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Effect of surface composition of Fe catalyst on the activity for the production of high-calorie synthetic natural gas (SNG)

Authors
Lee, Yong HeeLee, Kwan-Young
Issue Date
2월-2017
Publisher
KOREAN INSTITUTE CHEMICAL ENGINEERS
Keywords
Methanation; Fischer-Tropsch; Fe Catalyst; Iron Carbide; Paraffin-to-olefin Ratio
Citation
KOREAN JOURNAL OF CHEMICAL ENGINEERING, v.34, no.2, pp.320 - 327
Indexed
SCIE
SCOPUS
KCI
Journal Title
KOREAN JOURNAL OF CHEMICAL ENGINEERING
Volume
34
Number
2
Start Page
320
End Page
327
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/84847
DOI
10.1007/s11814-016-0272-6
ISSN
0256-1115
Abstract
An Fe2O3 catalyst was applied to the production of high-calorie synthetic natural gas (SNG). With this catalyst, the product distribution changed as the surface composition of the Fe2O3 catalyst changed. The effect of these changes on the catalytic activity was investigated. The active phases of the Fe2O3 catalyst were a mixture of low-carbon FeCx and Fe3C, which was maintained for 10 h, accompanied by the regeneration of Fe3O4. The surface Fe concentration increased after 10 h reaction, and this increased the CO conversion. In addition, the amounts of adsorbed C2H4 and C3H6 increased, which resulted in an increase in carbon chain growth. The surface concentration of oxygen also increased due to the regeneration of Fe3O4, thus reducing the C3H6 adsorption strength; in contrast, C2H4 adsorption increased, resulting in an enhanced paraffin-to-olefin (p/o) ratio for C-2 hydrocarbons and reduced p/o ratio for C-3 hydrocarbons.
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Lee, Kwan Young
공과대학 (화공생명공학과)
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