Efficient and Stable Ni/ZSM-5@MCM-41 Catalyst for CO2 Methanation,ACS Sustainable Chemistry & Engineering

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Efficient and Stable Ni/ZSM-5@MCM-41 Catalyst for CO2 Methanation
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2022-09-14 , DOI: 10.1021/acssuschemeng.2c03693
Chao Miao ₁ , Kaixuan Shang ₁ , Lixing Liang ₁ , Shumei Chen ₁ , Jing Ouyang _{1,

2,

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Affiliation

In this work, a Ni-based catalyst supported on a core–shell structure catalytic carrier material (Ni/ZSM-5@MCM-41) based on kaolinite tailings is reported, which exhibits excellent CO₂ methanation performance at atmospheric pressure. At 400 °C, CO₂ conversion and CH₄ selectivity reach 80 and 97% with the space velocity of 12,000 mL g_cat^–1 h^–1, respectively, and it can maintain good stability during the 80 h stability test. Compared with traditional Ni/ZSM-5 and Ni/MCM-41 catalysts, Ni/ZSM-5@MCM-41 has more substantial confinement effects on the active components, and the active components are more evenly dispersed on surface of the carrier. In addition, it is confirmed by the in situ diffuse reflectance infrared Fourier transform spectroscopy technique that CO₂ methanation over the Ni/ZSM-5@MCM-41 catalyst follows the path of formate and CO as intermediates.

中文翻译：

用于二氧化碳甲烷化的高效稳定 Ni/ZSM-5@MCM-41 催化剂

在这项工作中，报道了一种负载在基于高岭石尾矿的核壳结构催化载体材料（Ni/ZSM-5@MCM-41）上的镍基催化剂，该催化剂在常压下表现出优异的CO _{2甲烷化性能。}在400 ℃下，CO ₂转化率和CH ₄选择性分别达到80%和97%，空速为12,000 mL g _cat^–1 h ^–1，在80 h稳定性测试中仍能保持良好的稳定性。与传统的Ni/ZSM-5和Ni/MCM-41催化剂相比，Ni/ZSM-5@MCM-41对活性成分的限制作用更显着，活性成分更均匀地分散在载体表面。此外，经证实_{Ni/ZSM-5@MCM-41催化剂上的CO 2}甲烷化沿着甲酸盐和CO作为中间体的路径进行原位漫反射红外傅里叶变换光谱技术。

更新日期：2022-09-14

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