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Investigating the e...
Investigating the effect of Fe as a poison for catalytic HDO over sulfided NiMo alumina catalysts
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- Arora, Prakhar, 1987 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Ojagh, Houman, 1976 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Woo, Jung Won, 1980 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Lind Grennfelt, Eva (author)
- Preem,Preem AB
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- Olsson, Louise, 1974 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Creaser, Derek, 1966 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- Elsevier BV, 2018
- 2018
- English.
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In: Applied Catalysis B: Environmental. - : Elsevier BV. - 0926-3373 .- 1873-3883. ; 227, s. 240-251
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Abstract
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- The effect of iron (Fe) as poison present in renewable feeds was studied during hydrodeoxygenation (HDO) overmolybdenum based sulfided catalysts. The study was carried out at 6 MPa and 325 °C in batch reaction conditions. Different concentrations of Fe in the feed were tested over MoS2/Al2O3 and NiMoS/Al2O3. A notable drop in activity for the conversion of oxygenates was observed for both catalyst systems with an increased concentration of Fe in the feed. However, the changes in selectivity of products was opposite for unpromoted and Nipromoted catalysts. In the case of the NiMoS catalyst, at higher Fe concentration, the decarbonated product (C17 hydrocarbons) decreased while the direct hydrodeoxygenation product (C18 hydrocarbons)increased. On the contrary, for the base catalyst (MoS2), there was a decrease in the yield of direct hydrodeoxygenation (C18 hydrocarbons) products and an increase in yield of decarbonated products (C17 hydrocarbons). These sulfided catalysts have different sites for these two different reaction routes and they interacted differently with Fe during the deactivation process. With surface deposition of Fe, the ability of these catalysts to create active sites i.e. via sulfur vacancies deteriorated. TEM-EDX results suggested that the effect of Ni as a promoter for the decarbonation route was nullified and a resultant FeMo phase explains the drop in activity and change in selectivity.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Kemiska processer (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Chemical Process Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Naturresursteknik -- Energisystem (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Environmental Engineering -- Energy Systems (hsv//eng)
Keyword
- hydrodeoxygenation
- NiMo
- deactivation
- characterization
- HDO
- MoS2
- Fatty acids
Publication and Content Type
- art (subject category)
- ref (subject category)
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Arora, Prakhar, ...
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Ojagh, Houman, 1 ...
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Woo, Jung Won, 1 ...
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Lind Grennfelt, ...
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Olsson, Louise, ...
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Creaser, Derek, ...
- About the subject
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Chemical Enginee ...
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and Chemical Process ...
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Environmental En ...
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and Energy Systems
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Applied Catalysi ...
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Chalmers University of Technology