制备方法对Fe_2O_3/Al_2O_3-ZrO_2在乙苯脱氢反应中催化性能的影响  

Effect of preparation methods on the catalytic properties of Fe_2O_3/Al_2O_3-ZrO_2 for ethylbenzene dehydrogenation

作　　者：张淑娇[1,2] 李文英[1,2] 李晓红[1,2] 

机构地区：[1]太原理工大学煤科学与技术教育部重点实验室,山西太原030024 [2]煤科学与技术省部共建国家重点实验室培育基地,山西太原030024

出　　处：《燃料化学学报》2015年第4期437-441,共5页Journal of Fuel Chemistry and Technology

基　　金：山西省归国留学人员科技项目(2012-3);高等学校博士学科点专项科研基金(20121402110016)

摘　　要：为提高含铁催化剂的脱氢活性,采用浸渍法和一步沉淀法制备了Fe、Al和Zr含量相同的F4AZ10-imp和F4AZ10-pre催化剂,在550℃考察了其在乙苯CO2氧化脱氢制苯乙烯反应过程中的催化性能,并结合XRD、N2-吸附、NH3-TPD、CO2-TPD和H2-TPR等表征手段对催化剂进行了分析。结果表明,与浸渍法相比,一步沉淀法制备的催化剂更有利于活性组分Fe2O3在催化剂表面的分散及反应物CO2的转化。To improve the catalytic performan ce of iron-ba sed catalysts for de hydrogena tion of ethylbenzene with CO2 , two samples, F4AZ10-imp and F4AZ10-pre, with thes ame contents of Fe, Al and Zr were prepared by the impregnation method and one-step precipitation method.The catalytic perf ormance of these two samp les for th e dehydrogenation of eth ylbenzene with CO2 wast este d at 550 ℃.Both the samples are characterized with XRD, NH3-TPD,CO 2-TPD and H2 -TPR techniques andN 2 sorp tion exper iment.It was shown that the preparation methods had a great effect on the catalytic performance.Compared to the impregnation method, the one-step precipitation method gav e a more active catalyst because of a higher dispersiono f active Fe2 O3 on the catalyst surfa ce and a stronger activation of CO2 .

关 键 词：制备方法 Fe2O3/Al2O3-ZrO2 催化剂 乙苯 二氧化碳 脱氢反应 

分 类 号：O643.3[理学—物理化学]