Abstract
Partial oxidation (POM) or dry reforming (DRM) of methane are alternatives to steam reforming of methane (SRM) yielding H2 and CO. This manuscript demonstrates the potential of catalysts containing tiny amounts (0.005 wt%) of well-defined Rh, Ru or Pt nanoparticles (NP) supported on Al2O3, La2O3-ZrO2, TiO2, SiO2, Al2O3-SiO2 or MgO-Al2O3 for POM, DRM, POM-DRM or DRM-SRM at 1073 K. Those containing Rh NP on Al2O3, Al2O3-SiO2 or MgO-Al2O3 reveal close to equilibrium conversion in POM/DRM at a contact time of 0.31 s⋅gcat⋅mL−1. Turnover frequency of CH4 conversion depends on the ability of metal to react with gas-phase oxygen. CO and CO2 are primary products of CH4 conversion in POM, with the rate of CO formation exceeding that of CO2. CO is further oxidized to CO2 until O2 is completely consumed. H2 is formed independently on CO in downstream-located catalyst layer where oxygen conversion is complete.
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