Hydrotreating of fast pyrolysis oils from protein-rich pennycress seed presscake

Charles A. Mullen, Akwasi A. Boateng, Stephen E Reichenbach

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The fast pyrolysis oils produced from proteinaceous biomass, such as pennycress presscake differ significantly from those produced from biomass with mostly lignocellulosic composition. Those from proteinaceous biomass tend to be deoxygenated, contain more nitrogen, be less acidic and be more stable. Because their composition is different, their behavior in and products from upgrading via hydrotreating will be different. We studied the mild batch hydrogenation of the pyrolysis oil produced from pennycress presscake at ∼13.8 MPa (138 bar) H2 and 320 C over five precious metal on charcoal catalysts: two Ru/C catalysts, two Pd/C catalysts, and one Pt/C catalyst. The liquid products were characterized by elemental analysis, GC × GC/MS and NMR. The Ru catalysts were most effective at further deoxygenating the pyrolysis oils, with the Pd catalyst slightly less effective, and the Pt catalyst the least effective. None of the catalysts were highly effective for hydrodenitrogenation, though among them Pt removed the most nitrogen from the liquids. Using the best catalysts, an upgraded pyrolysis oil containing <15 wt% total heteroatom content (O + N + S) with an HHV of 37.0 MJ/mg was realized. Compared with wood pyrolysis oils upgraded at similar conditions, the upgraded pyrolysis oils from pennycress presscake had lower oxygen and total heteroatom (O, N, and S) content, had higher energy content and were closer compositionally to petroleum. The products were very rich in long aliphatic hydrocarbon chains; these large aliphatic moieties were present in both purely hydrocarbon compounds and in heteroatom containing compounds especially alkyl amides.

Original languageEnglish (US)
Pages (from-to)797-804
Number of pages8
JournalFuel
Volume111
DOIs
StatePublished - May 29 2013

Fingerprint

Seed
Oils
Pyrolysis
Proteins
Catalysts
Biomass
Hydrocarbons
Nitrogen
Chemical analysis
Charcoal
Petroleum
Liquids
Precious metals
Amides
Hydrogenation
Wood
Crude oil
Nuclear magnetic resonance
Oxygen

Keywords

  • Bio-oil upgrading
  • Hydrotreating
  • Precious metal catalysts
  • Proteinaceous biomass

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Organic Chemistry

Cite this

Hydrotreating of fast pyrolysis oils from protein-rich pennycress seed presscake. / Mullen, Charles A.; Boateng, Akwasi A.; Reichenbach, Stephen E.

In: Fuel, Vol. 111, 29.05.2013, p. 797-804.

Research output: Contribution to journalArticle

Mullen, Charles A. ; Boateng, Akwasi A. ; Reichenbach, Stephen E. / Hydrotreating of fast pyrolysis oils from protein-rich pennycress seed presscake. In: Fuel. 2013 ; Vol. 111. pp. 797-804.
@article{02606baf812e4268840ea92859b68043,
title = "Hydrotreating of fast pyrolysis oils from protein-rich pennycress seed presscake",
abstract = "The fast pyrolysis oils produced from proteinaceous biomass, such as pennycress presscake differ significantly from those produced from biomass with mostly lignocellulosic composition. Those from proteinaceous biomass tend to be deoxygenated, contain more nitrogen, be less acidic and be more stable. Because their composition is different, their behavior in and products from upgrading via hydrotreating will be different. We studied the mild batch hydrogenation of the pyrolysis oil produced from pennycress presscake at ∼13.8 MPa (138 bar) H2 and 320 C over five precious metal on charcoal catalysts: two Ru/C catalysts, two Pd/C catalysts, and one Pt/C catalyst. The liquid products were characterized by elemental analysis, GC × GC/MS and NMR. The Ru catalysts were most effective at further deoxygenating the pyrolysis oils, with the Pd catalyst slightly less effective, and the Pt catalyst the least effective. None of the catalysts were highly effective for hydrodenitrogenation, though among them Pt removed the most nitrogen from the liquids. Using the best catalysts, an upgraded pyrolysis oil containing <15 wt{\%} total heteroatom content (O + N + S) with an HHV of 37.0 MJ/mg was realized. Compared with wood pyrolysis oils upgraded at similar conditions, the upgraded pyrolysis oils from pennycress presscake had lower oxygen and total heteroatom (O, N, and S) content, had higher energy content and were closer compositionally to petroleum. The products were very rich in long aliphatic hydrocarbon chains; these large aliphatic moieties were present in both purely hydrocarbon compounds and in heteroatom containing compounds especially alkyl amides.",
keywords = "Bio-oil upgrading, Hydrotreating, Precious metal catalysts, Proteinaceous biomass",
author = "Mullen, {Charles A.} and Boateng, {Akwasi A.} and Reichenbach, {Stephen E}",
year = "2013",
month = "5",
day = "29",
doi = "10.1016/j.fuel.2013.04.075",
language = "English (US)",
volume = "111",
pages = "797--804",
journal = "Fuel",
issn = "0016-2361",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Hydrotreating of fast pyrolysis oils from protein-rich pennycress seed presscake

AU - Mullen, Charles A.

AU - Boateng, Akwasi A.

AU - Reichenbach, Stephen E

PY - 2013/5/29

Y1 - 2013/5/29

N2 - The fast pyrolysis oils produced from proteinaceous biomass, such as pennycress presscake differ significantly from those produced from biomass with mostly lignocellulosic composition. Those from proteinaceous biomass tend to be deoxygenated, contain more nitrogen, be less acidic and be more stable. Because their composition is different, their behavior in and products from upgrading via hydrotreating will be different. We studied the mild batch hydrogenation of the pyrolysis oil produced from pennycress presscake at ∼13.8 MPa (138 bar) H2 and 320 C over five precious metal on charcoal catalysts: two Ru/C catalysts, two Pd/C catalysts, and one Pt/C catalyst. The liquid products were characterized by elemental analysis, GC × GC/MS and NMR. The Ru catalysts were most effective at further deoxygenating the pyrolysis oils, with the Pd catalyst slightly less effective, and the Pt catalyst the least effective. None of the catalysts were highly effective for hydrodenitrogenation, though among them Pt removed the most nitrogen from the liquids. Using the best catalysts, an upgraded pyrolysis oil containing <15 wt% total heteroatom content (O + N + S) with an HHV of 37.0 MJ/mg was realized. Compared with wood pyrolysis oils upgraded at similar conditions, the upgraded pyrolysis oils from pennycress presscake had lower oxygen and total heteroatom (O, N, and S) content, had higher energy content and were closer compositionally to petroleum. The products were very rich in long aliphatic hydrocarbon chains; these large aliphatic moieties were present in both purely hydrocarbon compounds and in heteroatom containing compounds especially alkyl amides.

AB - The fast pyrolysis oils produced from proteinaceous biomass, such as pennycress presscake differ significantly from those produced from biomass with mostly lignocellulosic composition. Those from proteinaceous biomass tend to be deoxygenated, contain more nitrogen, be less acidic and be more stable. Because their composition is different, their behavior in and products from upgrading via hydrotreating will be different. We studied the mild batch hydrogenation of the pyrolysis oil produced from pennycress presscake at ∼13.8 MPa (138 bar) H2 and 320 C over five precious metal on charcoal catalysts: two Ru/C catalysts, two Pd/C catalysts, and one Pt/C catalyst. The liquid products were characterized by elemental analysis, GC × GC/MS and NMR. The Ru catalysts were most effective at further deoxygenating the pyrolysis oils, with the Pd catalyst slightly less effective, and the Pt catalyst the least effective. None of the catalysts were highly effective for hydrodenitrogenation, though among them Pt removed the most nitrogen from the liquids. Using the best catalysts, an upgraded pyrolysis oil containing <15 wt% total heteroatom content (O + N + S) with an HHV of 37.0 MJ/mg was realized. Compared with wood pyrolysis oils upgraded at similar conditions, the upgraded pyrolysis oils from pennycress presscake had lower oxygen and total heteroatom (O, N, and S) content, had higher energy content and were closer compositionally to petroleum. The products were very rich in long aliphatic hydrocarbon chains; these large aliphatic moieties were present in both purely hydrocarbon compounds and in heteroatom containing compounds especially alkyl amides.

KW - Bio-oil upgrading

KW - Hydrotreating

KW - Precious metal catalysts

KW - Proteinaceous biomass

UR - http://www.scopus.com/inward/record.url?scp=84879105363&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84879105363&partnerID=8YFLogxK

U2 - 10.1016/j.fuel.2013.04.075

DO - 10.1016/j.fuel.2013.04.075

M3 - Article

AN - SCOPUS:84879105363

VL - 111

SP - 797

EP - 804

JO - Fuel

JF - Fuel

SN - 0016-2361

ER -