铜改性炭气凝胶的制备及其脱硫性能  

The Preparation of Copper-Modified Carbon Aerogels and Their Desulfurization Performance

作　　者：金双玲 郭晨婷 张世敏 张睿 邵霞 金鸣林 

机构地区：[1]上海应用技术大学材料科学与工程学院,上海201418

出　　处：《上海应用技术学院学报（自然科学版）》2016年第2期141-146,163,共7页Journal of Shanghai Institute of Technology: Natural Science

基　　金：国家自然科学基金资助项目(U1332107);上海市一流学科建设资助项目(J201212);上海市地方高校能力建设资助项目(12160503600);上海应用技术学院引进人才基金资助项目(YJ2013-35);上海应用技术学院复合材料学科建设资助项目(10210Q140001)

摘　　要：采用溶胶-凝胶法,以间苯二酚、甲醛为有机相前驱体,无水碳酸钠作为催化剂制备得到炭气凝胶,通过研磨加热处理的方法将氯化亚铜负载到炭气凝胶上,得到铜改性炭气凝胶.利用X射线衍射和N2吸附-脱附法对样品的组成及孔结构分布进行表征.通过对模拟燃油中二苯并噻吩(DBT)的吸附考察样品的脱硫性能.结果表明,Cu负载量为5%(质量分数)的样品在非竞争和有苯竞争条件下的硫容最大,此时铜在炭基体上有较大的分散度,铜通过π络合作用增强了DBT与吸附剂的作用力,提高了吸附剂的选择性.但过多铜的引入使炭基体的孔道堵塞,吸附容量有所下降.Carbon aerogels were prepared by a sol-gel method,using resorcinol and formaldehyde as carbon sources,and sodium carbonate as catalyst.Copper-modified carbon aerogels were synthesized by grinding a mixture of cuprous chloride and carbon aerogels,followed by heat treatment.The composition and the pore structure distribution of the aerogels were characterized by XRD and N2 adsorption-desorption method.The desulfurization performance of the as-prepared adsorbents was evaluated by the selective adsorption of dibenzothiophene（DBT）as model sulfur compound from model fuels at ambient conditions.Results showed that the sample modified with 5wt.% copper had the highest sulfur capacity.At this point,the copper species on the carbon surface displayed a relatively large dispersion degree,which could formπ-complexation with DBT,resulting in the high capacity and selectivity.But more copper species led to the decrease of sulfur capacity due to the pore blockage.

关 键 词：炭气凝胶 铜改性 二苯并噻吩 吸附脱硫 

分 类 号：TQ427.26[化学工程]