Direct methane functionalization and, in particular, the selective partial oxidation to methanol, remains an eminent challenge and a field of competitive research. The conversion of methane to methanol over transition-metal-containing zeolites using molecular oxygen is a promising and extensively studied process. Herein, we scrutinize some oft-cited assumptions in this topic—which include the labelling of the process as biomimetic, the debate regarding the industrial viability of direct methane-oxidation systems and the claim that methane is difficult to activate—and delineate the extent to which these are scientifically robust. We highlight both the merits and pitfalls of such statements and point out the hazards associated with their improper use. By examining these misconceptions, we build an outlook for future research, highlighting the need to optimize materials and process conditions for the stepwise approach and to further explore catalytic processes that explicitly employ strategies for the preservation of methanol.
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Copper-zeolites Prepared by Solid-state Ion Exchange - Characterization and Evaluation for the Direct Conversion of Methane to Methanol
Topics in Catalysis Open Access 27 December 2022
Nature Communications Open Access 16 March 2022
Nature Communications Open Access 11 May 2021
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The authors acknowledge the ESI platform, Paul Scherrer Institute and ETH Zurich for financial support. DP is grateful for the Swiss National Supercomputing Centre for providing the computational facilities.
The authors have no competing interests.
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Ravi, M., Sushkevich, V.L., Knorpp, A.J. et al. Misconceptions and challenges in methane-to-methanol over transition-metal-exchanged zeolites. Nat Catal 2, 485–494 (2019). https://doi.org/10.1038/s41929-019-0273-z
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