Combined catalytic partial oxidation and CO2 reforming of methane over supported cobalt catalysts

摘要: The combined partial oxidation and CO2 reforming of methane to synthesis gas was investigated over the reduced Co/MgO, Co/CaO, Co/SiO2 catalysts. Only Co/MgO has proved be a highly efficient stable catalyst. It provided about 94–95% yields H2 CO at high space velocity 105 000 ml g−1 h−1 for feed ratios CH4/CO2/O2=4/2/1, without any deactivation period study 110 h. In contrast, Co/CaO no activity formation CO. structure reducibility calcined catalysts were examined using X-ray diffraction temperature-programmed reduction, respectively. A solid solution CoO MgO, which difficult reduce, identified in 800 °C MgO-supported strong interactions induced by are responsible its superior reaction. effects reaction temperature, velocity, O2/CO2 ratio gases (while keeping C/O constant 1/1) H2/CO product increased with increasing feed.