摘要：选用天然矿物凹凸棒石为吸附剂载体，将聚乙烯亚胺浸渍到载体上，制备新型CO2吸附剂，考察改性剂种类、负载量、吸附温度等对CO2吸附性能的影响。结果表明，聚乙烯亚胺（PEI, Mw=1800。99%）改性后的凹凸棒石对CO2吸附量大于聚乙烯亚胺（PEI, Mw=600。99%）改性凹凸棒石；随PEI的负载量增大，吸附剂对CO2吸附性能增大，当负载量为60%，吸附温度为60℃时，CO2吸附量达到了1。2376mmol/g；随吸附温度的升高吸附容量先增加后减小，60 ℃时CO2吸附量最大；经硅烷偶联剂KH550改性的吸附剂要比未改性的吸附剂吸附性能好；当水分存在时，吸附性能有显著提高。经5次吸/脱附循环后，吸附量没有明显降低，表现出较好的循环稳定性。94846
毕业论文关键词：凹凸棒石；聚乙烯亚胺；二氧化碳；吸附
ABSTRACT: The natural mineral attapulgite was used as the adsorbent carrier, and the polyethylene imine was impregnated into the carrier to prepare the new CO2 adsorbent。 The effects of modifier type, loading capacity and adsorption temperature on the adsorption performance of CO2 were investigated。 The results showed that the amount of CO2 adsorbed by polyethyleneimine (PEI, Mw=1800。99%) modified attapulgite was higher than that of (PEI, Mw=1800。99%) Modified Attapulgite 。The adsorption capacity of CO2 increases with the increase of PEI loading。 When the amount of loading is 60% and the adsorption temperature is 60 DEG C, the amount of CO2 adsorption reaches 1。2376mmol/g。 the adsorption capacity increases first and then decreases with the increase of adsorption temperature, the adsorption capacity of CO2 was the largest at 60 centigrade。 The adsorbent modified by silane coupling agent KH550 has better adsorption properties than unmodified adsorbent 。 When the moisture content exists, the adsorption performance is improved remarkably。 After 5 adsorption-desorption cycles , amines functionalized palygorskite has not noticeable decrease in CO2 adsorption capacity which displays excellent regenerability and stability。
Keywords:Attapulgite, Polyethyleneimine,CO2,Adsorption
目录
1 前言 5
1。1 常用CO2分离方法 5
1。1。1 吸收法 5
1。1。2 膜分离法 6
1。1。3 生物分离法 6
1。1。4 吸附法 6
1。2 CO2吸附剂研究进展 7
1。2。1 碳基吸附剂 8
1。2。2 沸石类吸附剂 8
1。2。3 金属氧化物 8
1。3 吸附材料表面改性方法 8
1。4 凹凸棒粘土概述和性能 9
1。4。1 凹凸棒粘土概述 9
1。4。2 凹凸棒粘土性能 10
1。5 本文研究目的及内容 11
1。5。1 研究目的 11
1。5。2 研究内容 11
2。1 实验部分 11
2。1。1 实验药品与仪器 11
2。2 吸附剂制备 12
2。2。1 采用浸渍法将聚乙烯亚胺负载到凹土上 12 聚乙烯亚胺修饰凹凸棒石吸附CO2性能研究:http://www.youerw.com/huaxue/lunwen_202960.html