Work

On the effect of Li or Na doping on Ru/TiO2 catalyst for CO2 methanation

Year: 2025

Type: article

Abstract: Metal-support interactions can widely affect or even dominate the catalytic activity, selectivity, and stability of supported Ru nanoparticles during the CO 2 methanation. In this work, we report on the effects of doping a Ru/TiO 2 catalyst with either Li or Na (3 % wt.) with the general aim to provide a large pool of surface basic sites of weak/medium strength capable to promote CO 2 adsorption and methanation at low temperature. However, catalytic kinetic measurements show that both alkali metals hinder the activity of the parent catalyst by different mechanisms. Detailed catalysts characterization (by XRD, porosimetric analysis, CO-DRIFTS, CO 2 -TPD and H 2 -TPSR) and operando DRIFTS experiments are used to evaluate the specific impact on the type of CO 2 -derived adsorbed and intermediate species and on possible reaction pathways by also comparing the results with analogue Ru-catalysts supported on γ-Al 2 O 3

Source: Catalysis Today

DOI: 10.1016/j.cattod.2025.115245

Authors: Stefano Cimino, Elisabetta Maria Cepollaro, Luciana Lisi

Institution: National Research Council

Language: English

Topic: Catalysts for Methane Reforming

Subfield: Catalysis

Field: Chemical Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $3,930