Journal
JOURNAL OF CATALYSIS
Volume 414, Issue -, Pages 374-384Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2022.09.005
Keywords
Semi -hydrogenation of acetylene; Layered double hydroxide; Spinel-type M II -M III complex oxide; Support effect; Coke resistance
Categories
Funding
- National Natural Science Foundation of China [21935001, 22005022, 22175012]
- Program for Changjiang Scholars and Innovation Research Team in the University [IRT1205]
- Beijing University of Chemical Technology [BUCTRC202025]
- Natural Science Foundation of Beijing, China [2214062]
- Fundamental Research Funds for the Central Universities
- Ministry of Finance
- Ministry of Education of PRC
- S&T Program of Hebei [21344601D]
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In this study, an improved Ni/MgAl2O4 catalyst was synthesized, which exhibited high conversion and selectivity in the semi-hydrogenation of ethylene, as well as excellent resistance to carbon deposition and long-term stability.
Even though Ni catalysts have shown promising performance in the semi-hydrogenation of ethylene, the selectivity and stability remain to be improved so that they may be used to replace expensive noble metal catalysts. Herein, an aluminate-intercalated NiMgAl-layered double hydroxide (LDH) was prepared through a facile co-precipitation approach, and then a topotactic transformation strategy was employed to convert the tailored LDH precursor to the spinel catalyst. More than 99% of the Ni/MgAl2O4 catalyst's conversion was achieved toward the semi-hydrogenation of acetylene at 140 degrees C, with a selectivity of more than 80%. Additionally, due to high specific surface area (309 m2/g) with tuned acidity, this catalyst showed outstanding resistance to the deposition of carbonaceous compounds and satisfactory long-term stability during a 28 hr test. It is hoped that this study will inspire the design of supported non-noble metal materials with high activity and efficiency towards organic or organo-thermal reactions, as well as provide a basic understanding of the role and impacts of intercalated aluminates in LDH.(c) 2022 Elsevier Inc. All rights reserved.
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