Syngas production from methane reforming with CO 2/H 2O and O 2 over NiO–MgO solid solution catalyst in fluidized bed reactors

Abstract

Catalyst performance of NiO–MgO solid solution catalysts for methane reforming with CO 2 and H 2O in the presence of oxygen using fluidized and fixed bed reactors under atmospheric and pressurized conditions was investigated. Especially, methane and CO 2 conversion in the fluidized bed reactor in methane reforming with CO 2 and O 2 was higher than those in the fixed bed reactor over Ni 0.15Mg 0.85O catalyst under 1.0 MPa. In contrast, conversion levels in the fluidized and fixed bed reactor were almost the same over MgO-supported Ni and Pt catalysts. It is suggested that the promoting effect of catalyst fluidization on the activity is related to the catalyst reducibility. On a catalyst with suitable reducibility, the oxidized and deactivated catalyst can be reduced with the produced syngas and the reforming activity regenerates in the fluidized bed reactor during the catalyst fluidization. In addition, the catalyst fluidization inhibited the carbon deposition.