文献类型：期刊文献

中文题名：有机胺改性中孔炭吸附二氧化碳研究

英文题名：Study on carbon dioxide capture using amine-modified mesoporous carbons

作者：张重杰[1];贾占虹[1];杨三莉[1];王际童[2];龙东辉[2];凌立成[2]

机构：[1]山西新华化工有限责任公司,山西太原030008;[2]华东理工大学化学工程联合国家重点实验室,上海200237

年份：2014

卷号：33

期号：4

起止页码：35

中文期刊名：炭素技术

外文期刊名：Carbon Techniques

收录：CSTPCD;;北大核心:【北大核心2011】；

语种：中文

中文关键词：中孔炭;改性;吸附

外文关键词：Mesoporous carbon; modification; adsorption

摘要：以间苯二酚-甲醛为前驱体,二氧化硅溶胶为硬模板,采用溶胶-凝胶法制备出高孔容中孔炭材料,并利用物理担载途径制备了多种有机胺改性的中孔炭基CO2吸附剂。采用氮气吸附、热重和傅里叶红外法测定了吸附剂的物理化学特性,并研究了有机胺的种类对CO2吸附性能的影响。结果表明:中孔炭基固态胺对CO2的吸附受扩散控制,提高温度能够促进CO2扩散,增大吸附容量;小分子的胺类物质乙醇胺(MEA),二乙醇胺(DEA),二乙烯三胺(DETA)热稳定性较差,CO2吸附容量偏低;低分子量聚乙烯亚胺(PEI,分子量600)具有最优的循环吸附性能,吸附量达到190 mg/g;四乙烯五胺(TEPA)的吸附容量最大,为208mg/g,但是循环性较差,可通过加入小分子交联剂环氧氯丙烷提高其循环吸附性能。
Mesoporous carbons （MCs） with high pore volume were synthesized via a combined sol-gel process and hard templating method using resorcinol and formaldehyde as carbon precursor and silica nanoparticles as hard template. Amine-loaded mesoporous carbon sorbents were obtained by wet impregnation with different amines. The physicochemical properties of the materials were characterized by nitrogen adsorption, thermogravimetry （TG） and Fourier Transform Infrared Spectroscopy （FTIR）. The effect of the type of amine on the CO2 sorption performance was investigated. The results showed that the CO2 sorption over MC-based solid amine is limited by inner diffusion inside the amine. MCs impregnated with low molecule amines （MEA, DEA and DETA） had lower CO2 adsorption capacities, owing to their poor thermal stability. The low molecular weight PEI （600） loaded MCs exhibited best cycling per- formance with the CO2 sorption capacity of 190 mg/g. The TEPA loaded MCs exhibited the highest sorption capacity of 208 mg/g, however their cycling performance was poor. By using epoxy chloropropane as the cross-linking agent to modify TEPA, the sorbents showed remarkable improvement in cycling performance.