EFFECT OF SUPPORT COMPOSITION ON THE MECHANICAL AND CATALYTIC PROPERTIES OF NICKEL CATALYSTS FOR SYNGAS METHANATION

摘要

The conversion of biomass to energy carriers like CH4 through CO methanation reaction is a desirablernroute towards development of efficient energy production/conversion systems. The CO methanation reaction isrnhighly exothermic and due to the high CO partial pressure in the inlet of the reactor, huge amounts of heat should bernremoved. For this reason, gas-solid fluidized-bed reactors have been applied in recent years. In this work nickel-basedrncatalysts supported on mechanically stable materials were tested for CO methanation. The influence of slicicarnnanoparticles and diatomite on the mechanical stability was studied. Silica nanoparticles significantly improve thernmechanical stability on the final catalyst, but also has a negative effect on the activity for CO methanation. Thernresults show that catalytic and attrition resistance properties make of Al_2O_3 the best support material so far.