摘要
以苯乙烯、二乙烯基苯为原料,采用悬浮聚合法制备了凝胶型聚苯乙烯树脂球,经磺化、炭化、水蒸气活化,得到聚苯乙烯基球形活性炭(PACSs)。通过氮气吸附、二氧化碳吸附对球形活性炭的孔结构进行表征,采用固定床吸附探究其对低浓度丙酮的吸附性能。结果表明,球形活性炭的孔结构可以通过控制活化时间来调控,其比表面积和总孔容均随着活化时间的延长而增加,其中比表面积在789~2 022 m^2/g内可调,而微孔孔容所占比例(V_(micro)/V_t)和比表面积所占比例(S_(micro)/S_(BET))则随活化时间的延长先升高后降低。活化时间为1 h时,球形活性炭对丙酮具有最大吸附量。同时,孔径在0.4~0.5 nm的超微孔孔容是低浓度丙酮气体饱和吸附量的决定因素。
Polystyrene-based activated carbon spheres（ PACSs） are prepared by sulfonation,carbonization and steam activation of gel-type polystyrene resin balls obtained by suspension polymerization of styrene and divinylbenzene.The pore structures of PACSs are characterized by N_2 adsorption and CO_2 adsorption. Their adsorption abilities for low concentration acetone are investigated in a fixed-bed reactor. The results show that the pore structures of PACSs could be adjusted by controlling activation time,with BET surface areas（ S_（BET）） in the range of 789 m^2/ g to 2 022 m^2/ g. The SBET and total pore volume（ V_t） increase through increasing the activation time,while the ratio of micropore surface area（ S_（micro）/ S_（BET）） and micropore volume（ V_（micro）/ V_t） are firstly increased and then decreased. The optimal activation time is found to be 1 hour,achieving a maximum adsorption amount of acetone. Meanwhile,the pore volume of narrow micropores（ 0. 4- 0. 5 nm） is the key factor for the adsorption capacity of low concentration cetone.
出处
《现代化工》
CAS
CSCD
北大核心
2016年第9期131-134,共4页
Modern Chemical Industry
基金
国家自然科学基金资助项目(21177038)
科技部支撑计划(2009BAE72B04)
关键词
球形活性炭
聚苯乙烯树脂
孔结构
丙酮吸附
activated carbon spheres
polystyrene resin
pore structure
acetone adsorption
