Abstract
Methane pyrolysis and steam reforming were studied over a series of nickel catalysts (Ni-Al2O3, Ni/MgO, and Ni/LiAlO2) under the same conditions (650-750°C, PCH4 = 0.001-0.03 MPa). Unlike heterogeneous reaction of pyrolysis, some of the steps of steam reforming of methane occur in the gas phase. When gasphase reactions were suppressed, the rate and activation energy of steam reforming are close to the corresponding kinetic characteristics for pyrolysis. Hypothetically, the rate-limiting step of the process is the dissociative adsorption of methane on nickel in this case.
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