Effect of Pt on Zn-Free Cu-Al Catalysts for Methanol Steam Reforming to Produce Hydrogen

Document Type: Research Article

Authors

Hydrogen and Fuel Cell Research Laboratory, Department of Chemical Engineering, Faculty of Engineering, University of Kashan, Kashan, I.R. IRAN

Abstract

Steam reforming of methanol can be considered as an attractive reaction aiming at hydrogen production for PEM fuel cells. Although Cu/Al-contained catalysts are considerably evaluated in this reaction, further evaluation is essential to evaluate the impact of some promoters like Pt in order to find a comprehensively optimized catalyst. Pt promoter is employed with different methods in this study. Firstly, the amount of Cu loading in Cu/Al ratio is optimized via coprecipitation method. The sample containing 30% wt. of Cu exhibits better performance with methanol conversion of 70% and CO selectivity of 0.44%. Besides, impregnating a different amount of Pt onto Al2O3 reveals an inadequate potential for this reaction. In contrary, doping Pt into Cu/Al catalyst increases the methanol conversion as high as 81% and CO selectivity reaches to approximately zero at 270 °C. In addition, using a dual-bed reactor including Cu/Al and Pt/Al2O3 catalyst displays a relatively satisfactory performance by which the conversion and selectivity are found 83.7% and 1.5%, respectively. In this study, analyses of X-Ray Diffraction, Scanning Electron Microscopy, and BET surface area are used to characterize the synthesized catalysts. 

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