Effects of matrix alumina-silica ratio on the performance of heavy oil cracking catalysts containing zeolite Y in matrices of amorphous silica-alumina

• Published in: Applied catalysis Vol. 70; no. 1; pp. 43 - 52
• Main Authors: Otterstedt, J.-E., Zhu, Yan-Ming, Sterte, J.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 1991; Elsevier
• Subjects: active matrices; alumina-silica; Applied sciences; cracking catalysts; Crude oil, natural gas and petroleum products; Energy; Exact sciences and technology; Fuels; gasoline; heavy oil; hydrothermal treatment; pore structure; Processing of crude oil and oils from shales and tar sands. Processes. Equipment. Refinery and treatment units; zeolites; cracking catalysts; zeolites; active matrices; hydrothermal treatment; gasoline; alumina-silica; pore structure; heavy oil; Octane number; Catalyst selectivity; Vacuum gas oil; Aluminosilicates; Zeolite; Petroleum; Molecular sieve; Pore; Gasoline; Chemical composition; Catalyst activity; Catalyst; Catalytic cracking; Catalyst support
• ISSN: 0166-9834; 1873-3867
• DOI: 10.1016/S0166-9834(00)84153-6

The effects, on the activity and selectivity for cracking heavy oils, of varying the alumina-silica ratio in amorphous aluminosilicate matrices for CREY, REUSY, USY, and LZ zeolites were studied using a microactivity test and two different feedstocks. With a heavy aromatic feedstock gasoline yields and octane numbers showed a pronounced maximum for matrix alumina-silica weight ratios in the range 90:10–70:30 and with CREY zeolite as the main active component. With a lighter aliphatic feedstock the gasoline yields and octane numbers were much less dependent on the alumina-silica weight ratio. The effects on pore structure and selectivity of hydrothermal treatment of conventional amorphous aluminosilicate catalysts and zeolite catalysts with amorphous silica-alumina matrices having alumina-silica weight ratios in the range 90:10–70:30 are discussed.