Green
coconut (Cocos nucifera L.
var. dwarf) is one of the most cultivated commodities on the Brazilian
coast. Most green coconut waste is burned or disposed of as garbage
on coconut-producing properties, on the streets of large cities, and
in landfills. Incorrect disposal of coconut waste causes several problems
as proliferation of disease vectors, occupation of large areas in
landfills, production of gases, and contamination of soil and groundwater.
The conversion of this biomass can be carried out through pyrolysis.
The bio-oil from the pyrolytic process has a complex chromatographic
profile requiring a fractionation step to improve its separation and
characterization. In this work, the bio-oil was fractionated according
to its acidity (strongly acidic, slightly acidic, basic, and neutral),
and both the bio-oil and the fractions were analyzed by fast-GC ×
GC/TOFMS. The fractionation process used was able to reduce the complexity
of the generated crude bio-oil. Three hundred and five different compounds
were identified between the fractions analyzed and the crude bio-oil.
The time for each analysis was 19 min, demonstrating the gain of the
separation/detection technique without losing quality in the identification.
The majority of the compounds in the fractions were phenol, catechols,
eugenols, and furfural, reinforcing the idea of using this bio-oil
as a precursor in the chemical industry.