Effect of the Rare Earth Metals (Tb, Nd, Dy) addition for the modification of nickel catalysts supported on alumina in CO2 Methanation

Namvar, Farzad; Salavati‐Niasari, Masoud; Meshkani, Fereshteh

doi:10.1016/j.ijhydene.2022.10.096

Cited by 10 publications

(2 citation statements)

References 62 publications

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“…In the FTIR spectrum, many carbonate and formic acid species can be found. It appears to be more in line with Ashok et al’s hypothesis [ 15 , 18 ], rather than the pathway that produces CO intermediate species [ 49 – 51 ].…”

Section: Resultssupporting

confidence: 78%

Low-temperature methanation of fermentation gas with Ni-based catalysts in a multicomponent system

Yin,

Yao,

Zhao

et al. 2024

Biotechnol Biofuels

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A large amount of greenhouse gases, such as carbon dioxide and methane, are released during the production process of bioethanol and biogas. Converting CO2 into methane is a promising way of capturing CO2 and generating high-value gas. At present, CO2 methanation technology is still in the early stage. It requires high temperature (300–400 ℃) and pressure (> 1 MPa), leading to high cost and energy consumption. In this study, a new catalyst, Ni–Fe/Al–Ti, was developed. Compared with the activity of the common Ni/Al2O3 catalyst, that of the new catalyst was increased by 1/3, and its activation temperature was reduced by 100℃. The selectivity of methane was increased to 99%. In the experiment using simulated fermentation gas, the catalyst showed good catalytic activity and durability at a low temperature and atmospheric pressure. Based on the characterization of catalysts and the study of reaction mechanisms, this article innovatively proposed a Ni–Fe/Al–Ti quaternary catalytic system. Catalytic process was realized through the synergism of Al–Ti composite support and Ni–Fe promotion. The oxygen vacancies on the surface of the composite carrier and the higher activity metals and alloys promoted by Fe accelerate the capture and reduction of CO2. Compared with the existing catalysts, the new Ni–Fe/Al–Ti catalyst can significantly improve the methanation efficiency and has great practical application potential.

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Section: Resultssupporting

confidence: 78%

Low-temperature methanation of fermentation gas with Ni-based catalysts in a multicomponent system

Yin,

Yao,

Zhao

et al. 2024

Biotechnol Biofuels

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“…Therefore, it is necessary to further enhance the catalytic activity and CH 4 selectivity of Ni-based catalysts, such as through the application of supports and promoters, the use of appropriate preparation methods, etc. [ 66 ].…”

Section: Non-noble Metal Catalysts For Co 2 Methan...mentioning

confidence: 99%

Research Progress of Non-Noble Metal Catalysts for Carbon Dioxide Methanation

Cui,

He,

Yang

et al. 2024

Molecules

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The extensive utilization of fossil fuels has led to a rapid increase in atmospheric CO2 concentration, resulting in various environmental issues. To reduce reliance on fossil fuels and mitigate CO2 emissions, it is important to explore alternative methods of utilizing CO2 and H2 as raw materials to obtain high-value-added chemicals or fuels. One such method is CO2 methanation, which converts CO2 and H2 into methane (CH4), a valuable fuel and raw material for other chemicals. However, CO2 methanation faces challenges in terms of kinetics and thermodynamics. The reaction rate, CO2 conversion, and CH4 yield need to be improved to make the process more efficient. To overcome these challenges, the development of suitable catalysts is essential. Non-noble metal catalysts have gained significant attention due to their high catalytic activity and relatively low cost. In this paper, the thermodynamics and kinetics of the CO2 methanation reaction are discussed. The focus is primarily on reviewing Ni-based, Co-based, and other commonly used catalysts such as Fe-based. The effects of catalyst supports, preparation methods, and promoters on the catalytic performance of the methanation reaction are highlighted. Additionally, the paper summarizes the impact of reaction conditions such as temperature, pressure, space velocity, and H2/CO2 ratio on the catalyst performance. The mechanism of CO2 methanation is also summarized to provide a comprehensive understanding of the process. The objective of this paper is to deepen the understanding of non-noble metal catalysts in CO2 methanation reactions and provide insights for improving catalyst performance. By addressing the limitations of CO2 methanation and exploring the factors influencing catalyst effectiveness, researchers can develop more efficient and cost-effective catalysts for this reaction.

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