Synthesis Gas Production from Natural Gas on Supported Pt Catalysts

摘要

Auto-thermal reforming of methane, combining partial oxidation and reforming of methane with CO_2 or steam, was carried out with Pt/Al_2O_3, Pt/ZrO_2 and Pt/CeO_2 catalysts, in a temperature range of 300-900℃. The auto-thermal reforming occurs in two simultaneous stages, namely, total combustion of methane and reforming of the unconverted methane with steam and CO_2, with the O_2 conversion of 100% starting from 450℃. For combination with CO_2 reforming, the Pt/CeO_2 catalyst showed the lowest initial activity at 800℃, and the highest stability over 40 h on-stream. This catalyst also presented the best performance for the reaction with steam at 800℃. The higher resistance to coke formation of the catalyst supported on ceria is due to the metal-support interactions and the higher mobility of oxygen in the oxide lattice.