Dynamic Electrification of Dry Reforming of Methane with In Situ Catalyst Regeneration

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ACS Energy Letters
We report the design and performance of a rapid pulse Joule heating (RPH) reactor with an in situ Raman spectrometer for highly endothermic, reversible reactions. We demonstrate it for methane dry reforming over a bimetallic PtNi/SiO2 catalyst that shows better performance than its monometallic counterparts. The catalyst temperature ramp rate can reach ∼14000 °C/s, mainly owing to the low thermal mass and resistivity of the heating element. Joule heating elements afford temperatures unachievable by conventional technology to enhance performance and more than double the energy efficiency. Dynamic electrification can increase syngas productivity and rate. Extensive characterizations suggest that pulse heating creates an in situ catalyst regeneration strategy that suppresses coke formation, sintering, and phase segregation, resulting in improved catalyst stability, under many conditions. Potentially driven by renewable electricity, the RPH can provide superb process advantages for high-temperature endothermic reactions and lead to negative carbon emissions.
This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Energy Letters, copyright © 2023 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsenergylett.2c02666. This article will be embargoed until 02/10/2024. The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acsenergylett.2c02666.
climate action
Yu, Kewei, Cong Wang, Weiqing Zheng, and Dionisios G. Vlachos. “Dynamic Electrification of Dry Reforming of Methane with In Situ Catalyst Regeneration.” ACS Energy Letters 8, no. 2 (February 10, 2023): 1050–57. https://doi.org/10.1021/acsenergylett.2c02666.