Atomically Dispersed Ni-Based Anti-Coking Catalysts for Methanol Dehydrogenation in a Fixed-Bed Reactor

Jing Tan Han, Zhong Hua Xue, Ke Zhang, Hong Hui Wang, Xin Hao Li*, Jie Sheng Chen

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    17 Scopus citations

    Abstract

    Transition metal-based catalysts usually suffer from poor coke resistance during the dehydrogenation processes of hydrocarbon compounds in gas-solid heterogeneous systems, including methanol dehydrogenation. Herein, atomically dispersed Ni sites have been rationally anchored in nitrogen-doped carbon sheets (Ni-N4/NC), which could act as an integrated, active, and anticoking catalyst for methanol dehydrogenation with a high selectivity toward hydrogen and CO under 15 h-1 (weight hourly space velocities, WHSV) in a fixed-bed reactor. Both experimental and computational results reveal that the electronic structures of Ni-N4 sites promote the desorption of deep dehydrogenation product ethylene to release the Ni active centers, simultaneously giving a remarkably high H2 yield rate (1800 mol H2 mol-1 Ni h-1) and a high anticoking performance even under critical conditions.

    Original languageEnglish (US)
    Pages (from-to)12569-12574
    Number of pages6
    JournalACS Catalysis
    Volume10
    Issue number21
    DOIs
    StatePublished - Nov 6 2020

    Keywords

    • anticoking
    • fixed-bed reactor
    • methanol dehydrogenation
    • Ni-Nsites
    • nitrogen-doped carbon

    ASJC Scopus subject areas

    • Catalysis
    • General Chemistry

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