Effects of Fatty Acid Compositions on Heavy Oligomer Formation and Catalyst Deactivation during Deoxygenation of Triglycerides

Cited 8 time in webofscience Cited 0 time in scopus
  • Hit : 183
  • Download : 0
Deoxygenation of triglycerides (e.g., vegetable and microalgae oils) through hydro-upgrading is one of the most important routes to produce oxygen-free hydrocarbon fuels from biomass. Even though natural triglycerides are composed of fatty acids of different structures, their effects on catalytic selectivity and deactivation during deoxygenation have not been comprehensively investigated. In this study, we used three different reactant triglycerides including palm oil, soybean oil, and linseed oil for catalytic deoxygenation over Pt/gamma-Al2O3. These oils consist of fatty acids with increasing degrees of unsaturation in the order of palm oil (number of C=C per fatty acid: 0.55) < soybean oil (1.33) < linseed oil (2.18). The catalytic results showed that the increased unsaturation of the triglycerides caused enhanced formation of heavy products by oligomerization (mostly dimers) of unsaturated fatty acid derivatives through Diels Alder reaction and/or radical addition. These heavy products were readily transformed to coke species, causing catalyst deactivation. In this regard, we demonstrated that the prehydrogenation of triglycerides at a mild temperature is highly beneficial for steadily obtaining a high yield of diesel-range paraffins and retarding catalyst deactivation in deoxygenation.
Publisher
American Chemical Society (ACS)
Issue Date
2018-12
Article Type
Article; Proceedings Paper
Citation

ACS Sustainable Chemistry &amp; Engineering, v.6, no.12, pp.17168 - 17177

ISSN
2168-0485
DOI
10.1021/acssuschemeng.8b04552
URI
http://hdl.handle.net/10203/249019
Appears in Collection
CBE-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 8 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0