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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 GC×GC/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 GC×GC/TOF-MS. The better performance of GC×GC/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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ResumoNeste trabalho analisou-se o bio-óleo produzido pela pirólise de caroços de pêssego usando 1D-GC/qMS (cromatografia gasosa monodimensional acoplada a espectrometria de massa quadrupolar) e GC×GC/ TOFMS (cromatografia gasosa bidimensional abrangente acoplada a espectrometria de massa por tempo de voo). Por 1D-GC/qMS foram identificados tentativamente 51 compostos e, por CG×GC/TOFMS, 207 compostos. As classes identificadas em ambas as técnicas foram alcoóis, aldeídos, anidridos, cetonas, ésteres, éteres e fenóis. Entretanto, as classes de ácidos carboxílicos, hidrocarbonetos e derivados de açúcar foram identificadas apenas na CG×GC/TOFMS, que se mostrou a técnica mais eficiente para esse tipo de análise. Os fenóis foram os compostos majoritários, tendo-se obtido uma distribuição estruturada no espaço bidimensional, o que facilitou a separação/identificação de pelo menos três subclasses de fenóis: alquil monofenóis, alquil metóxi fenóis e alquil benzenodióis. A caracterização mostrou que o bio-óleo pode ser uma fonte potencial de matéria-prima para a indústria química. Palavras-chaveCaroços de pêssego; pirólise; cromatografia gasosa monodimensional; cromatografia gasosa bidimensional abrangente.Caracterization of phenols in bio-oil from the pyrolysis of peach core by GC/MS e GC×GC/TOFMS AbstractIn this paper it was analyzed the bio-oil produced by pyrolysis of peach endocarp using 1D-GC/qMS (onedimensional gas chromatography coupled to mass spectrometry) and GC×GC/TOFMS (comprehensive two dimensional gas chromatography coupled to time of flight mass spectrometry). Were tentatively identified 51 compounds by 1D-GC/qMS and 207 compounds by GC×GC/TOFMS. The chemical classes identified in both techniques were alcohols, aldehydes, anhydrides, ketones, esters, ethers and phenols. However, the class of carboxylic acids, hydrocarbons and sugar derivatives were identified only