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Abstract:
The preparation of Co-based catalysts with a single, highly dispersed active site is challenging and crucial for the high-performance propane dehydrogenation (PDH) owing to harsh reaction conditions. Herein, the synergetic strategies including catalyst hydrothermal treatment and CO2 introduction are adopted to realize the highly dispersed and stable Td-Co(II) site and applied for PDH. According to systematic characterizations and catalytic performance evaluation, the facial hydrothermal treatment improves the C3H6 formation rate from 456 to 771 mmol C3H6 gCo−1 h−1 and catalyst stability via the transformation of Co3O4 species to the Td-Co(II) species. Meanwhile, the further introduction of CO2 into the PDH system as a protective reagent for Co state would facilitate PDH with superior catalytic performance with TOF of 700 h−1 and C3H6 formation rate of 970 mmol C3H6 gCo−1 h−1. It is revealed that the introduction of CO2 maintains Co state with the Td-Co(II) species via inhabiting the generation of metallic Co spices. © 2024 American Institute of Chemical Engineers.
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AIChE Journal
ISSN: 0001-1541
Year: 2024
Issue: 5
Volume: 70
3 . 5 0 0
JCR@2023
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ESI Highly Cited Papers on the List: 0 Unfold All
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