Work

Dry reforming of methane over nickel aluminate-derived catalysts modified with lanthanum and magnesium

Year: 2025

Type: article

Abstract: ABSTRACT This study focuses on a novel catalytic system for the dry reforming of methane (DRM) under challenging conditions. Nickel catalysts modified with trace amounts of lanthanum or magnesium (with a nominal promoter/Ni molar ratio of 0.06) using nickel aluminate as precursor were highly efficient when operating at low temperatures (650 ºC) and high space velocities (90,000 h -1 ; 720 L min -1 g -1 , 2,200 L g Ni -1 h -1 ). The calcined precursors and the corresponding freshly reduced and used catalysts were characterized by XRF, N 2 physisorption, XRD, Raman spectroscopy, STEM/HAADF, STEM/EDS, XPS, H 2 -TPR, CO 2 -TPD, thermogravimetry and TEM. The La-promoted catalyst exhibited the best results owing to a proper combination of metallic surface area, increased basic sites for effective CO 2 adsorption and controlled formation of carbonaceous deposits. However, the performance of the Mg-promoted counterpart was negatively affected by the strong interaction between Ni and Mg, which decreased the availability of active metallic sites. This resulted in lower reactant conversions, though the catalyst remained reasonably stable over 24 hours. The presence of both promoters was effective in preventing sintering, a disadvantage of the bare nickel catalyst.

Source: Catalysis Today

DOI: 10.1016/j.cattod.2025.115483

Authors: María Córdoba, Andoni Choya, Beatriz de Rivas, Jose Ignacio Gutiérrez-Ortiz, Rubén López-Fonseca

Institution: University of the Basque Country

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