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Lignocellulosic Residues from the Brazilian Juice Processing Industry as Novel Sustainable Sources for Bioenergy Production: Preliminary Assessment Using Physicochemical Characteristics

2020; Brazilian Chemical Society; Linguagem: Inglês

10.21577/0103-5053.20200094

1678-4790

José Luiz Francisco Alves, Emmely Trindade, Jean Constantino Gomes da Silva, Guilherme Davi Mumbach, Ricardo Francisco Alves, José Maria Barbosa‐Filho, Petrônio de Athayde‐Filho, Rennio de Sena,

Biofuel production and bioconversion

This work aims to investigate the energy-related characteristics of apple bagasse, orange bagasse and cashew-apple bagasse to identify their potential as bioenergy feedstocks.For this, a detailed characterization was performed, including proximate analysis, ultimate analysis, atomic molar ratio, heating values, chemical composition, bulk density, bioenergy density, fuel-value-index (FVI), fossil fuel equivalence and potential CO 2 retention.Proximate composition revealed moisture, volatile matter, fixed carbon and ash contents in the range of 7.8-9.3%,67.1-74.2%,16.2-22.0%and 1.6-5.7%,respectively.Typical values for carbon (44.8-49.9wt.%), hydrogen (5.5-6.6 wt.%) and oxygen (40.1-44.2wt.%), with low sulfur (< 0.1 wt.%) and nitrogen (< 2.7 wt.%) contents were found.In regard to bulk density (237.7-554kg m -3 ) and bioenergy density (3.93-10.1 GJ m -3 ), juice processing residues have substantial values when compared with well-known lignocellulosic residues.Recoverable energy potential from the juice processing residues varied from 15.24 to 17.03 MJ kg -1 .From FVI analysis, apple bagasse is expected to be more suitable for thermochemical processing.Orange bagasse, on the other hand, has the highest equivalent in fossil fuel volume.Consequently, its use as solid fuel may lead to a decrease in CO 2 emissions from reference fuels.