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Effects of Doping Metal on the Carburization of MoO3/Al2O3
Zhu Quanli, Zhao Jun, Zhang Bin, Ji Shengfu,Yang Jian,Wang Jiaxin,Wang Hanqing*
Author NameAffiliationE-mail
Zhu Quanli State Key Laboratory for Oxo Synthesis and Selective OxidationLanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000  
Zhao Jun State Key Laboratory for Oxo Synthesis and Selective OxidationLanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000  
Zhang Bin State Key Laboratory for Oxo Synthesis and Selective OxidationLanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000  
Ji Shengfu State Key Laboratory for Oxo Synthesis and Selective OxidationLanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000  
Yang Jian State Key Laboratory for Oxo Synthesis and Selective OxidationLanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000  
Wang Jiaxin State Key Laboratory for Oxo Synthesis and Selective OxidationLanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000  
Wang Hanqing* 中国科学院兰州化学物理研究所,羰基合成与选择氧化国家重点实验室,兰州,730000 whqwt@hotmail.com 
Abstract:
The investigation on MoO3 / Al2O3 sample or its modifiers with nickel,copper or potassium was performed using temperature programmed surface reaction(TPSR)technique and measurements of BET surface area. The results indicate that addition of nickel promotes the methane reduction,further the carburization,of MoO3,and addition of nickel also promotes the activation of methane over the surface of oxycarbide or carbide due to the increase of active sites per unit area and intrinsic activity of catalytic centers. This is favorable to the conversion of methane. The addition of copper promotes the methane reduction,further the carburization,of MoO3 to some extent,while the introduction of copper also accelerates the sintering of catalyst to a degree. Thus copper doped carbide catalyst exhibits its exceptionally catalytic performance. However,potassium prevents the MoO3 from reduction with methane,which is unfavorable to the carburization. Potassium also restrains methane from being activated over the surface of oxycarbide or carbide. MoO3 / Al2O3 doped with potassium is of lower specific area,which originates from its boosting sintering of catalyst. This caauses the inferior methane conversion over potassium doped carbide catalyst.
Key words:  TPSR,Oxycarbide,Carbide,BET,Methane
FundProject:
添加金属对MoO3/Al2O3 碳化过程的影响
朱全力,赵军,张兵,季生福,扬建,王嘉欣,汪汉卿*
摘要:
通过对镍、铜和钾改性的MoO3/Al2O3样品进行与甲烷的程序升温表面反应(CH4-TPSR)研究以及其碳化样品的BET测定,发现镍的添加对于甲烷还原以及碳化氧化钼具有促进作用,并对甲烷在碳氧化物或碳化物表面上的活化也具有促进作用,镍改性的碳化物样品具有较大的比表面和对甲烷比较高的本征活性;铜的添加对于甲烷还原以及碳化氧化钼稍有促进作用,对于甲烷在碳氧化物或碳化物表面上的活化稍有促进作用,但铜的引入也会加快催化剂的烧结;钾的添加对氧化钼被甲烷的还原以及碳化都不利,对于甲烷的活化也不利,钾的加入还会促使催化
关键词:  程序升温表面反应(TPSR)  碳氧化物  碳化物  BET  甲烷
DOI:10.1088/1674-0068/17/4/489-494
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