摘要
利用浸渍法制备系列负载型Fe-Cu-K-Ce催化剂,并用其进行了CO2加氢合成低碳烯烃研究。考察了不同的载体,载体上活性组分Fe、Cu、K、Ce负载量,焙烧温度,以及反应温度、空速、压力等工艺条件对催化剂活性的影响。结果表明,以MgO-ZSM-5为载体,w(Fe)为15%,且活性组分n(Fe)∶n(Cu)∶n(K)∶n(Ce)为100∶20∶8∶8,在773K下空气中焙烧制得的催化剂在623K、1.0MPa、空速1200h-1反应条件下活性最高,此时CO2转化率可达60%以上,低碳烯烃选择性可达20%以上。对催化剂进行了CO2-TPD、XRD和TEM表征分析。
Hydrogenation of carbon dioxide to light olefins over the supported Fe-Cu-K-Ce catalysts prepared by impregnation method was studied.The effects of supports,loading contents of Fe,Cu,K and Ce on the support,calcination temperature of the catalyst,and the reaction conditions of temperature,space velocity and pressure on the activity of the catalysts were examined.The results showed that the MgO-ZSM-5 supported Fe-Cu-K-Ce catalyst with 15% by mass Fe and the Fe/Cu/K/Ce molar ratio of 100：20： 8：8 and calcined in air at 773K exhibited the best catalytic activity under reaction temperature of 623K,pressure of 1.0MPa and GHSV of 1200h-1,with a CO2 conversion of over 60% and a selectivity to light olefins of over 20%.The catalysts were characterized by CO2-TPD,XRD and TEM.
出处
《天然气化工—C1化学与化工》
CAS
CSCD
北大核心
2013年第3期34-38,47,共6页
Natural Gas Chemical Industry
基金
吉林省科技厅应用基础项目(项目号:201115145)
吉林省教育厅应用基础项目(项目号:吉教科合字[2012]第112号)
关键词
铁基催化剂
二氧化碳
加氢
低碳烯烃
载体
反应条件
iron-based catalyst
carbon dioxide
hydrogenation
light olefin
support
reaction condition
