吸附挥发性有机化合物树脂的高效微波再生过程

主要研究应用微波辐射再生高聚物吸附树脂.论述了微波加热的优点和微波脱附的原理，以乙醇为吸附质研究了吸附和微波辐射再生吸附剂过程.进行了正流微波辐射脱附和逆流微波辐射脱附实验，测定了微波脱附流出曲线和床层的温升曲线，并与传统的热脱附流出曲线和在不同加热速率下得到的床层温升曲线进行比较.实验结果表明：微波脱附比热脱附脱附速度更快，效率更高；高聚物吸附树脂类吸附剂对微波是半透明的，它对微波的吸收能力随着温度的升高而下降，因此，在微波辐射下，吸附剂床层吸收微波的能力也随着床层温度的升高和吸附质的脱附而减弱，床层最终温度不超过84℃，可使吸附剂的结构和性能不会被破坏和受影响，这有利于吸附剂的循环使用.微波在脱附和吸附剂再生中有很好的应用前景.

EFFICIENT MICROWAVE RADIATION REGENERATION OF POLYMERIC RESIN ADSORBING VOLATILE ORGANIC COMPOUND

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.