介孔碳片的合成及吸附脱硫性能

Synthesis and Adsorption Desulfurization Properties of Mesoporous Carbon Platelets

采用溶胶-凝胶法,以三嵌段共聚物聚氧化乙烯氧化丙烯氧化乙烯EO27-PO61-EO27(P104)为模板剂,蔗糖为共模板,正硅酸乙酯(TEOS)为硅源,在强酸性及无机盐存在条件下制备出介孔硅片,并以此为硬模板,通过浓硫酸处理的方法成功制备了介孔碳片。并采用扫描电子显微镜、N2吸附-脱附实验对合成的介孔碳片进行了表征。结果表明,所制备的碳材料为片状结构,BET比表面积和孔容分别为949m2/g和0.63cm3/g,平均孔径为4.1nm。并采用热分散法制备出了CuCl/介孔碳片吸附剂,通过静态吸附实验考查吸附剂对苯以及异辛烷中噻吩的吸附脱硫效果,脱硫率分别为64.0%与94.8%。与CuCl/介孔硅片吸附效果比较,结果表明CuCl/介孔碳片对噻吩的吸附效果要比CuCl/介孔硅片吸附效果好。

Mesoporous carbon platelets（MCP） were successfully synthesized by the carbonization of sulfuric-acid-treated the mesoporous silica platelets（MSP） which were prepared by using poly（ethylene oxides）-b-poly（propylene oxides）-b-poly（ethylene oxides）（PEO-PPO-PEO） triblock copolymer EO27-PO61-EO27（P104） as a template and sucrose as the co-template and tetraethylorthosilicate as the silica source in hydrochloric acid medium by sol-gel method.The synthesized samples were characterized by scanning electron microscopy（SEM）,nitrogen adsorption-desorption.The results show that the morphology of carbon materials is platelet.The BET surface and pore volume are 949 m2/g and 0.63 cm3/g respectively.The BJH mean pore diameter is 4.1 nm.The adsorbent CuCl/MCP was prepared with the thermal diffusion method.The adsorption desulfurization performance of the adsorbents for thiophene in benzene and isooctane was investigated via static adsorption experiments.The efficiency of desulfurization are 64.0% and 94.8% respectively.The results show that the desulfurization effect of CuCl/MCP adsorbent is more noticeable than CuCl/MSP.