High-pressure fractionation of spent coffee grounds oil using green solvents

Autor(es)

Bitencourt, Raphaela G. ^[1] ; Mello, Fernando M. P. A. ^[1] ; Cabral, Fernando A. ^[1] ; Meirelles, Antonio J. A. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Sch Food Engn, Lab Extract Appl Thermodynam & Equilibrium ExTrAE, UNICAMP, BR-13083862 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF SUPERCRITICAL FLUIDS; v. 157, MAR 1 2020.
• Citações Web of Science: 1

Resumo

Coffee industry generates large amounts of organic waste, including residues obtained during instant coffee production, referred to as spent coffee grounds (SCG). In this work, methods for extraction and fractionation of oil from SCG, focusing on the phenolic compounds content (TPC), were investigated at 333 K and 40 MPa, in one or two steps, with different solvents: pure supercritical CO2 (scCO(2)), ethanol and supercritical mixture of CO2 with ethanol (90:10 w/w). Fractionation was also evaluated in four separators aligned in series at 323 K at different pressures and ethanol concentrations. The ethanolic extract (E) presented the highest overall yield (25 wt%). Samples from the first separator obtained during fractionation of ethanolic extract showed TPC values up to four times higher than the original extract. Similar TPC enrichment was observed via two-step extraction. The results indicated the methods proposed are efficient to obtain extracts from SCG with higher content of phenolics. (C) 2019 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 16/09931-5 - Extração e fracionamento de óleo e compostos fenólicos de borra de café utilizando tecnologia supercrítica
• Beneficiário: Fernando Morais Peliello de Anhaia Mello
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 14/21252-0 - Equilíbrio e processos de produção de biocombustíveis e bioprodutos
• Beneficiário: Antonio José de Almeida Meirelles
• Modalidade de apoio: Auxílio à Pesquisa - Temático