Synergistic Hydrothermal Conversion of Aqueous Solutions of CO 2 and Biomass Waste Liquefaction into Formate.

Autor: Andérez-Fernández M; Grupo de Tecnologías a Presión (PressTech), Instituto de Bioeconomía de la Universidad de Valladolid (BioEcoUVa), Departamento de Ingeniería Química y Tecnologías del Medio Ambiente, Escuela de Ingenierías Industriales, Universidad de Valladolid, 47011Valladolid, Spain., Pérez E; Departamento de Química Física, Facultad de Químicas, Universidad Complutense de Madrid. Avda Complutense s/n, 28040Madrid, Spain., Martín Á; Grupo de Tecnologías a Presión (PressTech), Instituto de Bioeconomía de la Universidad de Valladolid (BioEcoUVa), Departamento de Ingeniería Química y Tecnologías del Medio Ambiente, Escuela de Ingenierías Industriales, Universidad de Valladolid, 47011Valladolid, Spain., McGregor J; Department of Chemical and Biological Engineering, University of Sheffield, SheffieldS1 3JD, U.K., Bermejo MD; Grupo de Tecnologías a Presión (PressTech), Instituto de Bioeconomía de la Universidad de Valladolid (BioEcoUVa), Departamento de Ingeniería Química y Tecnologías del Medio Ambiente, Escuela de Ingenierías Industriales, Universidad de Valladolid, 47011Valladolid, Spain.
Jazyk: angličtina
Zdroj: ACS sustainable chemistry & engineering [ACS Sustain Chem Eng] 2022 Dec 19; Vol. 10 (50), pp. 16948-16957. Date of Electronic Publication: 2022 Dec 02.
DOI: 10.1021/acssuschemeng.2c06218
Abstrakt: CO 2 utilization by conversion into useful chemicals can contribute to facing the problem of increasing CO 2 emissions. Among other alternatives, hydrothermal transformation stands out by the high conversions achieved, just using high-temperature water as the solvent. Previous works have demonstrated that several organic compounds with hydroxyl groups derived from biomass can be used as reductants of NaHCO 3 aqueous solutions as inorganic CO 2 sources. Formate was obtained as the main product as it was produced by conversion both of the inorganic carbon and of the organic reductants, whose transformation into formate was promoted by the addition of NaHCO 3 . Based on these results, in this work, the hydrothermal conversion of NaHCO 3 is performed together with the liquefaction of lignocellulosic biomass (sugarcane bagasse and pine needles) in a one-pot process. Results show that yields to formate of 10% wt/wt (with respect to the initial concentration of biomass) are achieved by hydrothermal treatment of NaHCO 3 and lignocellulosic biomass at 250 °C with a residence time of 180 min. Other products, such as acetic acid and lactic acid, were also obtained. These results demonstrate the feasibility of the hydrothermal reduction of CO 2 combined with the hydrothermal liquefaction of residual biomass in a simultaneous process.
Competing Interests: The authors declare no competing financial interest.
(© 2022 The Authors. Published by American Chemical Society.)
Databáze: MEDLINE
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