氨基修饰复合型钠基吸收剂的脱碳特性  

Carbonation characteristics of sodium-based sorbents with amino modification for CO_2 capture

作　　者：余帆[1] 吴烨[2] 董伟[1] 蔡天意 张文静[1] 张聪[2] 陈晓平[1] 

机构地区：[1]东南大学能源与环境学院,能源热转换及其过程测控教育部重点实验室,江苏南京210096 [2]南京理工大学能源与动力工程学院,江苏南京210094

出　　处：《化工学报》2015年第10期4218-4227,共10页CIESC Journal

基　　金：国家自然科学基金项目(51476030);高等学校博士学科点专项科研基金(20130092110006)~~

摘　　要：为弥补常规钠基吸收剂活性差、脱碳量低的不足,制备了多种表面氨基修饰的新型复合型钠基吸收剂并研究其脱碳特性。通过比较氨基流失率和实际脱碳量,选定二氧化硅的前驱物正硅酸乙酯为载体前驱物,以碳酸钠为活性成分,分别以3-氨基丙基三甲氧基硅烷(APS)、3-氨基丙基三乙氧基硅烷(APTES)、二乙烯三胺(DETA)、三乙烯四胺(TETA)为氨基前驱物,制备得到多种表面氨基修饰的复合型钠基吸收剂。探究各种吸收剂的孔隙结构与脱碳特性,结果表明,APS、APTES修饰后吸收剂孔隙特性较差,脱碳量较低,DETA、TETA修饰后吸收剂孔隙结构得到改善,脱碳量较高。In order to improve the CO2 sorption performance of sodium-based sorbent, a series of sodium-based sorbents with amino modificationwere prepared by sol-gel method and the corresponding CO2 sorption capacity were investigated in this paper. Tetraethylorthosilicate （TEOS） was chosen as the carrier precursor by comparing the amine loss rate and CO2 sorption capacity of pure –NH2 sorbents,and Na2CO3 was as the active ingredient. 3-aminopropyltrimethoxysilane （APS）, 3-aminopropyltriethoxysilane （APTES）, diethylenetriamine （DETA） and triethylenetetramine （TETA） were used, respectively as the amino precursor for synthesizing the composite sorbents and then drying them with conventional technique. Results showed that the sorbent modified with TETA had the highest CO2 sorption capacity and the best pore structure, while that modified with APTES had the lowest amine loss but poor structure.

关 键 词：CO2捕集 固体吸收剂 NA2CO3 氨基修饰 二氧化硅 溶胶凝胶法 

分 类 号：TK09[动力工程及工程热物理]