2024 AIChE Annual Meeting
(569fs) Tri-Reforming of Biogas over a Ni-Alumina Catalyst Derived from MOF Precursors for the Production of Green Hydrogen
Regardless of these tri-reforming advantages, it lacks commercialization on the industrial scale due to the unavailability of active and stable catalysts. In this study, the new Ni-alumina catalyst (NAlM-53) derived from the metal-organic frameworks (MOF) precursors was synthesized by the wet impregnation method, characterized, and tested for biogas tri-reforming. The catalyst characterization study exhibited very promising properties, such as higher surface area (~212 m2/g), smaller nickel crystallite size (~14.5 nm), and strong metal-support interaction. The catalytic activity was evaluated in a tubular downflow reactor in the temperature range of 600-800°C at atmospheric pressure, using a simulated biogas containing ~67 vol.% CH4 and ~33 vol.% CO2, without the presence of sulfur and volatile matter. Results demonstrated that the NAlM-53 catalyst exhibited very high CH4 (>98%), and CO2 (~37%) conversion with 65% hydrogen selectivity at 800°C. A consistent activity for a prolonged duration of 100 hours was observed without carbon deposition owing to the promising properties of the catalyst derived from MOF precursors and the presence of oxidizing agents. These outcomes revealed the potential of MOF-derived catalysts in biogas tri-reforming for the production of hydrogen with extended stability.