CO_2 reforming of methane combined with steam reforming or partial oxidation of methane to syngas over NdCoO_3 perovskite-type mixed metal-oxide catalyst

摘要

CO_2 reforming with simultaneous steam reforming or partial oxidation of methane to syngas over NdCoO_3 perovskite-type mixed metal oxide catalyst (prereduced by H_2) at different process conditions has been investigated. In the simultaneous CO_2 and steam reforming, the conversion of methane and H_2O and also the H_2/CO product ratio are strongly influenced by the CO_2/H_2O feed-ratio. In the simultaneous CO_2 reforming and partial oxidation of methane, the conversion of methane and CO_2, H_2 selectivity and the net heat of reaction are strongly influenced by the process parameters (viz. temperature, space velocity and relative concentration of O_2 in the feed). In both cases, no carbon deposition on the catalyst was observed. The reduced NdCoO_3 perovskite-type mixed-oxide catalyst (Co dispersed on Nd_2O_3) is a highly promising catalyst for carbon-free CO_2 reforming combined with steam reforming or partial oxidation of methane to syngas.