Catalytic cracking of sterol-rich yeast lipid

Jonathan L. Wagner, Valeska P. Ting, Christopher J. Chuck

Research output: Contribution to journalArticle

3 Citations (Scopus)
75 Downloads (Pure)

Abstract

Microbial lipids offer a promising feedstock for renewable biofuels. However, one of the major concerns with their conversion from lipids into suitable fuels is the high sterol content of the lipid. This is especially problematic for lipids obtained from oleaginous yeasts, as there are some indications that the sterol content could inhibit catalyst performance during hydrotreating. In this investigation a sterol-rich model feedstock (a 50:50 mixture of cholesterol and rapeseed oil, “RC50”) and an unrefined microbial lipid derived from the oleaginous yeast Metschkownia pulcherrima were converted to a diesel-like fuel in a single step via catalytic cracking. Far from reducing catalyst performance the cracking of the sterol groups liberated hydrogen, resulting in a reduction in the olefin content as well as an increase in the aromatic content of the fuel. The cracking of RC50 over Pd/C resulted in a fuel with a comparable product distribution to ultra-low sulphur diesel (ULSD), with high levels of linear alkanes and approximately 10 wt% aromatics. Cracking of unrefined yeast lipid over Pd/C was shown to result in an energy dense, hydrocarbon fuel suitable for marine applications (unblended) or a road transport fuel at 50% v/v blends with ULSD.
Original languageEnglish
Pages (from-to)315-323
Number of pages9
JournalFuel
Volume130
Early online date26 Apr 2014
DOIs
Publication statusPublished - 15 Aug 2014

Fingerprint

Catalytic cracking
Sterols
Yeast
Lipids
Sulfur
Feedstocks
Marine applications
Catalysts
Alkanes
Biofuels
Cholesterol
Alkenes
Hydrocarbons
Paraffins
Olefins
Hydrogen

Cite this

Catalytic cracking of sterol-rich yeast lipid. / Wagner, Jonathan L.; Ting, Valeska P.; Chuck, Christopher J.

In: Fuel, Vol. 130, 15.08.2014, p. 315-323.

Research output: Contribution to journalArticle

Wagner, Jonathan L. ; Ting, Valeska P. ; Chuck, Christopher J. / Catalytic cracking of sterol-rich yeast lipid. In: Fuel. 2014 ; Vol. 130. pp. 315-323.
@article{6264c3683ff74594b8c4f813aba9dba3,
title = "Catalytic cracking of sterol-rich yeast lipid",
abstract = "Microbial lipids offer a promising feedstock for renewable biofuels. However, one of the major concerns with their conversion from lipids into suitable fuels is the high sterol content of the lipid. This is especially problematic for lipids obtained from oleaginous yeasts, as there are some indications that the sterol content could inhibit catalyst performance during hydrotreating. In this investigation a sterol-rich model feedstock (a 50:50 mixture of cholesterol and rapeseed oil, “RC50”) and an unrefined microbial lipid derived from the oleaginous yeast Metschkownia pulcherrima were converted to a diesel-like fuel in a single step via catalytic cracking. Far from reducing catalyst performance the cracking of the sterol groups liberated hydrogen, resulting in a reduction in the olefin content as well as an increase in the aromatic content of the fuel. The cracking of RC50 over Pd/C resulted in a fuel with a comparable product distribution to ultra-low sulphur diesel (ULSD), with high levels of linear alkanes and approximately 10 wt{\%} aromatics. Cracking of unrefined yeast lipid over Pd/C was shown to result in an energy dense, hydrocarbon fuel suitable for marine applications (unblended) or a road transport fuel at 50{\%} v/v blends with ULSD.",
author = "Wagner, {Jonathan L.} and Ting, {Valeska P.} and Chuck, {Christopher J.}",
year = "2014",
month = "8",
day = "15",
doi = "10.1016/j.fuel.2014.04.048",
language = "English",
volume = "130",
pages = "315--323",
journal = "Fuel",
issn = "0016-2361",
publisher = "Elsevier",

}

TY - JOUR

T1 - Catalytic cracking of sterol-rich yeast lipid

AU - Wagner, Jonathan L.

AU - Ting, Valeska P.

AU - Chuck, Christopher J.

PY - 2014/8/15

Y1 - 2014/8/15

N2 - Microbial lipids offer a promising feedstock for renewable biofuels. However, one of the major concerns with their conversion from lipids into suitable fuels is the high sterol content of the lipid. This is especially problematic for lipids obtained from oleaginous yeasts, as there are some indications that the sterol content could inhibit catalyst performance during hydrotreating. In this investigation a sterol-rich model feedstock (a 50:50 mixture of cholesterol and rapeseed oil, “RC50”) and an unrefined microbial lipid derived from the oleaginous yeast Metschkownia pulcherrima were converted to a diesel-like fuel in a single step via catalytic cracking. Far from reducing catalyst performance the cracking of the sterol groups liberated hydrogen, resulting in a reduction in the olefin content as well as an increase in the aromatic content of the fuel. The cracking of RC50 over Pd/C resulted in a fuel with a comparable product distribution to ultra-low sulphur diesel (ULSD), with high levels of linear alkanes and approximately 10 wt% aromatics. Cracking of unrefined yeast lipid over Pd/C was shown to result in an energy dense, hydrocarbon fuel suitable for marine applications (unblended) or a road transport fuel at 50% v/v blends with ULSD.

AB - Microbial lipids offer a promising feedstock for renewable biofuels. However, one of the major concerns with their conversion from lipids into suitable fuels is the high sterol content of the lipid. This is especially problematic for lipids obtained from oleaginous yeasts, as there are some indications that the sterol content could inhibit catalyst performance during hydrotreating. In this investigation a sterol-rich model feedstock (a 50:50 mixture of cholesterol and rapeseed oil, “RC50”) and an unrefined microbial lipid derived from the oleaginous yeast Metschkownia pulcherrima were converted to a diesel-like fuel in a single step via catalytic cracking. Far from reducing catalyst performance the cracking of the sterol groups liberated hydrogen, resulting in a reduction in the olefin content as well as an increase in the aromatic content of the fuel. The cracking of RC50 over Pd/C resulted in a fuel with a comparable product distribution to ultra-low sulphur diesel (ULSD), with high levels of linear alkanes and approximately 10 wt% aromatics. Cracking of unrefined yeast lipid over Pd/C was shown to result in an energy dense, hydrocarbon fuel suitable for marine applications (unblended) or a road transport fuel at 50% v/v blends with ULSD.

U2 - 10.1016/j.fuel.2014.04.048

DO - 10.1016/j.fuel.2014.04.048

M3 - Article

VL - 130

SP - 315

EP - 323

JO - Fuel

JF - Fuel

SN - 0016-2361

ER -