Influence of promoting Ni-based catalysts with ruthenium in the dry reforming of polypropylene plastics for syngas production

The catalytic dry reforming of plastic waste is conducted in two-stage fixed bed reactors. The pyrolysis of polypropylene plastics occurs in the first reactor, and the pyrolyzed gases undergo a reforming reaction with carbon dioxide over a catalyst in the second reactor. The wet impregnation method is used to synthesize Ru-Ni/Al2O3 catalysts, which are then calcined and reduced at 800 degrees C. The results show that as the nickel loading increases, the syngas production increases. Promoting the catalyst with a small quantity of ruthenium significantly improves the plastic conversion into syngas. The dry reforming of poly-propylene over 1Ru15Ni/Al2O3 catalyst resulted in the maximum syngas yield (159 mmolsyngas/gPP) at a 2:1 plastic to catalyst ratio. The catalytic dry reforming of plastics is promising for the production of synthesis gas. (c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.