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

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  • Zhang, Guiying
  • Tian, Changqing
  • Shao, Shuangquan

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.

Suggested Citation

  • Zhang, Guiying & Tian, Changqing & Shao, Shuangquan, 2014. "Experimental investigation on adsorption and electro-osmosis regeneration of macroporous silica gel desiccant," Applied Energy, Elsevier, vol. 136(C), pages 1010-1017.
    • Handle: RePEc:eee:appene:v:136:y:2014:i:c:p:1010-1017
    DOI: 10.1016/j.apenergy.2014.04.087
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    References listed on IDEAS

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