Title of article :
Catalytic combustion of methane over PdO supported on Mg-modified alumina
Author/Authors :
Yang، نويسنده , , Le-fu and Shi، نويسنده , , Chun-kai and He، نويسنده , , Xiang-e and Cai، نويسنده , , Jun-xiu، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2002
Pages :
9
From page :
117
To page :
125
Abstract :
Mg-modified alumina supports were prepared in both impregnation and co-precipitation routes, and Pd catalyst was finally obtained by incipient wetness method. Catalysts supported on different oxides were characterized by means of conventional techniques like XRD, laser Raman, CO-pulse, N2-adsorption, etc. It was demonstrated that dispersion of Pd component on unit BET surface area increased and PdO active phase crystallized well on account of the formation of MgAl2O4 spinel. Combined with temperature programmed reaction techniques (O2-TPD, CH4-TPR, H2-TPSR), three kinds of PdO species were identified on spinel support. Moreover, a moderate interaction between MgAl2O4 spinel oxide support and PdO was discovered and an epitaxy formation mechanism of the crystalline PdO species was suggested. For this novel PdO species satisfied the requirement of structural particularity for reaction with methane, it could serve as the active phase for methane combustion. As a result, prominent improvement on ignition performance was observed in following catalytic activity test.
Keywords :
Supported Pd catalyst , spinel , Interaction with support , structure sensitivity , Methane combustion
Journal title :
Applied Catalysis B: Environmental
Serial Year :
2002
Journal title :
Applied Catalysis B: Environmental
Record number :
1445675
Link To Document :
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