Role of transition metals on MoS 2 -based supported catalysts for hydrodeoxygenation (HDO) of propylguaiacol

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Role of transition metals on MoS 2 -based supported catalysts for hydrodeoxygenation (HDO) of propylguaiacol

Cheah, You Wayne, 1993 (author): Chalmers tekniska högskola,Chalmers University of Technology

Salam, Muhammad Abdus, 1983 (author): Chalmers tekniska högskola,Chalmers University of Technology

Arora, Prakhar, 1987 (author): Preem,Preem AB,Chalmers tekniska högskola,Chalmers University of Technology

Öhrman, Olov (author): Preem,Preem AB

Creaser, Derek, 1966 (author): Chalmers tekniska högskola,Chalmers University of Technology

Olsson, Louise, 1974 (author): Chalmers tekniska högskola,Chalmers University of Technology

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2021
2021
English.
In: Sustainable Energy and Fuels. - : Royal Society of Chemistry (RSC). - 2398-4902. ; 5:7, s. 2097-2113

Related links:: https://research.cha... (primary) (free); show more...; https://pubs.rsc.org...; https://doi.org/10.1...; https://research.cha...; show less...

Journal article (peer-reviewed)

Abstract Subject headings

Transition metal sulfides (TMSs) are typically used in the traditional petroleum refining industry for hydrodesulfurization (HDS) and hydrodenitrogenation (HDN) applications. Bio-oils require an upgrading process like catalytic hydrodeoxygenation (HDO) to produce advanced biofuels and chemicals. Herein, MoS /γ-Al O promoted by transition metals like nickel (Ni), copper (Cu), zinc (Zn), and iron (Fe) was evaluated for the HDO of a bio-oil model compound, 4-propylguaiacol (PG) in a batch reactor at 340 °C under 50 bar H pressure. The catalyst screening results showed that the sulfided Ni-promoted catalyst gave a high 94% yield of deoxygenated cycloalkanes, however for the sulfided Cu-promoted catalyst, 42% of phenolics remain in the reaction medium after 5 h. The results also revealed that the sulfided Zn and Fe-promoted catalysts gave a final yield of 16% and 19% at full PG conversion, respectively, for deoxygenated aromatics. A kinetic model considering the main side reactions was developed to elucidate the reaction pathway of demethoxylation and dehydroxylation of PG. The developed kinetic model was able to describe the experimental results well with a coefficient of determination of 97% for the Ni-promoted catalyst system. The absence of intermediates like 4-propylcyclohexanone and 4-propylcyclohexanol during the reaction implies that direct deoxygenation (DDO) is the dominant pathway in the deoxygenation of PG employing sulfided catalysts. The current work also demonstrated that the activity of the transition metal promoters sulfides for HDO of PG could be correlated to the yield of deoxygenated products from the hydrotreatment of Kraft lignin. 2 2 3 2

Subject headings

TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Kemiska processer (hsv//swe)
ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Chemical Process Engineering (hsv//eng)
TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Annan kemiteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Other Chemical Engineering (hsv//eng)
NATURVETENSKAP -- Kemi -- Organisk kemi (hsv//swe)
NATURAL SCIENCES -- Chemical Sciences -- Organic Chemistry (hsv//eng)

Keyword

Pyrolysis oils
guaiacol
Bio-oil

Publication and Content Type

art (subject category)
ref (subject category)

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