Hydrogenation of carbon dioxide over K-Promoted FeCo bimetallic catalysts prepared from mixed metal oxalates
Gnanamani, Muthu Kumaran Hamdeh, Hussein H. Jacobs, Gary Shafer, Wilson D. Hopps, Shelley D. Thomas, Gerald A. Davis, Burtron H.
Gnanamani, Muthu Kumaran
Hamdeh, Hussein H.
Jacobs, Gary
Shafer, Wilson D.
Hopps, Shelley D.
Thomas, Gerald A.
Davis, Burtron H.
Citations
Altmetric:
Other Names
Location
Time Period
Advisors
Original Date
Digitization Date
Issue Date
2017-04-07
Type
Article
Genre
Keywords
Bimetallic catalysts,Carbon dioxide,Hydrogenation,Cobalt,Iron,Potassium
Subjects (LCSH)
Citation
M. K. Gnanamani, H. H. Hamdeh, G. Jacobs, W. D. Shafer, S. D. Hopps, G. A. Thomas, B. H. Davis, ChemCatChem 2017, 9, 1303
Abstract
The hydrogenation of carbon dioxide over K-promoted FeCo bimetallic catalysts prepared by sequential oxalate decomposition and carburization of FeCo with CO was studied in a fixed-bed reactor at 240 degrees C and 1.2MPa. The initial CO2 conversion was found to be dependent on K loading, whereas both unpromoted and K-promoted FeCo catalysts (except 90Fe10Co3.0K) exhibited similar levels of CO2 conversion after a few hours of time on stream. A decarburization study on freshly activated and used FeCo suggests that potassium increases the stability of iron carbides and graphitic carbon under a reducing atmosphere. Also, K addition tends to decrease the hydrogenation function of FeCo bimetallic catalysts and, thus, controls product selectivity. Under similar CO2 conversions, potassium enhanced acetic acid formation while suppressing ethanol production, which indicates that a common intermediate might be responsible for the changes observed with C-2 oxygenates.
Table of Contents
Description
Click on the DOI link to access the article (may not be free).
Publisher
John Wiley & Sons, Inc.
Journal
Book Title
Series
CHEMCATCHEM;v.9:no.7
Digital Collection
Finding Aid URL
Use and Reproduction
Archival Collection
PubMed ID
DOI
ISSN
1867-3880