Ail, Snehesh Shivananda and Benedetti, Vittoria and Baratieri, Marco and Dasappa, Srinivasaiah (2018) Fuel-Rich Combustion Synthesized Co/Al2O3 Catalysts for Wax and Liquid Fuel Production via Fischer-Tropsch Reaction. In: INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 57 (11). pp. 3833-3843.
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Alumina supported cobalt catalysts were synthesized for Fischer-Tropsch (FT) reaction using combustion synthesis (CS) method via the redox reaction of hexamethylenetetramine and cobalt nitrate with equivalence ratios (phi) of 1, 1.2, and 1.5. Higher equivalence ratios (phi > 1.0) were selected to increase the synthesis temperature and thereby decrease the formation of cobalt aluminates. Chemisorption and XPS studies of CS(phi = 1.2) and CS(phi = 1.5) catalysts showed high degree of reduction, high metal dispersion, and decreased formation of cobalt aluminates compared to CS(phi = 1) catalysts. Higher FT activity was observed for catalysts synthesized with equivalence ratios of 1.2 and 1.5 compared to the catalysts synthesized with phi = 1. Simultaneously, the hydrocarbon product spectrum shifted from predominantly waxes (C24+) for CS(phi = 1) catalysts to mixed fractions of liquid fuel (C-6-C-24) and waxes for CS(phi = 1.2) and CS(phi = 1.5) catalysts. This work investigates the impact of CS stoichiometry on catalyst properties, in particular the metal support interaction, and its outcome on FT activity and selectivity.
| Item Type: | Journal Article |
|---|---|
| Publication: | INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH |
| Additional Information: | Copy right for this article belong to AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA |
| Department/Centre: | Division of Mechanical Sciences > Centre for Sustainable Technologies (formerly ASTRA) |
| Date Deposited: | 16 Apr 2018 20:10 |
| Last Modified: | 06 Oct 2018 13:10 |
| URI: | http://eprints.iisc.ac.in/id/eprint/59576 |
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