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Synthesis of Nickel-Doped Ceria Catalysts for Selective Acetylene Hydrogenation

Journal Article · · ChemCatChem
 [1];  [1];  [2];  [3];  [1];  [1];  [4];  [4];  [5];  [5];  [3];  [6];  [1]
  1. Univ. of New Mexico, Albuquerque, NM (United States). Dept. of Chemical and Biological Engineering, and Center for Microengineered Materials
  2. Univ. of New Mexico, Albuquerque, NM (United States). Dept. of Chemistry and Chemical Biology; Jingdezhen Ceramic Inst. (China). Dept. of Material Science and Engineering
  3. Fuzhou Univ. (China). State Key Lab. of Photocatalysis on Energy and Environment
  4. Univ. of KwaZulu-Natal, Durban (South Africa). School of Chemistry and Physics, Catalysis Research Group
  5. Univ. of New Mexico, Albuquerque, NM (United States). Center for Stable Isotopes
  6. Univ. of New Mexico, Albuquerque, NM (United States). Dept. of Chemistry and Chemical Biology
+ Show Author Affiliations
Metallic nickel is known to be an active, but not a selective hydrogenation catalyst for conversion of alkynes to alkenes. On the other hand, nickel oxide is not active. Recently, we have demonstrated that nickel doped into ceria provides an inexpensive catalyst for selective hydrogenation of acetylene in the presence of ethylene. Here, we evaluate various synthesis methods to achieve optimal selective hydrogenation performance. We examined incipient wetness impregnation, coprecipitation, solution combustion, and sol-gel synthesis to study how the method of preparation affects catalytic structure and behavior. Sol-gel synthesis, coprecipitation, and solution combustion synthesis methods favor nickel incorporation into the ceria lattice, while incipient wetness impregnation creates segregated nickel species on the ceria surface. For hydrogenation of acetylene, these nickel surface species lead to poor ethylene selectivity due to ethane and oligomer formation. However, when nickel is incorporated into the ceria lattice, ethane formation is prevented even while achieving 100 % conversion of acetylene. Coke formation is also significantly reduced on these catalysts compared to conventional nanoparticle counterparts. Finally, we conclude that sol-gel synthesis provides the optimal method for creating a uniform dopant distribution within the high surface area ceria.
Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE
Grant/Contract Number:
FG02-05ER15712
OSTI ID:
1530590
Alternate ID(s):
OSTI ID: 1494787
Journal Information:
ChemCatChem, Journal Name: ChemCatChem Journal Issue: 5 Vol. 11; ISSN 1867-3880
Publisher:
ChemPubSoc EuropeCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (1)

Ni–Cu/Al 2 O 3 catalysts for the selective hydrogenation of acetylene: a study on catalytic performance and reaction mechanism journal January 2019

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
acetylene hydrogenation
catalyst synthesis
ceria
nickel
selective hydrogenation