2024 AIChE Annual Meeting

(596i) Non-Thermal Plasma Catalytic CO2 Hydrogenation over a Hydroxyapatite Supported Ni Catalyst: Effect of Severe Process Conditions on CO Production

Author

Achouri, E. I. - Presenter, Université de Sherbrooke
In the current work, the catalytic performance of a hydroxyapatite-supported nickel-zirconia catalyst, in a microwave plasma reactor for the CO2 hydrogenation to carbon monoxide was studied. The 10 wt% Ni-10wt% ZrO2/HAp was prepared by wetness impregnation method, dried at 180 °C for 18 hours and calcined at 500°C for 3 hours. The main factors influencing the catalytic performance are the H2/CO2 molar ratio and Power (W). The highest carbon yield ((CO2 conversion * CO selectivity)/100) were 83% under H2/CO2 to 2:1, Power=2.25 kW, and GHSV=80,00 mL.gr-1.hr-1 while maintaining 9% energy efficiency which to the best of our knowledge has never been reported in the literature. In this research, we embarked on a novel catalyst formulation for the CO2 hydrogenation reaction, tested a microwave discharge for the reaction which has received less attention in the literature, and operated at very high GHSV levels which is suitable for industrial production.

Highlights:

  • The synergy between plasma and catalyst increases the CO selectivity.
  • A novel bio-based catalyst under a microwave plasma discharge provides 83% CO2conversion and 99.96% CO selectivity.
  • The optimized H2/CO2ratio is 2.35.

· GHSV at very high ends does not affect the CO2 conversion and CO selectivity.