Antioxidants from Slow Pyrolysis Bio-Oil of Birch Wood: Application for Biodiesel and Biobased Lubricants

Sriraam R. Chandrasekaran, Dheeptha Murali, Karen A. Marley, Richard A. Larson, Kenneth M. Doll, Bryan R. Moser, John Scott, Brajendra K. Sharma

Research output: Contribution to journalArticle

Abstract

Birch wood was slowly pyrolyzed to produce bio-oil and biochar. Slow pyrolysis conditions including reaction temperature, residence time, and particle size of the feed were optimized to maximize bio-oil yield. Particle size had an insignificant effect, whereas yields of up to 56% were achieved using an optimized reaction temperature of 450 °C and a residence time of 2 h. Bio-oil was also produced from commercial Kraft lignin and was compared to the bio-oil obtained from birch wood. These bio-oils were characterized for elemental composition, phenolic compound identification using GC-MS, boiling point distribution using GC-FID, and molecular weight distribution using GPC. Simulated distillation indicated that a majority of the bio-oil compounds were found in the fraction between 200 and 300 °C, followed by fractions <200 °C and 300-400 °C. Phenolic fractions extracted from bio-oil using an alkali method were evaluated as antioxidant additives in soy biodiesel using Mihaljevic, Rancimat and PDSC test methods. The phenolic extract showed similar antioxidant activity as the commercial antioxidant butylated hydroxytoluene (BHT) typically used in biodiesel. These phenolic extracts were also evaluated as antioxidants in soybean oils for formulating biolubricants and exhibited improved oxidation stability similar to what was observed in soy biodiesel. It was found that many of the monomeric constituents of the phenolic mixture showed little or no antioxidant activity. However, a series of phenols present in the bio-oils exhibited molecular weights (MWs) of 302, 316, 330, and 344 corresponding to a group of dimers, which may be responsible for the observed antioxidant properties.

Original languageEnglish (US)
Pages (from-to)1414-1421
Number of pages8
JournalACS Sustainable Chemistry and Engineering
Volume4
Issue number3
DOIs
StatePublished - Mar 7 2016

Fingerprint

oil
Antioxidants
antioxidant
Biodiesel
Calcaneus
Pyrolysis
Particle size
Temperature
Acetanilides
Pacific Islands
pyrolysis
residence time
particle size
temperature
Soybean oil
Boiling point
Molecular weight distribution
Lignin
Distillation
Dimers

Keywords

  • Antioxidants
  • Bio-oil
  • Biodiesel
  • Biolubricant
  • Birch wood
  • Lignin
  • Polyphenolic
  • Pyrolysis

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Environmental Chemistry

Cite this

Antioxidants from Slow Pyrolysis Bio-Oil of Birch Wood : Application for Biodiesel and Biobased Lubricants. / Chandrasekaran, Sriraam R.; Murali, Dheeptha; Marley, Karen A.; Larson, Richard A.; Doll, Kenneth M.; Moser, Bryan R.; Scott, John; Sharma, Brajendra K.

In: ACS Sustainable Chemistry and Engineering, Vol. 4, No. 3, 07.03.2016, p. 1414-1421.

Research output: Contribution to journalArticle

Chandrasekaran, Sriraam R.; Murali, Dheeptha; Marley, Karen A.; Larson, Richard A.; Doll, Kenneth M.; Moser, Bryan R.; Scott, John; Sharma, Brajendra K. / Antioxidants from Slow Pyrolysis Bio-Oil of Birch Wood : Application for Biodiesel and Biobased Lubricants.

In: ACS Sustainable Chemistry and Engineering, Vol. 4, No. 3, 07.03.2016, p. 1414-1421.

Research output: Contribution to journalArticle

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