载体对Ni基催化剂活性和抗积炭性能的影响  

Effect of Support on Resistance to Carbon-deposition of Nickel-based Catalysts for CO_2 Reforming of CH_4

作　　者：黎先财[1] 胡全红[1] 王燕[1] 吴敏[1] 何琲[2] 

机构地区：[1]南昌大学化学系,江西南昌330031 [2]天津大学绿色合成与转化教育部重点实验室,天津300072

出　　处：《稀土》2009年第5期34-38,共5页Chinese Rare Earths

基　　金：江西省教育厅项目资助(赣教技字[2007]17号)

摘　　要：考察了载体对催化剂的活性和抗积炭性能的影响;并测定了催化剂上的积炭量;运用CO2-TPD、TPR、XPS和XRD等测试技术对催化剂进行表征,并与催化剂的抗积炭性能相关联。研究发现以钛酸钡为载体的镍基催化剂,其活性与抗积炭能力均优于Ni/γ-Al2O3,且加入助剂La后,其活性与抗积炭能力显著提高。这与催化剂的表面酸碱性、载体与活性组分间的相互作用、氧空位以及载体的结构有关。CO2 reforming of CH4 over nickel - based catalysts has been investigated using a fixed - bed reactor, the catalytic ac- tivity and amount of carbon species effects by support has been evaluated. Catalysts are characterized by CO2- TPD, TPR, XPS and XRD techniques, and correlated with carbon deposition resistance of the catalysts . It was found that BaTiO3 support can influence the activity and carbon deposition amounts; and with the addition of rare earth promoter, it can greatly improve the catalytic activity and exert a strong effect on the anticoking performance of the catalysts. It is related to the surface acidity, strong metal - support interac- tion,oxygen vacancy and the structure of the support.

关 键 词：重整 载体 催化剂 积炭 

分 类 号：O643.36[理学—物理化学]