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Title: Differences in the Nature of Active Sites for Methane Dry Reforming and Methane Steam Reforming over Nickel Aluminate Catalysts

Journal Article · · ACS Catalysis
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [5]
  1. Georgia Inst. of Technology, Atlanta, GA (United States). School of Chemical & Biomolecular Engineering. Renewable Bioproducts Inst.; The Dow Chemical Company, Freeport, TX (United States)
  2. Georgia Inst. of Technology, Atlanta, GA (United States). School of Chemical & Biomolecular Engineering
  3. Micromeritics Instrument Corporation, Norcross, GA (United States)
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Chemical Technology Division
  5. Georgia Inst. of Technology, Atlanta, GA (United States). School of Chemical & Biomolecular Engineering. Renewable Bioproducts Inst.
  6. Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II
  7. Argonne National Lab. (ANL), Argonne, IL (United States). Chemical Technology Division; Purdue Univ., West Lafayette, IN (United States). School of Chemical Engineering

In this paper, the Pechini synthesis was used to prepare nickel aluminate catalysts with the compositions NiAl4O7, NiAl2O4, and Ni2Al2O5. The samples have been characterized by N2 physisorption, temperature-programmed reduction (TPR), temperature-programmed oxidation (TPO), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and X-ray absorption spectroscopy (XAS). Characterization results indicate unique structural properties and excellent regeneration potential of nickel aluminates. Prepared samples were tested when unreduced and reduced prior to reaction for methane dry reforming and methane steam reforming reactivity. NiAl2O4 in the reduced and unreduced state as well as NiAl4O7 in the reduced state are active and stable for methane dry reforming due to the presence of 4-fold coordinated oxidized nickel. The limited amount of metallic nickel in these samples minimizes carbon deposition. Finally, on the other hand, the presence of metallic nickel is required for methane steam reforming. Ni2Al2O5 in the reduced and unreduced states and NiAl2O4 in the reduced state are found to be active for methane steam reforming due to the presence of sufficiently small nickel nanoparticles that catalyze the reaction without accumulating carbonaceous deposits.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Argonne National Laboratory (ANL), Argonne, IL (United States); Georgia Institute of Technology, Atlanta, GA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); The Dow Chemical Company (United States); Georgia Institute of Technology (United States)
Contributing Organization:
Micromeritics Instrument Corporation, Norcross, GA (United States); The Dow Chemical Company, Freeport, TX (United States); Purdue Univ., West Lafayette, IN (United States)
Grant/Contract Number:
AC02-06CH11357; AC02-98CH10886
OSTI ID:
1341645
Report Number(s):
BNL-113364-2016-JA; TRN: US1701775
Journal Information:
ACS Catalysis, Vol. 6, Issue 9; ISSN 2155-5435
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 128 works
Citation information provided by
Web of Science

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Controlling the Reduction Extent for Metal Catalysts journal May 2019
Methane Activation and Utilization: Current Status and Future Challenges journal December 2019
Oxidative Dehydrogenation of n -Octane over Niobium-Doped NiAl 2 O 4 : An Example of Beneficial Coking in Catalysis over Spinel journal March 2018
Nickel Poisoning of a Cracking Catalyst Unravelled by Single‐Particle X‐ray Fluorescence‐Diffraction‐Absorption Tomography journal January 2020
Geometric design of a Ni@silica nano-capsule catalyst with superb methane dry reforming stability: enhanced confinement effect over the nickel site anchoring inside a capsule shell with an appropriate inner cavity journal January 2018
Development of Active and Stable Low Nickel Content Catalysts for Dry Reforming of Methane journal May 2017