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Improving Low‐Temperature CO~2~ Methanation by Promoting Ni‐Al LDH‐Derived Catalysts with Alkali Metals by Yan Resing Dias; Fabiano Bernardi; Oscar W. Perez‐Lopez is a Chemistry article available to read on EtoBox.

What is Improving Low‐Temperature CO~2~ Methanation by Promoting Ni‐Al LDH‐Derived Catalysts with Alkali Metals about?

## Abstract Fossil fuel depletion and environmental impacts caused by greenhouse gas emissions such as CO~2~ are significant issues securing nature preservation within a sustainable economy. CO~2~ methanation is a promising process to mitigate CO~2~ emissions and reuse it to produce CH~4~, serving as fuel, chemical feedstock, and energy source. A series of LDH‐derived Ni‐Al catalysts promoted by Li, Mg, Ca, and La were prepared via co‐precipitation. Characterization by N~2~ physisorption, X‐ray diffraction (XRD) and photoelectron spectroscopy (XPS), as well as thermal techniques such as temperature programmed reduction (H~2~‐TPR), desorption (CO~2~‐TPD, H~2~‐TPD), and oxidation (TPO) analyses were performed. Low‐temperature catalytic tests (200–400 °C) revealed that alkali metal modification improves performance even at 200 °C, where the Ni55Ca11Al33 catalyst achieved 74 % CO~2~ conversion with 100 % CH~4~ selectivity by enhancing basicity and metal‐support interaction, high Ni dispersion and small crystallite sizes, providing proper sites to adsorb and activate CO~2~. Moreover, the catalysts presented excellent resistance to deactivation, maintaining high stability during 10 h on

Who reads Improving Low‐Temperature CO~2~ Methanation by Promoting Ni‐Al LDH‐Derived Catalysts with Alkali Metals?

Author

Yan Resing Dias; Fabiano Bernardi; Oscar W. Perez‐Lopez

Publisher

Wiley

Published

2023

Field

Chemistry (Physical Sciences)