期刊
APPLIED CATALYSIS A-GENERAL
卷 591, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcata.2019.117376
关键词
Ethylene oligomerization; Nickel phosphide; Bronsted acid sites; Supports
资金
- National Research Foundation of Korea (NRF) - Ministry of Education, Republic of Korea [2016R1A6A1A03013422]
- Next Generation Carbon Upcylcing Program through the National Research Foundation of Korea - Ministry of Science and ICT, Republic of Korea [2017M1A2A2043148]
- National Research Foundation of Korea [2017M1A2A2043148] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Although homogeneous catalytic systems have been central in ethylene oligomerization, the SiO2-Al2O3-supported nickel phosphide (Ni2P) catalyst was recently examined to be capable of transforming ethylene into higher olefins. Herein, better catalytic performance in ethylene oligomerization is achieved with Ni2P/SiO2 than Ni2P/SiO2-Al2O3 and Ni2P/Al2O3. As a factor influencing ethylene oligomerization, the particle size of Ni2P is the smallest over Ni2P/SiO2 due to strong metal-support interaction. While the oligomer productivity is affected by the density of Bronsted acid site present in the supported Ni2P catalysts, Ni2P/SiO2 has a relatively high ratio of Bronsted to Lewis acid sites. Moreover, Ni2P/SiO2 is able to easily generate and transfer hydrogen species via the Bronsted acid P OH groups, which would affect formation of nickel hydride species that is important in oligomerizing ethylene. Therefore, the above features of Ni2P/SiO2 are beneficial for ethylene oligomerization into higher olefins.
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