The Legal Amazon is home to vast biodiversity and, thus, specific and differentiated
agroforestry resources on the part of the plant production chain that support traditional
communities through diversified and commercial activities. Among these resources, such
as lignocellulosic biomasses, which, after processing, are large in proportion of waste.
From this information, due to their physicochemical characteristics, it is possible to obtain
several compounds of high added value with applicability within the context of
biorefineries. The residues of green coconut, babassu and Brazil nut in the husk fraction
were studied. These residues were subjected to techniques such as immediate chemical
analysis (moisture content, ash, volatile matter, and fixed carbon), Soxhlet extraction,
acid hydrolysis, UV spectroscopy, x-ray diffraction, pyrolysis, Brunauer-Emmett-Teller
analysis. (BET), analysis by Gas Chromatography Mass Spectrometry (GC‑MS) and
calculations to estimate the economic and energy potential seeking to produce compounds
such as sugars, bio-oil, biochar, and other value-added bioproducts were studied. The
contents of total reducing sugars and lignin were higher than 28% and 30%, respectively.
The cellulose crystallinity varied between 25 and 40%, with higher values for babassu,
which also presented higher values of glucose and total sugar. The yields found for the
biochar and the bio-oil from the green coconut husks were 31% and 30%, respectively.
The main components found in bio-oil were furfural (29.23%), phenol (22.18%) and
isoeugenol (10.26%), compounds that can be used in the production of fine chemical and
plastics, agrochemicals, biomaterials, in the pharmaceutical and food industry. The
biochar presented surface area values (BET and Langmuir) greater than 300 m2g-1 and a
micropore volume of 0.11 cm3g-1, which can be used as a satisfactory adsorbent. The
estimated theoretical energy potential of biochar and bio-oil were 208,107,180 MJ and
190,205,438 MJ, equivalent to 3,729,518.4 tons of coconut husks, that would be enough
to supply the energy consumption of 5,734,747 Brazilian homes in a period of 12 months.
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