Abstract

CO2 methanation has gained traction for its potential in renewable energy storage, though the high cost of renewable hydrogen production remains a significant barrier to implementation. Herein we present the Ru‐Fe@NCNT catalyst, consisting of ruthenium and iron nanoparticles on nitrogen‐doped carbon nanotubes, as a highly selective, hydrogen efficient, iron‐driven alternative to typical nickel and ruthenium catalysts used for CO and CO2 methanation. Ru‐Fe@NCNTs offer competitive CO2 conversion, improved methane selectivity, 26% higher hydrogen utilisation and an up to 80% reduction in ruthenium loading versus similar literature and commercial catalysts. It is proposed that this desirable CO2 methanation performance is a result of effective cooperation between the iron‐catalysed reverse water gas shift and methane‐selective Fischer‐Tropsch, and ruthenium‐catalysed CO methanation reactions.
Original languageEnglish
Pages (from-to)294-306
Number of pages13
JournalEnergy Technology
Volume7
Issue number2
Early online date6 Nov 2018
DOIs
Publication statusPublished - 1 Feb 2019

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