CO2 Hydrogenation to Methane over Ni-Catalysts: The Effect of Support and Vanadia Promoting

• Published in: Catalysts 2021-04, Vol.11 (4), p.433
• Main Authors: Pieta, Izabela S., Lewalska-Graczyk, Agnieszka, Kowalik, Pawel, Antoniak-Jurak, Katarzyna, Krysa, Mikolaj, Sroka-Bartnicka, Anna, Gajek, Arkadiusz, Lisowski, Wojciech, Mrdenovic, Dusan, Pieta, Piotr, Nowakowski, Robert, Lew, Agata, Serwicka, Ewa M.
• Format: Article
• Language: English
• Subjects: Alternative energy sources; Aluminum oxide; Atmospheric pressure; Biogas; Carbon cycle; Carbon dioxide; Catalysts; Chemical reactions; Conversion; Fuel production; Hydrogenation; Metal oxides; Methane; Nanocrystals; Production methods; Selectivity; X ray photoelectron spectroscopy
• ISSN: 2073-4344; 2073-4344
• DOI: 10.3390/catal11040433

Within the Waste2Fuel project, innovative, high-performance, and cost-effective fuel production methods are developed to target the “closed carbon cycle”. The catalysts supported on different metal oxides were characterized by XRD, XPS, Raman, UV-Vis, temperature-programmed techniques; then, they were tested in CO2 hydrogenation at 1 bar. Moreover, the V2O5 promotion was studied for Ni/Al2O3 catalyst. The precisely designed hydrotalcite-derived catalyst and vanadia-promoted Ni-catalysts deliver exceptional conversions for the studied processes, presenting high durability and selectivity, outperforming the best-known catalysts. The equilibrium conversion was reached at temperatures around 623 K, with the primary product of reaction CH4 (>97% CH4 yield). Although the Ni loading in hydrotalcite-derived NiWP is lower by more than 40%, compared to reference NiR catalyst and available commercial samples, the activity increases for this sample, reaching almost equilibrium values (GHSV = 1.2 × 104 h–1, 1 atm, and 293 K).