Carbon dioxide reforming of methane by solid state synthesis supported catalysts

摘要

Ni catalyst supported on MgAl_2O_4 mixed oxide was prepared by solid state synthesis, co-precipitation and wet impregnation. The mixed oxide support was synthesized by the solid state synthesis at room temperature (MgAl_2O_4~(solid)) and co-precipitation method (MgAl_2O_4~(cop)) respectively, followed by wet impregnation for Ni loading. The catalytic performances of these samples were compared in carbon dioxide reforming of methane at 700 ℃. The results showed that the catalyst Ni/MgAl_O_4~(solid) with mixed oxide support prepared by solid state synthesis greatly affected the properties and performance of the catalyst. The catalyst Ni/MgAl_2O_4~(solid) showed higher CO_2 and CH_4 conversion than the Ni/ MgAl_2O_4~(cop) catalyst with the support prepared by conventional co-precipitation method. In addition, the BET surface area of the catalyst Ni/MgAl_2O_4~(solid) was three times larger than the catalyst Ni/MgAl_2O_4~(cop).