4.7 Article

Preliminary Studies of Bio-oil from Fast Pyrolysis of Coconut Fibers

Journal

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 61, Issue 28, Pages 6812-6821

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/jf401379s

Keywords

biomass; pyrolysis; coconut fibers; GCxGC/TOF-MS; GC/qMS; phenols; ketones

Funding

  1. FINEP
  2. CNPq
  3. Petrobras

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This work studied fast pyrolysis as a way to use the residual fiber obtained from the shells of coconut (Cocos nucifera L var. Dwarf, from Aracaju, northeastern Brazil). The bio-oil produced by fast pyrolysis and the aqueous phase (formed during the pyrolysis) were characterized by GC/qMS and GCXGC/TOF-MS. Many oxygenated compounds such as phenols, aldehydes, and ketones were identified in the extracts obtained in both phases, with a high predominance of phenolic compounds, mainly alkylphenols. Eighty-one compounds were identified in the bio-oil and 42 in the aqueous phase using GC/qMS, and 95 and 68 in the same samples were identified by GCxGC/TOF-MS. The better performance of GCXGC/TOF-MS was due to the possibility of resolving some coeluted peaks in the one-dimension gas chromatography. Semiquantitative analysis of the samples verified that 59% of the area on the chromatogram of bio-oil is composed by phenols and 12% by aldehydes, mainly furfural. Using the same criterion, 77% of the organic compounds in the aqueous phase are phenols. Therefore, this preliminary assessment indicates that coconut fibers have the potential to be a cost-effective and promising alternative to obtain new products and minimize environmental impact.

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