Two major greenhouse gases of CO2 and CH4 were converted into valuable synthesis gases of CO and H2 through a reduction step of a chemical looping process, while producing a heat energy during an oxidation step. By suppling a nonstoichiometric CO2 and CH4 mixture during the reduction step, the H2/CO ratio of 2 can be achieved while inhibiting a coke formation. Carbon deposit was further decreased by promoting 1% of nickel on Fe2O3/Al2O3 to derive Ni aluminate formation. Highly dispersed CeO2 on the mesoporous Al2O3 also suppressed a CH4 decomposition with the decreased coke formation. By adjusting a real time CO2/CH4 ratio with the amount of oxygen resource in an oxygen carrier, the produced H2/CO ratio of 2 was stably maintained even in a fixed bed reactor system.

Combined partial oxidation and CO2 dry reforming of methane in an iron oxide-based chemical looping process

256th National Meeting (2018)

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