Experimental investigation on adsorption and electro-osmosis regeneration of macroporous silica gel desiccant

Guiying Zhang, Changqing Tian and Shuangquan Shao

Applied Energy, 2014, vol. 136, issue C, 1010-1017

Abstract: In this paper, the possibility on electro-osmosis regeneration of macro-porous silica gel (MSG) desiccant has been investigated by testing the adsorption and electro-osmosis characteristic. The measured saturated moisture content of MSG is 113% in 300K temperature and 95% relative humidity. Its zeta potential is −10.92mV, which shows it has both good moisture absorption and electro-osmosis characteristic. The experiment bench is built to test the electro-osmosis regeneration performance on MSG by means of changing initial moisture content (105% and 110%) and applied voltage (40V, 50V and 60V) respectively. The D-value of moisture content between the bottom and upper half with voltage is much higher than that without voltage. For the 110% initial moisture content, there are many visible condensing water droplets on the inside surface of plastic film under the cathode. Based on experimental results, it can find electro-osmosis flow exists when the moisture content is lower than the saturated moisture content. Besides, the electro-osmosis regeneration is one potential method of MSG desiccant when it is applied in dehumidification.

Keywords: Electro-osmosis; Adsorption; Moisture content; Regeneration; Macroporous silica gel (search for similar items in EconPapers)
Date: 2014
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Citations: View citations in EconPapers (3)

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DOI: 10.1016/j.apenergy.2014.04.087

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