活性炭吸附-微波解吸处理含甲苯废气的研究

Study on the treatment of toluene-contained gas using active carbon adsorption-microwave desorption technology

以甲苯作为挥发性有机化合物的代表,以活性炭为吸附剂,研究了活性炭对甲苯的吸附性能及载甲苯活性炭的微波解吸过程.实验结果表明:活性炭对甲苯有良好的吸附性能,其吸附等温线可用Langmuir方程描述;微波解吸过程单因素分析时,最优条件分别为解吸温度400℃,载气线速7.3 cm/s,微波辐照时间45min;活性炭连续5次吸附、微波解吸,总损耗率为2.16%.

The adsorption of toluene on active carbon and the microwave desorption of active carbon loading toluene were studied, and toluene was used as a representative of volatile organic compounds. Results show that active carbon has good adsorption performance on toluene and adsorption isotherm can be depicted by Langmuir equation. Single factor analysis of microwave desorption experiment indicates that desorption temperature at 400℃ ,carrier gas velocity of 7.3 cm/s and irradiation time 45 min are the favorable conditions. After 5 successive adsorptions and microwave desorptions, the rate of active carbon loss is 2.16%.