Record number :
Title of article :
Selective removal of CO from hydrogen-rich stream over CuO/CexSn1−xO2–Al2O3 catalysts
Author/Authors :
Chen، نويسنده , , Yin-Zu and Liaw، نويسنده , , Biing-Jye and Wang، نويسنده , , Jung-Man and Huang، نويسنده , , Ching-Tsuen، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Pages :
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Abstract :
The solid solutions of CexSn1−xO2 incorporated with alumina to form CexSn1−xO2–Al2O3 mixed oxides, by the suspension/co-precipitation method, were used to prepare CuO/CexSn1−xO2–Al2O3 catalysts for the selective oxidation of CO in excess hydrogen. Incorporating Al2O3 increased the dispersion of CexSn1−xO2, but did not change their main structures and did not weaken their redox properties. Doping Sn4+ into CeO2 increased the mobility of lattice oxygen and enhanced the activity of the 7%CuO/CexSn1−xO2–Al2O3 catalyst in the selective oxidation of CO. The selective oxidation of CO was weakened as the doped fraction of Sn4+ exceeded 0.5. Incorporating appropriate amounts of Sn4+ and Al2O3 could obtain good candidates 7%CuO/CexSn1−xO2–Al2O3(20%), 1–x=0.1–0.5, for a preferential oxidation (PROX) unit in a polymer electrolyte membrane fuel cell system for removing CO. Its activity was comparable with, and its selectivity was much larger than, that of the noble catalyst 5%Pt/Al2O3.
Keywords :
CexSn1?xO2–Al2O3 mixed oxides , CO , Selective oxidation , CeO2 oxide , CuO catalyst
Journal title :
International Journal of Hydrogen Energy
Link To Document :