CO₂ methanation over Ni/SiO₂–Al₂O₃ catalysts: effect of Ba, La, and Ce addition

RSC Advances, Journal Year: 2025, Volume and Issue: 15(14), P. 10958 - 10969

Published: Jan. 1, 2025

The catalytic activity increased with a small addition of Ba, La and Ce on SiO 2 –Al O 3 supported Ni catalysts for CO methanation.

Language: Английский

Support Effects on the Activity and Selectivity of Ni₃CuSn_0.3 Trimetallic Catalysts in the Selective Hydrogenation of Phenylacetylene

ACS Omega, Journal Year: 2025, Volume and Issue: 10(16), P. 16993 - 17004

Published: April 15, 2025

Supported Ni-based catalysts present a promising alternative to precious Pd-based for the selective hydrogenation of phenylacetylene due their abundance and cost-effectiveness. However, influence support materials on catalytic performance has been insufficiently explored. In this study, series Ni3CuSn0.3 trimetallic (Ni:Cu:Sn molar ratio 3:1:0.3; Ni loading 20 wt %) supported various materials, including SiO2, SBA-15, Al2O3, MgO, CeO2, TiO2, were synthesized, characterized, evaluated. general, silica-supported showed higher activity but lower styrene selectivity, while metal oxide-supported exhibited reduced enhanced selectivity. The decreased with increasing Sn incorporation into Ni-Cu alloys, whereas selectivity was affected by both electronic geometric effects. Among tested, Ni3CuSn0.3/Al2O3 demonstrated highest at complete conversion. This catalyst further prepared via scalable solvent-free ball milling method, achieving an initial reaction rate 4.5 mmol/(g·min) 95% conversion under 60 °C 0.5 MPa. Moreover, it displayed stable over multiple cycles, properties remaining well-preserved. These results offer new opportunities developing large-scale processes using earth-abundant catalysts.

Language: Английский

Enhanced CH₄ Production from CO₂ Hydrogenation on γ-AlOOH-Supported Cobalt Catalyst with Abundant Surface Coordination Unsaturated Oxygen Atoms

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 5, 2024

Language: Английский