Partial oxidation of methane to synthesis gas over corundum supported mixed oxides: One channel studies

Catalytic partial oxidation of methane (POM) over the monolithic catalyst LaNiOx/CeO2-ZrO2/α-Al2O3 has been studied. Experiments were conducted with one channel of a monolith at a varied channel length, contact time (∼1-6 ms) and temperature using the diluted gas mixture (1% CH4 + 0.5% O2 in He). At increasing temperature and contact time, CO selectivity rises within the whole temperature range whereas the contact time dependence of H2/CO ratio varies with the temperature. These results support the POM reaction scheme including primary formation of CO and H2 followed by their oxidation in the presence of gas-phase O2. Steam and dry methane reforming reactions occur in the part of monolithic channel where oxygen is absent, thus increasing syngas yield.