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380830 
Journal Article 
Synthesis of Mesoporous Cu-Mn-Al2O3 Materials and Their Applications to Preferential Catalytic Oxidation of CO in a Hydrogen-rich Stream 
Fang, DR; Ren, WZ; Liu, ZM; Xu, XF; Zhang, HM; Liao, WP 
2010 
Yes 
Chemical Research in Chinese Universities
ISSN: 1005-9040 
26 
1 
105-109 
English 
A series of mesoporous Cu-Mn-Al2O3(CMA) materials was synthesized at moderate temperature and their structures were characterized by XRD. N-2 physical adsorption and TPR techniques. It was found that using metal complex ion[Cu(NH3)(4)(2+)-Mn(NH3)(6)(2+)] as raw materials is easier to form good-structure mesoporous Cu-Mn-Al2O3 materials than using its nitrate salt [Cu(NO3)(2)-Mn(NO3)(2)]. The TPR tests. results indicate that CuO and MnO. were homogeneously dispersed in the mesoporous materials. Their catalytic application to preferential catalytic oxidation of CO in a hydrogen-rich stream was studied. The activity varies in the order of CMA(1:1, molar ratio)> CMA(1:2)>CMA(2:1)>CMA(CP)>CMA(1:0)approximate to CMA(0:1). The CMA(1:0) and CMA(0:1) have lower activity compared to other samples, implying that there existed coordination effect between Cu-Mn in the samples. The selectivity varied in the order or CMA(0:1)>= CMA(1:2)>CMA(1:1)>CMA(2:1)>CMA(1:0) at higher temperature (>= 120 degrees C), indicating that increasing the Cu content enhanced the conversion of H-2. The sample CMA(CP) made by coprecipitation method has a lower CO oxidation activity and selectivity than its counter-parts of mesoporous Cu-Mn-Al2O3 materials[CMA(1:2)], this attributed to the lower surface area of the former and poor interaction of CuO with MnOx.