Issue 10, 2024

Lanthanide promoted nickel catalysts for the integrated capture and conversion of carbon dioxide to methane via metal carbonates

Abstract

An integrated CO2 capture and conversion system utilizing metal hydroxide salts has been developed to capture CO2 from various sources including air in the form of carbonate salts and convert them directly into a synthetic fuel; methane. Nickel catalysts have previously been shown to convert carbonate salts, such as K2CO3 and Na2CO3, to methane. However, the productivity of these systems was rather modest in comparison to other catalysts based on ruthenium metal. With the help of lanthanide promoters, the methane productivity of nickel catalysts has been greatly improved. For the most part, the catalytic performance of the lanthanide promoted nickel catalysts followed the lanthanide contraction trend, i.e. the smaller the atomic size of the lanthanide, the higher the methane yield. Furthermore, the lanthanide promoted nickel catalysts are also stable under the alkaline conditions employed, maintaining their activity over five cycles of integrated CO2 capture and conversion. Lastly, the lanthanide promoted nickel catalysts were demonstrated to be more economical compared to ruthenium- and unpromoted nicked-based catalysts.

Graphical abstract: Lanthanide promoted nickel catalysts for the integrated capture and conversion of carbon dioxide to methane via metal carbonates

Supplementary files

Article information

Article type
Paper
Submitted
13 Jun 2024
Accepted
08 Sep 2024
First published
13 Sep 2024
This article is Open Access
Creative Commons BY license

RSC Sustain., 2024,2, 2885-2895

Lanthanide promoted nickel catalysts for the integrated capture and conversion of carbon dioxide to methane via metal carbonates

C. J. Koch, Z. Suhail, Prince, A. Alagaratnam, M. Coe, A. Goeppert and G. K. S. Prakash, RSC Sustain., 2024, 2, 2885 DOI: 10.1039/D4SU00306C

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