以廉价的无机铝盐为铝源,碳酸铵为沉淀剂,聚乙二醇1540为模板剂合成有序介孔氧化铝(OMA).以3-丙胺基三乙氧基硅烷(APTES)为氨基化剂,采用浸渍法将其嫁接到OMA孔内,形成氨基化的OMA用于吸附CO2.采用XRD、BET、TEM等测试技术对合成的吸附剂进行表征,通过固定床测量穿透曲线的方法研究其对CO2动态吸附性能.分别考察了吸附量、吸附温度、气体流量等因素对吸附性能的影响.结果表明,APTES负载量为30%的吸附剂、吸附温度为60℃、流量为40mL/min时对CO2吸附量最大,为0.639mmol/g;APTES/OMA经6次吸-脱循环后,其结构及吸附性能均变化较小,具有较好的稳定性和再生性能.
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