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水溶性吸收剂对甲苯废气的吸收性能

麦 戈 肖 潇 晏 波 肖贤明

麦 戈, 肖 潇, 晏 波, 肖贤明. 水溶性吸收剂对甲苯废气的吸收性能[J]. 环境科学研究, 2015, 28(10): 1602-1609.
引用本文: 麦 戈, 肖 潇, 晏 波, 肖贤明. 水溶性吸收剂对甲苯废气的吸收性能[J]. 环境科学研究, 2015, 28(10): 1602-1609.
MAI Ge, XIAO Xiao, YAN Bo, XIAO Xianming. Toluene Absorption Performance of Typical Water Soluble Absorbents[J]. Research of Environmental Sciences, 2015, 28(10): 1602-1609.
Citation: MAI Ge, XIAO Xiao, YAN Bo, XIAO Xianming. Toluene Absorption Performance of Typical Water Soluble Absorbents[J]. Research of Environmental Sciences, 2015, 28(10): 1602-1609.

水溶性吸收剂对甲苯废气的吸收性能

基金项目: 广东省自然科学基金杰出青年基金项目(S2013050014122);广东省环境资源利用与保护重点实验室开放运行项目(2014B030301060)

Toluene Absorption Performance of Typical Water Soluble Absorbents

  • 摘要: 液体吸收法应用于处理工业有机废气涉及到2个关键因素,即吸收剂的选择与吸收液的再生处理. 选择8种水溶性吸收剂——2种氟碳表面活性剂(FSO100和FSN100)、2种非离子表面活性剂〔TW80(吐温80)和SP20(斯盘20)〕、2种阴离子表面活性剂〔脂肪醇聚氧乙烯醚硫酸钠(AES)和脂肪醇聚氧乙烯醚羧酸钠(AEC)〕及2种类表面活性剂〔β-CD(β-环糊精)和SA(乙酸钠), 对模拟甲苯废气进行了动力学吸收试验,研究吸收性能和加热蒸馏法对甲苯回收与吸收剂溶液再生的可行性. 结果表明:吸收剂类型是影响甲苯吸收能力的最主要因素. 2种氟碳表面活性剂吸收液的甲苯吸收能力最强,其次是SP20与AES,而其他4种吸收剂溶液对甲苯的吸收能力很弱. 上述3类吸收剂对甲苯的初始去除率分别为80%~90%、75%左右与60%~70%,甲苯饱和吸收浓度(以w计)分别为0.58~3.45、0.38~1.44与0.14~1.01 mg/g. 除TW80吸收液热稳定性差、不宜采用加热蒸馏方法再生外, 其他吸收剂溶液经5次重复使用,甲苯回收率可达70%~85%,并能保持其原有吸收性能. 甲苯分配系数计算结果表明,FSO100和FSN100分别为0.41、0.62, SP20和AES分别为0.76、0.95, 其他4种吸收剂溶液在1.12~3.54之间;甲苯分配系数与饱和吸收浓度呈负相关、与体积传质系数呈正相关. 因此,2种氟碳表面活性剂吸收液对甲苯的吸收能力强,加热蒸馏法回收甲苯与再生吸收液具有经济性,用于处理甲苯废气具有广泛的应用前景.

     

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出版历程
  • 收稿日期:  2015-03-15
  • 修回日期:  2015-06-28
  • 刊出日期:  2015-10-25

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