Hydrogen Production from Dry-Reforming of Biogas over Pt/Mg1-xNixO Catalysts

Dry reforming of biogas carried out over Pt/Mg1-xNixO catalysts, where x= 0, 0.03, 0.07, and 0.15 with 1 wt% Pt for each, prepared by the co-precipitation method from aqueous solution of Ni(NO3)2.6H2O and Mg(NO3)2.6H2O using K2CO3, then the platinum(II)acetylacetonate impregnated on MgO-NiO. The synthesized catalysts analyzed by XRD, FT-IR, XRF, XPS, BET and TEM. at 700 oC, the catalysts reduced by H2 prior to each reaction. The order of conversions of CO2 and CH4 at 900 oC of the reduced catalysts after being on the stream for 200 h was as follows: Pt/Mg0.85Ni0.15O > Pt/Mg0.93Ni0.07O > Pt/Mg0.97Ni0.03O > Pt/MgO with a CH4:CO2 mole ratio of 2:1 that displayed the best resistance to deactivation by carbon formation and formed high selectivity of H2 and CO. The dry reforming reaction was also carried out with the presence of low concentrations of oxygen (1.25%) flow and showed an enhancement in the conversion of CH4