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Effects of penta‐coordinated Al 3+ sites and Ni defective sites on Ni/ Al2O3 for CO methanation

Journal Article · · AIChE Journal
DOI:https://doi.org/10.1002/aic.17998· OSTI ID:2423406
 [1];  [1];  [1];  [2];  [3];  [1];  [4];  [4]
  1. College of Chemical Engineering and Technology Taiyuan University of Technology Taiyuan Shanxi China
  2. Department of Chemistry Queen's University Kingston Ontario Canada
  3. State Key Laboratory of Clean and Efficient Coal Utilization Institute of Coal Chemistry, Chinese Academy of Sciences Taiyuan Shanxi China
  4. College of Chemical Engineering and Technology Taiyuan University of Technology Taiyuan Shanxi China; State Key Laboratory of Clean and Efficient Coal Utilization Taiyuan University of Technology Taiyuan Shanxi China
Abstract

Engineering sophisticated structure of Al2O3and controlling the structure of counterpart metal active sites remain challenges to achieve a high catalytic‐performance in heterogeneous catalysis. Herein, we present a confinement strategy to stabilize homogeneous Ni by penta‐coordinated Al3+anchoring sites in Al2O3. This approach is involved in using a metal–organic framework as host to load Ni2+ions, by the aim of producing a confined Ni/Al2O3catalyst after a standard calcination. Metal–support interaction between Ni and Al2O3was tailored to be medium to avoid the formation of inactive NiAl2O4, which favors the generation of more available Ni active sites accessible to the reactants. The resultant Ni/Al2O3exhibited superior catalytic performance in comparison with the control Ni/Al2O3in CO methanation owing to the presence of defective sites on sufficient Ni0surface. Furthermore, the presence of oxygen vacancies on Al2O3and hydrogen spillover contributed toward excellent coke resistance properties in the reaction.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC02-06CH11357
OSTI ID:
2423406
Journal Information:
AIChE Journal, Journal Name: AIChE Journal Journal Issue: 5 Vol. 69; ISSN 0001-1541
Publisher:
American Institute of Chemical Engineers
Country of Publication:
United States
Language:
English

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