Work

Synthesis Strategies for the Optimization of Ni–Ce–Al Catalysts in the Conversion of CO 2 to Methanol

Year: 2025

Type: article

Abstract: High Resolution Image Download MS PowerPoint Slide The increase in carbon dioxide (CO 2 ) emissions has driven the search for sustainable alternatives, such as catalytic hydrogenation for methanol production. This work investigates how different synthesis methods affect the physicochemical properties and catalytic performance of Ni-Ce-Al-based materials applied to CO 2 hydrogenation. Three catalysts, with fixed contents of Ni (20% w/w) and CeO 2 (12% w/w), were prepared by direct impregnation (Ni-ID), sequential impregnation (Ni-IS), and sol-gel (Ni-SG). Techniques such as XRD, SEM-EDS, N 2 physisorption, FTIR, H 2 -TPR, CO chemisorption, CO 2 -TPD, and TPSR were employed to correlate the structure, metal dispersion, redox properties, and basic sites with catalytic activity. The Ni-SG catalyst exhibited a higher specific surface area, stronger metal-support interaction, and greater methanol productivity, outperforming the materials obtained by impregnation. The results demonstrate that the sol-gel route promotes the homogeneous incorporation of phases and the formation of more accessible active sites, contributing to a more selective and efficient CO 2 conversion. The study highlights the role of synthesis methods as a key strategy in the development of sustainable and high-efficiency catalysts.

Source: Industrial & Engineering Chemistry Research

DOI: 10.1021/acs.iecr.5c02712

Authors: Dayanne dos Santos Santos, Caroline Pereira Roldão, Marcos Alexandre Gelesky, Henrique Pacheco, Vanessa Bongalhardo Mortola

Institutions: Universidade Federal do Rio Grande, Universidade Federal do Rio de Janeiro

Language: English

Topic: Catalysts for Methane Reforming

Subfield: Catalysis

Field: Chemical Engineering

Domain: Physical Sciences

SDGs: Climate action, Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $4,500