关键词:

挥发性有机化合物, 吸附树脂, 微波脱附, 热脱附

Abstract: This paper is mainly concerned with regeneration of adsorption polymeric resin by microwave.The principle of regeneration of polymeric resin using microwave radiation was presented.Adsorption of ethanol on the resin and its desorption from the resin using microwave radiation were studied. Experiments of cocurrent desorption and countercurrent desorption of ethanol from the polymeric resin in a fixed bed using microwave radiation were conducted, and the corresponding elution curves of ethanol desorption and the temperature-rise curves of the fixed bed were respectively measured. Comparisons between the desorption elution curves obtained separately by using microwave radiation and direct heating were made. The desorption rate of ethanol by microwave radiation was higher than that by heating. The polymeric resin used in this work is semi-transparent to microwave and its ability to absorb microwave decreases with increase in temperature. Therefore, with temperature rise and desorption of adsorbate under microwave radiation, the ability of the fixed bed to absorb microwave gradually weakens and thus the final temperature of the fixed bed does not exceed 84℃. The use of microwave radiation to regenerate adsorption resin will be promising.

Key words:

挥发性有机化合物, 吸附树脂, 微波脱附, 热脱附