基于超声微波耦合的机械力化学方法再生活性炭

Mechanical and Chemical Method Based on Ultrasonic-Microwave Coupling to Regenerate Activated Carbon

采用超声—微波联合碱法工艺对工业糖脱色废炭渣进行再生处理,探究了NaOH浓度,超声波、微波功率,温度和时间对活性炭再生效果的影响。实验结果表明,活性炭在NaOH浓度3 mol/L,温度80℃,时间35 min,微波功率400 w,超声功率700 w时,再生效果最好,活性炭吸附性能恢复最高。最佳条件下,碘值从322.0 mg/g增加到751.2 mg/g,总孔隙从0.5361 m 3/g增加到0.8552 m 3/g,BET比表面积从381.5 m 2/g增加到795.3m 2/g,大大提高了废炭渣的吸附性能,为废炭渣再生处理提供了高效的途径。

The waste carbon residue was regenerated by ultrasonic-microwave combined with alkali process treatment,and explored the effects of sodium hydroxide concentration,ultrasonic wave,microwave power,temperature and time on the regeneration effect of activated carbon.The results of this study indicated that the treatment could recover the regenerative capacity,to some extent,with the following optimal conditions:a concentration 3mol/L of sodium hydroxide,microwave power of 400 W,sonication power of 700 W,water temperature of 80℃,and treating time of 35min.Under the above conditions,the iodine value increased from 322.0mg/g to 751.2 mg/g,the volume of total pores increased from 0.5361 cm 3/g to 0.8552 cm 3/g,the specific surface area increased from 381.5m 2/g to 795.3m 2/g,respectively.It greatly improves the adsorption performance of waste carbon residue and provides an efficient way for recycling and utilization of waste carbon residue.