Effect of addition of CaO on Ni/Al2O3 catalysts over CO2 reforming of methane

The Ni/gamma -Al2O3 catalyst was modified by CaO in order to improve the th ermal stability and the carbon deposition resistance during the CO, reformi ng of methane to syngas reaction. The catalytic performance, thermal stabil ity, structure. dispersivity of nickel and carbon deposition of the modifie d and unmodified catalysts were investigated by a series of characterizatio n techniques (X-ray diffraction (XRD). BET, H-2 chemisorption, temperature programmed reduction (TPR) and flow-reaction). Results showed that catalyst s modified with CaO improve their stability better than the nickel-based ca talysts. (C) 2001 Elsevier Science B.V. All rights reserved.