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Pyrolysis of Banana and Coffee Residues after Acid Hydrolysis



Author(s)

Magale Karine Diel Rambo, Etelvino Henrique Novotny, Luciano Pasqualoto Canellas, Natália de Oliveira Aguiar, Rubens Auccaise4 and Michele Cristiane Diel Rambo

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DOI:10.17265/1934-7375/2014.10.005

The use of the residues from renewable feedstock, besides the production of fuels, but also for the generation of other chemicals products, has become a priority. Superior plants have considerable potential as carbohydrate, aryl and fatty acids sources. However, the separation of the main constituents of the samples is necessary for several purposes in the biorefinery concept. The acid hydrolysis and pyrolysis processes are very promising technology, however, some adjustments in the conditions of pyrolysis are needed for different biomasses since carbohydrates were detected (14%-17%) in the residues after the conventional acid hydrolysis of these uncommon biomasses (coffee husk and banana stem and stalk). On the other hand, it was showed that, by pyrolysis, it is possible to obtain from the solid residue after acid hydrolysis: pyrogenic carbon (charcoal with a yield of 48.5%-52.7%) for agriculture use (biochar) and valuable chemicals in the pyrolysis oil biooil fraction (that accounted by 26.4%-29.0%, free of water), such as lignin monomers (32.6%-56.4% of the bio-oil) and fatty acids (30%-52.5%).

 Lignocellulosic biomass, biorefinery, acid hydrolysis, analytical pyrolysis, ¹³C NMR (nuclear magnetic resonance)