Stabilizing Catalytic Pathways via Redundancy: Selective Reduction of Microalgae Oil to Alkanes
Abstract
A new route to convert crude microalgae oils using ZrO(2)-promoted Ni catalysts into diesel-range alkanes in a cascade reaction is presented. Ni nanoparticles catalyze the selective cleavage of the C-O of fatty acid esters, leading to the hydrogenolysis of triglycerides. Hydrogenation of the resulting fatty acids to aldehydes (rate-determining step) is uniquely catalyzed via two parallel pathways, one via aldehyde formation on metallic Ni and the second via a synergistic action by Ni and ZrO(2) through adsorbing the carboxylic groups at the oxygen vacancies of ZrO(2) to form carboxylates and subsequently abstracting the α-hydrogen atom to produce ketene, which is in turn hydrogenated to aldehydes and decarbonylated on Ni nanoparticles.
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Support acidity (HBEA zeolite or zirconia) plays a key role in the reaction kinetics of nickel-based algae oil deoxygenation.
“support acidity (HBEA zeolite or zirconia) was shown in mechanistic studies with model compounds to play a key role in the reaction kinetics”
From Catalytic Hydroprocessing of Single-Cell Oils to Hydrocarbon Fuels: Converting microbial lipids to fuels is a promising approach to replace fossil fuels (2021) · cites this paper as [93]
The algae oil did not deactivate the Ni/ZrO2 catalyst for at least 72 h TOS.
“did not deactivate the catalysts for at least 72 h (for Ni/ZrO2) (93)”
From Catalytic Hydroprocessing of Single-Cell Oils to Hydrocarbon Fuels: Converting microbial lipids to fuels is a promising approach to replace fossil fuels (2021) · cites this paper as [93]
Nickel particle size is key to catalyst activity in nickel-based algae oil deoxygenation.
“the nickel particle size was also key to catalyst activity”
From Catalytic Hydroprocessing of Single-Cell Oils to Hydrocarbon Fuels: Converting microbial lipids to fuels is a promising approach to replace fossil fuels (2021) · cites this paper as [93]
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- Authors
- Peng, B., Yuan, X., Zhao, C., & Lercher, J. A.
- Affiliations
- Technical University of Munich (DE)
- Corresponding author
- Lercher, Johannes A.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2012-05-25
- Volume
- 134
- Issue
- 22
- Pages
- 9400-9405
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2010685748
- Cited by
- 378
- References
- 18
- Citations by year
- 2026: 19 · 2025: 26 · 2024: 22 · 2023: 29 · 2022: 29 · 2021: 24 · 2020: 27 · 2019: 32 · 2018: 33 · 2017: 31 · 2016: 28 · 2015: 35 · 2014: 24 · 2013: 17 · 2012: 2
- FWCI
- 38.15
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of the American Chemical Society (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Engineering › Mechanical Engineering › Catalysis and Hydrodesulfurization Studies
- Physical Sciences › Chemical Engineering › Catalysis › Catalysts for Methane Reforming
- Physical Sciences › Engineering › Biomedical Engineering › Catalysis for Biomass Conversion
- Keywords
- microalgae oil, selective hydrogenolysis, Ni/ZrO2 catalyst, fatty acid hydrogenation, ketene formation, oxygen vacancies, carboxylate formation, cascade reactions, decarbonylation
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