Essential Role of the Support for Nickel-Based CO₂ Methanation Catalysts

Abstract

The carbon dioxide (CO2) methanation reaction not only provides a solution for mitigating the excessive carbon dioxide emissions but also can potentially be employed for the storage and transportation of low-grade energies. A supported nickel-based catalyst is the most promising candidate for the CO2 methanation reaction. Additionally, understanding the role of the support is essential for the rational design of nickel-based CO2 methanation catalysts. Herein, we elaborated on the effect of the support on the catalyst structure, CO2 adsorption, CO2 activation, methanation mechanism, and deactivation process. Future directions are suggested to elucidate the fundamental aspects of this catalytic system, including the formation mechanism of preferentially exposed facets, the nature of strong metal–support interactions, the balance between support reducibility and basicity, and the CO2 methanation pathways over nickel-based catalysts with various supports.

Boosting the performance of Ni/Al2O3 for the reverse water gas shift reaction through formation of CuNi nanoalloys

“…Even though CO 2 hydrogenation over nickel-supported catalysts have been extensively studied, there is not yet a broad consensus regarding the reaction mechanism. The major difference is related to the pathway of CO 2 activation, where the metal-support interface plays a key role 7,[114][115][116][117][118] . For Ni/Al 2 O 3 catalysts, it is assumed that CO and CH 4 are formed through formate species adsorbed on the support.…”

Past, Present and Near Future: An Overview of Closed, Running and Planned Biomethanation Facilities in Europe

“…Furthermore, in the case of biological methanation, microorganisms catalyze the reaction in a multiphase system because the gaseous H 2 and CO 2 are dissolved in the liquid phase, in which the Archaea absorb them and produce CH 4 [33]. In contrast, chemical methanation needs other types of catalysts, e.g., ruthenium [34] or nickel-based catalysts, that are characterized by high performance and low cost [35]. The catalysts determine different opportunities and limitations as well.…”

Electronic Structure Modulation of Non‐Noble‐Metal‐Based Catalysts for Biomass Electrooxidation Reactions

“…[1] Carbon emission, due to the release of greenhouse gases such as CO 2 and CH 4 , among others, is a complex issue in the fields of energy and environment that needs to be addressed. [2][3][4] These greenhouse gases are derived from the combustion of fossil fuels and cause global warming and rise in sea levels, which threaten human survival. In this regard, the concept of carbon neutrality is proposed to achieve a balance between carbon absorption and emission through the rational use of carbon-containing substances.…”