Effect of Zeolite on Fischer–Tropsch Synthesis in the Presence of a Catalyst Based on Skeletal Cobalt

• Published in: Petroleum chemistry 2020, Vol.60 (1), p.69-74
• Main Authors: Asalieva, E. Yu, Kul’chakovskaya, E. V., Sineva, L. V., Mordkovich, V. Z.
• Format: Article
• Language: English
• Subjects: Alkenes; Aluminum oxide; Boehmite; Catalysts; Chemical synthesis; Chemistry; Chemistry and Materials Science; Cobalt; Fischer-Tropsch process; Industrial Chemistry/Chemical Engineering; Paraffins; Silicon dioxide; Somatotropin; Zeolites
• ISSN: 0965-5441; 1555-6239
• DOI: 10.1134/S0965544120010028

The joint effect of skeletal cobalt and zeolite on the main catalytic parameters of a pelletized composite catalyst has been studied. All samples contain 50 wt % fine metallic aluminum powder. The amounts of other components are as follows: 20–30 wt % binder (boehmite), 5–20 wt % Beta zeolite in the H form (SiO 2 /Al 2 O 3 = 38), and 10–20 wt % fine skeletal cobalt. The reference catalyst does not contain any zeolite. All the catalysts exhibit activity in Fischer–Tropsch synthesis and secondary transformations, the intensity of which depends on the zeolite/cobalt ratio. The composition of the resulting hydrocarbons (HCs) varies over a wide range; in particular, the content of n -paraffins and olefins is 39–88 and 3–38%, respectively. The chain growth probability varies in a range of 0.65–0.83 depending on the zeolite/cobalt ratio and the synthesis conditions. It has been shown that the catalysts studied are superior advantage to other cobalt–zeolite catalysts in CO conversion, specific activity, productivity, and stability.