1. Preparation of Mn-Doped Co 3 O 4 Catalysts by an Eco-Friendly Solid-State Method for Catalytic Combustion of Low-Concentration Methane.
- Author
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Xue, Linshuang, Yuan, Chenyi, Wu, Shipeng, Huang, Zhen, Yan, Zhen, Streiff, Stéphane, Xu, Hualong, and Shen, Wei
- Subjects
COALBED methane ,METHANE as fuel ,COMBUSTION ,ATMOSPHERIC methane ,METAL catalysts ,METHANE ,GREENHOUSE effect ,CATALYSTS - Abstract
Coalbed methane is a significant source of methane in the atmosphere, which is a potent greenhouse gas with a considerable contribution to global warming, thus it is of great importance to remove methane in coalbed gas before the emission. Exploring the economical non-noble metal catalysts for catalytic methane combustion (CMC) has been a wide concern to mitigate the greenhouse effect caused by the emitted low-concentration methane. Herein, a series of Mn-doped Co
3 O4 catalysts have been synthesized by the environmentally friendly solid-state method. As a result, the Mn0.05 Co1 catalyst performed the best CMC activity (T90 = 370 °C) and good moisture tolerance (3 vol% steam). The introduction of an appropriate amount of manganese conduced Co3 O4 lattice distortion and transformed Co3+ to Co2+ , thus producing more active oxygen vacancies. Mn0.05 Co1 exhibited better reducibility and oxygen mobility. In situ studies revealed that methane was adsorbed and oxidized much easier on Mn0.05 Co1 , which is the crucial reason for its superior catalytic performance. [ABSTRACT FROM AUTHOR]- Published
- 2023
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