Methane Decomposition over Ni/α-Al_2O_3 Promoted by La_2O_3 and CeO_2  

作　　者：PengboJiang YongchenShang TiexinCheng YingliBi KeyingShi ShuquanWei GuolinXu KaijiZhen 

机构地区：[1]CollegeofChemistry,JilinUniversity,Changchun130023,China [2]DepartmentofChemistry,HarbinNormalUniversity,Harbin150080,China

出　　处：《Journal of Natural Gas Chemistry》2003年第3期183-188,共6页天然气化学杂志（英文版）

摘　　要：The decomposition of methane on Ni/α-Al_2O_3 modified by La_2O_3 and CeO_2with different contents has been investigated and the ralationship between methane decomposition andremoval of carbon by CO_2 over these catalyst has also been studied by pulse-chromatography. Thecatalysts were characterized by TPR and XRD. It was shown that Ni/α-Al_2O_3 could be promoted byadding La_2O_3, and the carbon species produced over this catalyst was activated and eliminated byCO_2. But CeO_2 would suppress the decomposition of methane over Ni crystallite. Both La_2O_3 andCeO_2 can inhibit aggregation of the Ni particles. Decomposition of methane over the Ni-basedcatalysts is structure sensitive to a certain extent.The decomposition of methane on Ni/α-Al_2O_3 modified by La_2O_3 and CeO_2with different contents has been investigated and the ralationship between methane decomposition andremoval of carbon by CO_2 over these catalyst has also been studied by pulse-chromatography. Thecatalysts were characterized by TPR and XRD. It was shown that Ni/α-Al_2O_3 could be promoted byadding La_2O_3, and the carbon species produced over this catalyst was activated and eliminated byCO_2. But CeO_2 would suppress the decomposition of methane over Ni crystallite. Both La_2O_3 andCeO_2 can inhibit aggregation of the Ni particles. Decomposition of methane over the Ni-basedcatalysts is structure sensitive to a certain extent.

关 键 词：METHANE carbon dioxide NICKEL LANTHANA CERIA 

分 类 号：TE646[石油与天然气工程—油气加工工程]