文献类型：期刊文献

中文题名：树脂基固态胺吸附剂室温下对低浓度CO_(2)的吸附性能研究

英文题名：Ambient temperature sorption of low-concentration carbon dioxide on resinbased solid amine sorbents

作者：赵蓓蓓[1];王际童[1];王梅[1];乔文明[1];龙东辉[1];凌立成[1]

机构：[1]化学工程联合国家重点实验室,华东理工大学,上海200237

年份：2014

卷号：34

期号：11

起止页码：2892

中文期刊名：环境科学学报

外文期刊名：Acta Scientiae Circumstantiae

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：国家自然科学基金(No.51302083,51172071)

语种：中文

中文关键词：大孔吸附树脂;固态胺吸附剂;二氧化碳;吸附

外文关键词：macroporous resin;solid amine sorbents;CO_(2);sorption

摘要：以大孔甲基丙烯酸酯吸附树脂为载体,聚乙烯亚胺(PEI)为有机胺,采用液相浸渍法制备出固态胺吸附剂,并研究了其在室温下对低浓度CO_(2)的吸附行为.同时,利用氮气吸附、热重分析和扫描电镜表征了材料的物理化学性质,并采用热重法和固定床吸附法考察了材料的CO_(2)吸附性能.结果表明,大孔树脂担载50%PEI(质量分数)时吸附性能最佳,对纯CO_(2)的最大吸附量为175 mg·g^(-1);CO_(2)的吸附行为由扩散动力学与吸附热力学共同决定,低温有利于提高吸附容量;吸附剂对400 ppm^15%浓度的CO_(2)都具有优异的动态吸附性能,其中对400 ppm CO_(2)的吸附量达到86 mg·g^(-1),对15%CO_(2)的吸附量达到150 mg·g^(-1);湿度对吸附起促进作用,相对湿度为10%时,对400 ppm CO_(2)的吸附量提高至139mg·g^(-1);吸附剂具有优异的循环性能,具有直接空气捕集CO_(2)的潜力.
Resin-based solid amine sorbents were developed by macroporous adsorption resin impregnated with polyethylenimine(PEI)for regenerative ambient-temperature removal of low concentration CO_(2).The physicochemical properties of the sorbent were characterized by N2 adsorption/desorption,scanning electron microscopy(SEM)and thermal gravimetric analysis(TGA)followed by tests for CO_(2)capture using TGA and fixed bed experiment.The optimal PEI loading was 50%with a pure CO_(2)sorption capacity of 175 mg·g^(-1).The sorption behavior was determined by the kinetic diffusion and thermodynamic sorption.Low temperature favored the thermodynamic sorption and resulted in high sorption capacity.The sorbents had excellent CO_(2)sorption capacities over the concentration rang of 400 ppm~15%.The sorption capacities as high as 86 mg·g^(-1)and 150 mg·g^(-1)were obtained for 400 ppm CO_(2)and 15%CO_(2)flow,respectively.The humidity played a promoting role on the sorption capacity of 400 ppm CO_(2),and a remarkable improvement of139 mg·g^(-1)was achieved for a relative humidity of 10%.The sorbents also exhibited stable sorption/desorption cycling performance.All these results suggested that the as-prepared solid amine sorbents had a great potential in room-temperature direct air capture of CO_(2).