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个人信息Personal Information
教授
博士生导师
硕士生导师
任职 : 大连理工大学成都研究院院长
性别：男
毕业院校：中科院大连化学物理研究所
学位：博士
所在单位：化工学院
学科：化学工艺. 物理化学. 功能材料化学与化工
办公地点：大连理工大学西部校区化工综合楼A401室
联系方式：辽宁省大连市高新区凌工路2号，邮编116024
电子邮箱：changhai@dlut.edu.cn
Catalytic Combustion of Methane over Pt-Ce Oxides under Scarce Oxygen Condition
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论文类型：期刊论文
发表时间：2016-03-02
发表刊物：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
收录刊物：SCIE、EI
卷号：55
期号：8
页面范围：2293-2301
ISSN号：0888-5885
摘要：Nanocrystalline Pt-Ce oxides were prepared by citric acid method and impregnation method, and then mounted on cordierites to investigate the catalytic behavior for methane oxidation under scarce oxygen environment. XRD, H-2-TPR, TEM, and XPS were employed to investigate the relationship between physicochemical characteristics and catalytic performances. Pt-CeO2 showed good activity for oxygen conversion in fuel rich condition, especially during extinction step, with a huge hysteresis loop. By varying the oxygen concentration, Pt-CeO2 catalysts were poisoned by oxygen along ignition, and the competitive adsorption of oxygen and methane inhibits the activation of methane. Owing to the interaction between Pt and CeO2, and a more homogeneous dispersion of Pt in CeO2 compared with that of Pt/CeO2 prepared by impregnation, Pt-CeO2 catalysts maintained high activity during calcination and pretreatments.