Nickel and molybdenum containing mesoporous catalysts for ethylene oligomerization and metathesis

• Published in: New journal of chemistry Vol. 4; no. 5; pp. 4146 - 4152
• Main Authors: Andrei, Radu Dorin, Popa, Marcel Ionel, Cammarano, Claudia, Hulea, Vasile
• Format: Journal Article
• Language: English
• Published: Royal Society of Chemistry [1987-....] 01.01.2016
• Subjects: Catalysis; Chemical Sciences; nickel; heterogeneous catalysis; metathesis; oligomerization; ethylene; molybdenum
• ISSN: 1144-0546; 1369-9261
• DOI: 10.1039/c5nj02586a

An original Ni-AlSiO 2 mesoporous catalyst (Si/Al = 6.5, 2.0 wt% Ni) was prepared using a commercial mesoporous non-ordered silica as a support. It exhibited notable catalytic behaviour for the oligomerization of ethylene in both batch and flow mode. Thus, at 150 °C and 3.5 MPa, the catalyst was highly active (up to 130 g of oligomers per gram of the catalyst per hour), selective (C4, C6, C8, and C10 olefins, no cracking products) and stable (high conversion for 9 h on-stream). However, the catalytic performances were slightly lower compared to those obtained with the catalyst prepared using a mesostructured SBA-15 silica as a model support. When nickel-catalyzed oligomerization was coupled with a metathesis reaction catalyzed by MoO x /(Al)SiO 2 or MoO x /(Al)SBA-15, ethylene was efficiently converted into propylene. To determine the physico-chemical properties of catalysts, various techniques were used, such as powder X-ray diffraction, N 2 sorption, 27 Al MAS NMR, Raman spectroscopy and X-ray photoelectron spectroscopy. Ethylene is converted into propylene by one-pot cascade reactions over catalysts prepared using a commercial mesoporous non-ordered silica as a support.