2026-05-31T23:19:46Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/404972026-02-03T11:06:16Zcom_10630_2254col_10630_37953

An integrated biorefinery approach based on spent coffee grounds valorization Pérez-Merchán, Antonio Manuel Moreno-Tost, Ramón Malpartida-García, Irene García-Sancho, Cristina Mérida-Robles, Josefa María Maireles-Torres, Pedro Jesús Química verde Desarrollo sostenible Refinerías Biomasa Café Spent coffee grounds (SCGs) are an abundant lignocellulosic biomass with significant potential for industrial valorization, with great social and environmental benefits, due to their rich composition in cellulose, hemicellulose and lignin. In this study, the organosolv process, a method widely used in the paper industry, was employed to efficiently fractionate SCGs into their primary components. Hemicellulosic liquors containing up to 25 wt% sugars, predominantly galactose and mannose, were successfully extracted and subsequently dehydrated to produce 5-hydroxymethylfurfural (5-HMF), reaching a maximum yield of 90 % within 15 min of reaction time. The residual cellulose and lignin fractions were characterized by X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy (FTIR), confirming their effective separation. These findings highlight the viability of SCGs as a sustainable feedstock for biorefinery applications, contributing to waste valorization and the development of a circular economy. 2025-10-29T11:25:12Z 2025-10-29T11:25:12Z 2025 journal article Pérez-Merchán AM, Moreno-Tost R, Malpartida-García I, García-Sancho C, Mérida-Robles JM, Maireles-Torres P. An integrated biorefinery approach based on spent coffee grounds valorization. Journal of Cleaner Production. 2025;528:146716. https://doi.org/10.1016/j.jclepro.2025.146716 https://hdl.handle.net/10630/40497 10.1016/j.jclepro.2025.146716 eng http://creativecommons.org/licenses/by/4.0/ open access Atribución 4.0 Internacional Elsevier