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3727303 
Journal Article 
Hydrocarbon Synthesis from Carbon Dioxide and Hydrogen: A Two-Step Process 
Drab, DM; Willauer, HD; Olsen, MT; Ananth, R; Mushrush, GW; Baldwin, JW; Hardy, DR; Williams, FW 
2013 
Yes 
Energy and Fuels
ISSN: 0887-0624
EISSN: 1520-5029 
27 
11 
6348-6354 
WOS:000327557800003 
CO2 hydrogenation to olefins and ethylene oligomerization were investigated in efforts to improve catalyst composition and reaction conditions needed for scale-up. The hydrogenation of CO2 to hydrocarbons is investigated over gamma- alumina-supported iron-based iron-based catalysts modified with manganese and potassium promoters and a silica-stabilized coating under fixed-bed reactor conditions to produce unsaturated hydrocarbons as feedstock chemicals for jet fuel synthesis. The stabilizer is introduced by impregnating the K/Mn/Fe on Al2O3 catalyst with tetraethylorthosilicate (TEOS) to minimize the deactivating effects of water on catalyst activity in CO2 hydrogenation. The K/Mn/Fe on Al2O3 catalyst modified with the TEOS and reduced in CO produced a lighter end fraction of olefins compared to the catalyst reduced in H-2. To increase the chain length of the olefins formed in the CO2 hydrogenation step, investigation of the oligomerization reaction is conducted in a separate experiment, where pure ethylene is used as a model olefin. Ethylene oligomerization over pelletized amorphous silica-alumina (ASA)-supported Ni catalysts demonstrated high conversion and selectivity toward the jet fuel fraction (C-8-C-16) at a very low mass hourly space velocity (MHSV).