Effect of carbon dioxide on the reaction performance of partial oxidation of methane over a LiLaNiO/gamma-Al2O3 catalyst

Effect of CO2 on the reaction performance of the partial oxidation of metha ne over a LiLaNiO/gamma-Al2O3 catalyst was investigated with a fixed-bed fl ow microreactor, XRD and UVRRS, etc. By adding CO2 to the partial oxidation of methane, CH4 and CO2 conversions change slightly, while the H-2/CO rati o obviously alters. When combining the exothermic partial oxidation reactio n with the endothermic carbon dioxide reforming process, the catalyst bed t emperature profiles vary considerably, and the temperature of the hot spots in the catalyst bed reduce significantly, compared with that of the partia l oxidation of methane. The 100h Life-test results indicate that the LiLaNi O/gamma-Al2O3 catalyst has good thermal stability, stable crystal phase and excellent carbon deposition resistance during the natural gas-CO2-O-2 reac tion at 850 degrees C. (C) 2000 Elsevier Science B.V. All rights reserved.