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Cu-Co Composite Oxides Supported on Multi-walled Carbon Nanotubes for Catalytic Removal of CO in a H2-rich Stream
Ning Liu,Yu-xian Gao,Wen-dong Wang*,Wei-xin Huang
Author NameAffiliationE-mail
Ning Liu CAS Key Laboratory of Materials for Energy Conversion and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China  
Yu-xian Gao CAS Key Laboratory of Materials for Energy Conversion and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China  
Wen-dong Wang* CAS Key Laboratory of Materials for Energy Conversion and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China wangwd@ustc.edu.cn 
Wei-xin Huang CAS Key Laboratory of Materials for Energy Conversion and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China  
Abstract:
Multi-walled carbon nanotubes (MWCNT) supported Cu-Co composite oxides catalysts were prepared by an ultrasonication treatment-aided impregnation method. The structure prop-erties of the catalysts were characterized by XRD, TEM, H2-TPR, XPS and Raman spectra, indicating the strong interactions between Cu and Co mixed oxides as well as between metal oxides and MWCNT support. The catalytic performance of CO removal in a H2-rich stream was examined. In contrast to the single Cu and Co catalyst, the unique performance was ob-served for Cu-Co composite catalysts, which features an unusual reaction pathway through the combination of CO preferential oxidation and CO methanation especially at high reac-tion temperature. The optimal catalyst with Cu/Co ratio of 1/8 can achieve the complete CO conversion in a wider temperature range of 150-250 oC under the space velocity as high as 120 L/(h·g), which demonstrates a promising catalyst for the e ective CO removal in a H2-rich stream.
Key words:  Copper, Cobalt, Carbon nanotube, CO preferential oxidation, CO methanation
FundProject:
碳纳米管负载Cu-Co复合氧化物的富氢气氛中CO催化消除
刘宁,高玉仙,汪文栋*,黄伟新
摘要:
采用超声处理辅助浸渍法制备了多壁碳纳米管负载的Cu-Co复合氧化物催化剂. 利用XRD、TEM、H2-TPR、XPS和Raman光谱等表征了催化剂的结构性质. 在Cu和Co氧化物以及金属氧化物与碳纳米管载体间存在强相互作用. 催化剂在富氢气氛中CO催化消除反应中,与单一Cu或Co催化剂相比,Cu-Co复合氧化物催化剂表现出独特的反应特性,特别是在较高反应温度下可同时结合CO优先氧化和CO甲烷化的反应途径来实现高效CO消除. 当Cu/Co比为1/8时活性最优,可以实现在150~250 o和高反应空速 (120 L/(h·g))富氢气氛中CO的完全消除.
关键词:  Cu,Co,碳纳米管,CO优先氧化,CO甲烷化
DOI:10.1063/1674-0068/27/05/523-529
分类号: