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Research Progress of Carbon Deposition on Ni-Based Catalyst for CO<sub>2</sub>-CH<sub>4</sub> Reforming
oleh: Yuan Ren, Ya-Ya Ma, Wen-Long Mo, Jing Guo, Qing Liu, Xing Fan, Shu-Pei Zhang
Format: | Article |
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Diterbitkan: | MDPI AG 2023-03-01 |
Deskripsi
As we all know, the massive emission of carbon dioxide has become a huge ecological and environmental problem. The extensive exploration, exploitation, transportation, storage, and use of natural gas resources will result in the emittance of a large amount of the greenhouse gas CH<sub>4</sub>. Therefore, the treatment and utilization of the main greenhouse gases, CO<sub>2</sub> and CH<sub>4</sub>, are extremely urgent. The CH<sub>4</sub> + CO<sub>2</sub> reaction is usually called the dry methane reforming reaction (CRM/DRM), which can realize the direct conversion and utilization of CH<sub>4</sub> and CO<sub>2</sub>, and it is of great significance for carbon emission reduction and the resource utilization of CO<sub>2</sub>-rich natural gas. In order to improve the activity, selectivity, and stability of the CO<sub>2</sub>-CH<sub>4</sub> reforming catalyst, the highly active and relatively cheap metal Ni is usually used as the active component of the catalyst. In the CO<sub>2</sub>-CH<sub>4</sub> reforming process, the widely studied Ni-based catalysts are prone to inactivation due to carbon deposition, which limits their large-scale industrial application. Due to the limitation of thermodynamic equilibrium, the CRM reaction needs to obtain high conversion and selectivity at a high temperature. Therefore, how to improve the anti-carbon deposition ability of the Ni-based catalyst, how to improve its stability, and how to eliminate carbon deposition are the main difficulties faced at present.