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Characterization and Catalytic Behavior of Nano Pt/MgO Catalysts
Min Yang*, Helmut Papp
Author NameAffiliationE-mail
Min Yang* School of Environmental and Chemical Engineering, Dalian Jiaotong University, Dalian 116028, China; Institute of Technical Chemistry, University of Leipzig, 04103 Leipzig, Germany minyang@djtu.edu.cn 
Helmut Papp Institute of Technical Chemistry, University of Leipzig, 04103 Leipzig, Germany  
Abstract:
"Pt/MgO catalysts were prepared by using wet impregnation method. X-ray diffraction, transmission electron microcopy (TEM), electron spectroscopy for chemical analysis, and temperature programmed surface reaction (TPSR) were used to characterize the calcined and used catalysts. Partial Oxidation of Methane (POM) to synthesis gas was carried out in a fixed bed micro-reactor to test the catalytic activity. TEM images revealed that Pt particles have the size of less than 10 nm, the size of the support MgO is about 50-200 nm. At 800 oC, the Pt/MgO catalyst exhibited a very high activity and stability for POM reaction. Both the conversion of methane and selectivities to CO and H2 remained almost constant up to 120 h. The dispersed Pt existed in the metallic state. The state and the dispersion of active Pt and the structure of support MgO were very stable, together with the high ability to resist carbon deposition, made the catalysts show a very high stability for POM under stoichiometric reaction conditions."
Key words:  Nanometer Pt/MgO catalysts, Characterization, Carbon deposition, Stability
FundProject:
纳米Pt/MgO催化剂的表征和催化性能
杨民*,Helmut Papp
摘要:
"用浸渍法制备了Pt/MgO催化剂,采用X射线衍射、X射线光电子能谱、透射电子显微镜和程序升温表面反应等技术对反应前后的催化剂进行了表征.甲烷部分氧化制备合成气的反应被用来考察催化剂的催化活性和稳定性.TEM结果显示活性组分Pt粒子的尺寸小于10 nm,而载体MgO的晶粒大小在50~200 nm.在固定床微反应器上进行.在800 ℃时,Pt/MgO催化剂表现了非常高的POM催化活性和稳定性,甲烷转化率和合成气的选择性在120 h内保持稳定.活性组分Pt以金属状态存在于载体的表面上,其存在状态和分散状态都很
关键词:  纳米Pt/MgO催化剂,表征,积碳,稳定性
DOI:10.1088/1674-0068/20/06/690-696
分类号: