The synthesis of biomethanol from renewable feedstocks represents a sustainable alternative to fossil fuels. However, traditional copper catalysts (Cu/ZnO/Al$_{2}$O$_{3}$) are subject to thermal sintering of the copper, a process accelerated by the reaction-produced water. Through a detailed review of the literature and a comparative analysis, catalysts based on indium oxide (In$_{2}$O$_{3}$) have demonstrated long term maintenance of high selectivity and successful inhibition of the RWGS reaction. This research provides guidelines for the selection of the catalytic system and for future research.
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