Abstract
Fe-Cu catalysts were applied in the production of high-calorie synthetic natural gas (HC-SNG), wherein a proper level of C2–C4 hydrocarbon selectivity must be secured. The Fe-Cu catalysts were activated by reduction under diluted CO gas before the reaction, and their catalytically active Fe phases changed according to the reduction temperature: Fe3O4 formed when reduced at 300 °C, carbon-deficient FeCx at 400 °C and Fe3C at 500 °C. Iron carbide catalysts achieved stronger CO adsorption and higher BET surface area than Fe3O4 catalysts, which resulted in higher CO conversion. The carbon-deficient FeCx was metal-like in its electron structure due to the low number of bonded carbons, and it was attributed to the highest CO and H2 conversion of FC15-400R by providing H2 activation ability. The Cn (n ≥ 2) selectivity or carbon chain growth of the hydrocarbons increased as the carburization degree of the active Fe phase increased, which was associated with an increase in the CO chemisorption strength. The impregnated Cu exerted little influence on the product selectivity, but it promoted hydrogen adsorption, thereby improving the paraffin-to-olefin ratio of the produced hydrocarbons.
| Original language | English |
|---|---|
| Pages (from-to) | 190-198 |
| Number of pages | 9 |
| Journal | Journal of Molecular Catalysis A: Chemical |
| Volume | 425 |
| DOIs | |
| Publication status | Published - 2016 Dec 15 |
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Keywords
- Fe-Cu catalyst
- Heating value
- High-calorie synthetic natural gas
ASJC Scopus subject areas
- Catalysis
- Process Chemistry and Technology
- Physical and Theoretical Chemistry
Cite this
Production of high-calorie synthetic natural gas using copper-impregnated iron catalysts. / Lee, Yong Hee; Lee, Dae Won; Lee, Kwan Young.
In: Journal of Molecular Catalysis A: Chemical, Vol. 425, 15.12.2016, p. 190-198.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Production of high-calorie synthetic natural gas using copper-impregnated iron catalysts
AU - Lee, Yong Hee
AU - Lee, Dae Won
AU - Lee, Kwan Young
PY - 2016/12/15
Y1 - 2016/12/15
N2 - Fe-Cu catalysts were applied in the production of high-calorie synthetic natural gas (HC-SNG), wherein a proper level of C2–C4 hydrocarbon selectivity must be secured. The Fe-Cu catalysts were activated by reduction under diluted CO gas before the reaction, and their catalytically active Fe phases changed according to the reduction temperature: Fe3O4 formed when reduced at 300 °C, carbon-deficient FeCx at 400 °C and Fe3C at 500 °C. Iron carbide catalysts achieved stronger CO adsorption and higher BET surface area than Fe3O4 catalysts, which resulted in higher CO conversion. The carbon-deficient FeCx was metal-like in its electron structure due to the low number of bonded carbons, and it was attributed to the highest CO and H2 conversion of FC15-400R by providing H2 activation ability. The Cn (n ≥ 2) selectivity or carbon chain growth of the hydrocarbons increased as the carburization degree of the active Fe phase increased, which was associated with an increase in the CO chemisorption strength. The impregnated Cu exerted little influence on the product selectivity, but it promoted hydrogen adsorption, thereby improving the paraffin-to-olefin ratio of the produced hydrocarbons.
AB - Fe-Cu catalysts were applied in the production of high-calorie synthetic natural gas (HC-SNG), wherein a proper level of C2–C4 hydrocarbon selectivity must be secured. The Fe-Cu catalysts were activated by reduction under diluted CO gas before the reaction, and their catalytically active Fe phases changed according to the reduction temperature: Fe3O4 formed when reduced at 300 °C, carbon-deficient FeCx at 400 °C and Fe3C at 500 °C. Iron carbide catalysts achieved stronger CO adsorption and higher BET surface area than Fe3O4 catalysts, which resulted in higher CO conversion. The carbon-deficient FeCx was metal-like in its electron structure due to the low number of bonded carbons, and it was attributed to the highest CO and H2 conversion of FC15-400R by providing H2 activation ability. The Cn (n ≥ 2) selectivity or carbon chain growth of the hydrocarbons increased as the carburization degree of the active Fe phase increased, which was associated with an increase in the CO chemisorption strength. The impregnated Cu exerted little influence on the product selectivity, but it promoted hydrogen adsorption, thereby improving the paraffin-to-olefin ratio of the produced hydrocarbons.
KW - Fe-Cu catalyst
KW - Heating value
KW - High-calorie synthetic natural gas
UR - http://www.scopus.com/inward/record.url?scp=84992497878&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84992497878&partnerID=8YFLogxK
U2 - 10.1016/j.molcata.2016.10.013
DO - 10.1016/j.molcata.2016.10.013
M3 - Article
AN - SCOPUS:84992497878
VL - 425
SP - 190
EP - 198
JO - Journal of Molecular Catalysis A: Chemical
JF - Journal of Molecular Catalysis A: Chemical
SN - 1381-1169
ER -