黏结剂对Fe基乙苯脱氢催化剂性能的影响

Effect of binders on Fe-based ethylbenzene dehydrogenation catalysts′ performance

采用溶胶-凝胶法制备了含黏结剂的系列Fe基乙苯脱氢催化剂,并进行了结构表征,考察了4种黏结剂(高岭土、水泥、二氧化硅、氧化铝)对Fe基催化剂耐磨损性能和乙苯脱氢反应性能的影响。结果表明:与未添加黏结剂的催化剂相比,高岭土和氧化铝可提高催化剂的比表面积、孔容和孔径,水泥和二氧化硅会降低催化剂比表面积;加入黏结剂的4种催化剂耐磨损性能均有改善,加入氧化铝的催化剂耐磨损性能最佳,且乙苯脱氢活性和苯乙烯选择性最高。

A series of Fe-based catalysts containing four binders(including kaolin,cement,silica and alumina)for ethylbenzene dehydrogenation reaction were prepared and characterized,and the effects of four binders on attrition resistance and ethylbenzene dehydrogenation of Fe-based catalyst were investigated.The results showed that compared with the catalyst without binder,adding kaolin and alumina could improve catalyst′s specific surface area,while adding cement and silica could greatly reduce catalyst′s specific surface area,and attrition resistance of the four kinds of catalysts containing binder were all improved,catalyst with alumina had the highest improvement.Among the four binder-containing catalysts,the catalyst with alumina had the highest ethylbenzene dehydrogenation activity and styrene selectivity.