Sugars and char formation on subcritical water hydrolysis of sugarcane straw

Autor(es)

Lachos-Perez, D. ; Tompsett, G. A. ; Guerra, P. ; Timko, M. T. ; Rostagno, M. A. ; Martinez, Julian ; Forster-Carneiro, T.

• Tipo de documento: Artigo Científico
• Fonte: Bioresource Technology; v. 243, p. 1069-1077, NOV 2017.
• Citações Web of Science: 13

Resumo

Subcritical water has potential as an environmentally friendly solvent for applications including hydrolysis, liquefaction, extraction, and carbonization. Here, we report hydrolysis of sugarcane straw, an abundant byproduct of sugar production, in a semi-continuous reactor at reaction temperatures ranging from 190 to 260 degrees C and at operating pressures of 9 and 16 MPa. The target hydrolysis products were total reducing sugars. The main products of sugarcane straw hydrolysis were glucose, xylose, arabinose, and galactose in addition to 5-hydroxymethylfurfural and furfural as minor byproducts. Fourier transform infrared spectroscopy and thermogravimetric analysis provided additional information on the surface and bulk composition of the residual biomass. Char was present on samples treated at temperatures equal to and greater than 190 degrees C. Samples treated at 260 degrees C contained approximately 20 wt% char, yet retained substantial hemicellulose and cellulose content. Hydrolysis temperature of 200 degrees C provided the greatest TRS yield while minimizing char formation. (C) 2017 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 15/11932-7 - Integração de processos de extração a alta pressão com operações de separação para o aproveitamento de subprodutos do processamento de frutas
• Beneficiário: Julian Martínez
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/04304-4 - Desenvolvimento de sistemas integrados para a análise de compostos bioativos em produtos naturais utilizando tecnologia supercrítica
• Beneficiário: Maurício Ariel Rostagno
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 11/19817-1 - Biorefinaria na indústria agroalimentar: reaproveitamento de resíduos para produção de novos compostos químicos e biohidrogênio
• Beneficiário: Tânia Forster Carneiro
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Jovens Pesquisadores