Influence of gas feed composition and pressure on the catalytic conversion of CO{sub 2} to hydrocarbons using a traditional cobalt-based Fischer-Tropsch catalyst
- Naval Research Laboratory, Washington, DC (United States). Navy Technology Center for Safety and Survivability Branch
The hydrogenation of CO{sub 2} using a traditional Fischer-Tropsch Co-Pt/Al{sub 2}O{sub 3} catalyst for the production of valuable hydrocarbon materials is investigated. The ability to direct product distribution was measured as a function of different feed gas ratios of H{sub 2} and CO{sub 2} (3:1, 2:1, and 1:1) as well as operating pressures (ranging from 450 to 150 psig). As the feed gas ratio was changed from 3:1 to 2:1 and 1:1, the production distribution shifted from methane toward higher chain hydrocarbons. This change in feed gas ratio is believed to lower the methanation ability of Co in favor of chain growth, with possibly two different active sites for methane and C2-C4 products. Furthermore, with decreasing pressure, the methane conversion drops slightly in favor of C{sub 2}-C{sub 4} paraffins. Even though under certain reaction conditions product distribution can be shifted slightly away from the formation of methane, the catalyst studied behaves like a methanation catalyst in the hydrogenation of CO{sub 2}. 36 refs., 2 figs., 4 tabs.
- OSTI ID:
- 21233745
- Journal Information:
- Energy and Fuels, Vol. 23, Issue 8; ISSN 0887-0624
- Country of Publication:
- United States
- Language:
- English
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