Hydrocarbon Synthesis from Carbon Dioxide and Hydrogen: A Two-Step Process

reportActive / Technical Report | Accession Number: ADA585830 | Open PDF

Abstract:

CO2 hydrogenation to olefins and ethylene oligomerization was investigated in efforts to improve catalyst composition and reaction conditions needed for scale-up. The hydrogenation of CO2 to hydrocarbons is investigated over -alumina-supported 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 KMnFe on Al2O3 catalyst with tetraethylorthosilicate TEOS to minimize the deactivating effects of water on catalyst activity in CO2 hydrogenation. The KMnFe on Al2O3 catalyst modified with the TEOS and reduced in CO produced a lighter end fraction of olefins compared with the catalyst reduced in H2. To increase the chain length of the olefins formed in the CO2 hydrogenation step, investigation of 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 towards the jet fuel fraction C8-C16 at very low MHSV.

Author(s):
Drab, David M. ; Willauer, Heather D. ; Olsen, Matthew T. ; Ananth, Ramagopal ; Mushhrush, George W. ; Baldwin, Jeffrey W. ; Hardy, Dennis R. ; Williams, Frederick W.
Author Organization(s):
NAVAL RESEARCH LAB WASHINGTON DC MATERIALS SCIENCE AND TECHNOLOGY DIV
Descriptive Note:
Journal article
Supplementary Note:
Published in Energy & Fuels, 14 Aug 2013. The original document contains color images. Prepared in collaboration with NRL's Chemistry and Acoustics Divisions, Washington, DC. Prepared in cooperation with Nova Research Inc., Alexandria, VA. Sponsored in part by ONR.
Pagination:
0018

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Monitor Series:
NRL
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_5.3_Planning; JCA_6_Net Centric; JCA_6.4.1_Secure Information Exchange; JCA_8_Building Partnerships; JCA_6.3.3_Spectrum Management; JCA_6.4_Information Assurance; JCA_8.2_Shape
Modernization Areas:
Fully Networked C3
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*CARBON DIOXIDE, *HYDROCARBONS, *HYDROGEN, *SYNTHESIS(CHEMISTRY), ALUMINUM, CALCINATION, CATALYSTS, ETHYLENE, HYDROGENATION, NICKEL, OLEFIN POLYMERS, OLIGOMERS, SILICON, VELOCITY
Field(s)/Group(s):
Inorganic Chemistry, Organic Chemistry, Physical Chemistry
Keyword(s):
TEOS(TETRAETHYLORTHOSILICATES), ASA(AMORPHOUS SILICA ALUMINA), CARBON DIOXIDE HYDROGENATION, FIXED BED REACTORS, OLEFIN PARAFFIN RATIO, GHSV(GAS HOURLY SPACE VELOCITY), MHSV(MASS HOURLY SPACE VELOCITY)
Report Date:
2013 Aug 14
Creation Date:
2013 Oct 23