POM反应中SiO2负载Ni基催化剂积/消炭效应的理解：理论和实验  

An Understanding on Carbon Deposition/Removal on SiO_2 Supported Ni-based Catalysts for POM:Theoretical and Experimental Investigations

作　　者：夏文生[1] 陈蓉芳[1] 王雅莉[1] 李琪[1] 翁维正[1] 万惠霖[1] 

机构地区：[1]厦门大学化学化工学院,固体表面物理化学国家重点实验室,醇醚酯化工清洁生产国家工程实验室,福建省理论与计算化学重点实验室,福建厦门361005

出　　处：《厦门大学学报（自然科学版）》2015年第5期726-729,共4页Journal of Xiamen University：Natural Science

基　　金：国家自然科学基金(21373169,21473144);国家重点基础研究发展计划(973计划)(2010CB732303);长江学者和创新团队发展计划(IRT_14R31)

摘　　要：针对甲烷部分氧化(partial oxidation of methane,POM)制合成气反应中SiO2负载Ni基催化剂表面易积炭的问题,从理论计算和实验研究的角度进行了探讨.理论计算结果表明,金属Ni粒径的减小可以降低表面积炭,而部分氧化的金属Ni可以提高表面消积炭的能力.实验结果表明,浸渍法制SiO2负载Ni基催化剂,在引入Y后,呈现出良好的POM稳定性.其原因为,Y以Y2O3形式存在,Ni的颗粒粒径减小,有助于提高金属表面的抗积炭和消积炭能力.In this work we have explored the issues upon carbon deposition on the silica supported Ni-based catalysts for partial oxidation of methane（POM）into syngas from both theoretical and experimental points of view.The calculation results predicted that the decreased size of Ni particles could reduce the carbon deposition on Ni surfaces,and partially oxidized Ni was helpful for carbon removal on the metal surfaces.Experimentally,Y doped Ni catalysts supported on silica prepared with impregnation methods showed good stability in POM reaction.These are attributed to the decreased sizes of Ni particles and the existence of Y in the form of Y2O3 at the evaluation condition of the catalysts for POM reaction,which improve the carbon resistance/removal ability of the surfaces.

关 键 词：SIO2 NI Y 甲烷部分氧化 积炭 

分 类 号：O64[理学—物理化学]