A novel ‘sea-thermal’, synergistic co-valorisation approach for biofuels production from unavoidable food waste (almond hulls) and plastic residues (disposable face masks)

Autor: Javier Remón, Gonzalo Zapata, Luis Oriol, José Luis Pinilla, Isabel Suelves
Přispěvatelé: European Commission, Agencia Estatal de Investigación (España), Ministerio de Ciencia, Innovación y Universidades (España), Remón, Javier, Pinilla Ibarz, José Luis, Suelves Laiglesia, Isabel, Remón, Javier [0000-0003-3315-5933], Pinilla Ibarz, José Luis [0000-0002-8304-9656], Suelves Laiglesia, Isabel [0000-0001-8437-2204]
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Zaguán. Repositorio Digital de la Universidad de Zaragoza
instname
Digital.CSIC. Repositorio Institucional del CSIC
Popis: 6 figures, 5 tables.-- Supplementary information available.
This work first-time addresses the synergetic hydrothermal co-valorisation of almond hulls (an unavoidable food waste) and FFP2 face masks (a common plastic material) using seawater (a sustainable reaction medium). The effects of the feedstock composition (each material alone and all possible binary combinations) and the reaction medium (deionised water, seawater and all possible binary mixtures) have been evaluated at 350 °C and 170 bar over a wide range of reaction times (20–180 min). Bilateral biomass-plastic synergistic and antagonistic interactions between both feedstocks, combined with several promoting and inhibiting effects displayed by seawater, ruled the distribution of the reaction products and their most important physicochemical and fuel properties. Process optimisation revealed that the formation of an energy-dense (32 MJ/kg) liquid biofuel was maximised (26% biocrude yield) by conducting the process with almond hulls in deionised water for 115 min. At the same time, face masks promoted solid biofuel formation (83% hydrochar yield, 46 MJ/kg) by coprocessing an almond hulls/disposable face masks mixture (8:92 wt%) in salted (seawater/deionised water mixture with 37471 ppm salinity) water for 180 min. Conducting the process with seawater (44608 ppm salinity) for 180 min allowed coprocessing of both materials (22/78 wt% almond hulls/face masks) efficiently to maximise biofuels production (13% biocrude yield, HHV = 33 MJ/kg and 67% hydrochar yield, HHV = 49 MJ/kg). These results are a breakthrough in developing season-free and flexible biorefineries, which contribute to reducing pollution and bringing out the hidden value of human activity common residues.
This work was funded by FEDER and the Spanish Ministry of Science, Innovation and Universities (ENE 2017-83854-R) and MCIN/AEI/10.13039/501100011033 (I+D+i project PID2020-115053RB-I00). Javier Remón is grateful to the Spanish Ministry of Science, Innovation and Universities for the Juan de la Cierva (JdC) fellowship (IJC2018-037110-I) awarded.
Databáze: OpenAIRE
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