Investigating the role of zeolite supports in Ni-based catalysts for CO2-methanation using in situ/operando XAS–GC-MS

IF 4.8 3区材料科学 Q1 CHEMISTRY, APPLIED

Microporous and Mesoporous Materials Pub Date : 2025-02-22 DOI:10.1016/j.micromeso.2025.113548

Waranya Obrom , Worapol Yingyuen , Tatchapol Nanmong , Krittanun Deekamwong , Pimrapus Tawachkultanadilok , Jatuporn Wittayakun , Sanchai Prayoonpokarach , Yingyot Poo-arporn , Karin Föttinger , Jean-Paul Desaulniers , Sirinuch Loiha

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引用次数: 0

Abstract

Nickel (Ni) is regarded as the most effective non-noble metal catalyst for CO₂ methanation. Its performance is strongly influenced by support material and Ni reducibility. This study investigates the impact of zeolite types (ANA, LTA, and ZSM-5) on the reducibility and catalytic performance of 5 wt% Ni catalysts, compared with SiO₂. Reducibility, measured via in situ X-ray absorption spectroscopy (XAS) from 100 to 450 °C, followed the order: 5Ni/ZSM-5 > 5Ni/ANA > 5Ni/LTA > 5Ni/SiO₂. Catalytic testing in a fixed-bed flow reactor revealed the highest CO₂ conversion at 400 °C, following the order: 5Ni/LTA > 5Ni/ZSM-5 > 5Ni/ANA > 5Ni/SiO₂. Zeolite-supported catalysts achieved significantly higher CH₄ selectivity compared to 5Ni/SiO₂, with the trend: 5Ni/LTA > 5Ni/ZSM-5 > 5Ni/ANA ≫ 5Ni/SiO₂. Comprehensive characterization using X-ray diffraction, N₂ adsorption-desorption, and X-ray photoelectron spectroscopy was conducted to analyze catalyst properties. The CO₂ methanation mechanism was deduced using data from in situ XAS-MS. These findings demonstrate that zeolite-supported Ni catalysts, particularly 5Ni/LTA, exhibit superior reducibility and catalytic performance, advancing the development of efficient materials for CO₂ conversion.

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来源期刊

Microporous and Mesoporous Materials 化学-材料科学：综合

CiteScore

10.70

自引率

5.80%

发文量

649

审稿时长

26 days

期刊介绍： Microporous and Mesoporous Materials covers novel and significant aspects of porous solids classified as either microporous (pore size up to 2 nm) or mesoporous (pore size 2 to 50 nm). The porosity should have a specific impact on the material properties or application. Typical examples are zeolites and zeolite-like materials, pillared materials, clathrasils and clathrates, carbon molecular sieves, ordered mesoporous materials, organic/inorganic porous hybrid materials, or porous metal oxides. Both natural and synthetic porous materials are within the scope of the journal. Topics which are particularly of interest include: All aspects of natural microporous and mesoporous solids The synthesis of crystalline or amorphous porous materials The physico-chemical characterization of microporous and mesoporous solids, especially spectroscopic and microscopic The modification of microporous and mesoporous solids, for example by ion exchange or solid-state reactions All topics related to diffusion of mobile species in the pores of microporous and mesoporous materials Adsorption (and other separation techniques) using microporous or mesoporous adsorbents Catalysis by microporous and mesoporous materials Host/guest interactions Theoretical chemistry and modelling of host/guest interactions All topics related to the application of microporous and mesoporous materials in industrial catalysis, separation technology, environmental protection, electrochemistry, membranes, sensors, optical devices, etc.