摘要
在氮气保护及程序控温条件下,制备了具有一定孔隙的炭纤维掺杂的乙苯脱氢催化剂。通过对比表面积、孔隙度的测定,发现微孔数量随炭纤维加入量的增加而增加,炭纤维催化剂得到了活化。催化剂的扫描电镜分析、侧压强度及抗拉强度测试证明,炭纤维使催化剂的机械强度明显提高。乙苯脱氢实验表明,苯乙烯选择性随炭纤维的加量增大;乙苯的转化率则存在最大值。考虑机械强度与催化活性,加入6%炭纤维的催化剂最佳。
Porous catalysts with carbon fiber for ethylbenzene dehydrogenation were prepared the protection of nitrogen by programmed temperature controlling. It was found that the number of micro-porous was increasing with carbon fiber content by specific surface area and porosity determination. Scanning electronic microscopy analysis, the side pressure and the tensile strength tests provided that mechanical strength of catalysts were obviously enhanced. The results of ethylbenzene dehydrogenation experiments showed that selectivity of styrene increased with the increasing of carbon fiber content; and conversion of ethylbenzene had a maximum. In comprehensive consideration of the mechanical intensity and catalytic activity, the catalyst with 6% carbon fiber was optimum formulation.
出处
《化学反应工程与工艺》
EI
CAS
CSCD
北大核心
2006年第3期275-279,共5页
Chemical Reaction Engineering and Technology
关键词
乙苯
脱氢催化剂
炭纤维
机械强度
比表面积
ethylbenzene
dehydrogenation catalyst
carbon fiber
mechanical strength
specific surface area
