Abstract
Catalytic partial oxidation of methane (POM) over the monolithic catalyst LaNiO x /CeO 2–ZrO 2/α-Al 2O 3 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% CH 4 + 0.5% O 2 in He). At increasing temperature and contact time, CO selectivity rises within the whole temperature range whereas the contact time dependence of H 2/CO ratio varies with the temperature. These results support the POM reaction scheme including primary formation of CO and H 2 followed by their oxidation in the presence of gas-phase O 2. Steam and dry methane reforming reactions occur in the part of monolithic channel where oxygen is absent, thus increasing syngas yield.
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