Preparation Of Ni-based Catalyst And Studies On CH₄/CO₂ Reforming To Syngas

The reforming of methane with carbon dioxide, two greenhouse gases, to produce synthesis gas (CO and H₂) has received significant attention in recent years. CH4/CO2 reforming can get synthesis gas with a low H₂: CO ratio (≦1), which is more suitable for the production of formaldehyde, polycarbonate or methanol. Although CH4/CO2 reforming concept has environment benefits and economic advantages, there are only a few commercial processes based on the CH4/CO2 reforming reaction. Nickel is more widely to be used as a catalyst, but the major obstacle for commercialization of the CH4/CO2 reforming over Ni-based catalyst is the rapid deactivation of catalysts induced by carbon deposition.In this paper, a new catalyst, La₂NiO₄/MCM-41 and a series of industrial Ni-based catalyst were prepared and their catalytic performances were investigated for CH4/CO2 reforming reaction in laboratory scale. The result revealed that the conversion of CH4 and CO2 were all above 90% at 850℃and did not observe remarkable deactivation after long time of reforming reaction. This means that all of these industrial catalysts could basically satisfy the demand of industrial reaction. Besides, these industrial catalysts were also investigated in the pilot plant scale.The properties of the catalysts were characterized by means of XRD, BET, TPR and TPO techniques and were compared to that of other catalyst, such as La₂NiO₄/γ-Al2O3.