固体除湿剂的吸附性能；分析了其吸附机理和利用电渗再生的可能性。沸石吸附时属于单层吸附或多孔填充，水分以分子态存在于沸石微孔内，无法形成电渗效应；大孔硅胶吸附时，发生毛细凝结，吸附饱和时存在液态水，存在通过电渗效应再生的可能性。通过实验得到了沸石30V时存在电渗效应的临界含水率在40%~55%之间，高于其饱和含水率，初步验证了沸石在非饱和时不存在电渗效应。大孔硅胶95%含水率、60V电压时不存在电渗效应，105%含水率40V、50V、60V电压时存在电渗效应，同时在非饱和时可以通过电渗效应降低其本身的含水率。

Abstract

Regeneration of solid desiccants by electro-osmostic effect caught more and more attentions due to its energy saving and simplicity. The surface area and pore size analyzer was used to test the adsorption performance of the zeolite and the macroporous silica gel firstly. The possibility of electro-osmosis regeneration for the zeolite and the macroporous silica gel has been analyzed combined with different desiccants adsorption and electro-osmosis effect. The adsorption mechanism of the zeolite is monolayer adsorption or porous filler. The water exists in the micro pore of the zeolite in molecular state

thus it can’t form electro-osmosis effect. Capillary condensation happens for macroporous silica gel. The liquid water exists when it is saturated

so it is possible for macroporous silica gel to be regenerated by the electro-osmosis effect. The experiment results show the critical moisture content existing electro-osmosis effect of zeolite is between 40%~55% when the voltage is 30V which is higher than its saturated moisture content. This result verifies that there is no electro-osmosis effect for the zeolite when it is unsaturated. As for the macroporous silica

there is no electro-osmosis effect when the moisture content is 95% and the voltage is 60V. And electro-osmosis effect exists for 105% moisture content and 40V

50V and 60V voltage. Electro-osmosis effect can reduce the moisture content of the macroporous silica gel when it is unsaturated.

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Lu Zisheng1 Wang Ruzhu1 Xia Zaizhong1 Dai Yanjun2 Lu Xiurui2 Yang Chuanbo2(1 Engineering Research Center Solar Power & Refrigeration,Shanghai Jiao Tong University,Shanghai,200240,China,2 Himin Solar Energy Group Co.,Ltd.,Sh,ong

Institution of Refrigeration & Cryogenics at Shanghai Jiao Tong University

Merchant Marine college, Shanghai Maritime University

Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University

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