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

11 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

Bibliographical note

Funding Information:
This work was supported by the National Natural Science Foundation of China (21722103, 21931005, 21720102002, and 21673140), Shanghai Science and Technology Committee (19JC1412600) and the SJTU-MPI partner group.

Publisher Copyright:
© 2020 American Chemical Society.

Keywords

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

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry

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