期刊
CATALYSTS
卷 9, 期 11, 页码 -出版社
MDPI
DOI: 10.3390/catal9110933
关键词
ethylene; oligomerization; nickel oxide; silica-alumina; metal oxide-support interaction
资金
- Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Ministry of Trade, Industry and Energy [20153010092090, 20181110200060]
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science ICT [2019R1F1A1061214]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20153010092090, 20181110200060] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2019R1F1A1061214] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
We investigated the interactions between nickel oxide and silica-alumina supports, which were applied to the catalytic oligomerization of ethylene by powder X-ray diffraction, UV diffuse reflectance spectroscopy, H-2 temperature-programmed reduction, and X-ray photoelectron spectroscopy. The catalytic activity was also correlated with the acidity of catalysts determined by NH3 temperature-programmed desorption and pyridine FT-IR spectroscopy. Although all the catalysts had similar Ni contents, their catalytic performances were strongly influenced by the strength of the metal oxide-support interaction. Strong interaction promoted the formation of nickel aluminate on the catalyst surface, and resulted in low catalytic activity due to reducing the amount of nickel oxide active sites. However, weak interaction favored the aggregation of nickel oxide species into larger particles, and thus resulted in low ethylene conversion and selectivity to oligomers. Eventually, the optimal activity was realized at the medium interaction strength, preserving a high amount of both active nickel oxides and acid sites.
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