Research Progress of Carbon Deposition on Ni-Based Catalyst for CO2-CH4 Reforming

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 CH4. Therefore, the treatment and utilization of the main greenhouse gases, CO2 and CH4, are extremely urgent. The CH4 + CO2 reaction is usually called the dry methane reforming reaction (CRM/DRM), which can realize the direct conversion and utilization of CH4 and CO2, and it is of great significance for carbon emission reduction and the resource utilization of CO2-rich natural gas. In order to improve the activity, selectivity, and stability of the CO2-CH4 reforming catalyst, the highly active and relatively cheap metal Ni is usually used as the active component of the catalyst. In the CO2-CH4 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.

Automated summary

As we all know, the emission of carbon dioxide is a major ecological and environmental issue. Therefore, it is urgent to treat and utilize the main greenhouse gases, CO2 and CH4. The dry methane reforming reaction (CRM/DRM) is of great significance for carbon emission reduction and the resource utilization of CO2-rich natural gas. However, the Ni-based catalysts used for this reaction are susceptible to carbon deposition, which hinders their industrial application.