A sustainable solar-driven electrochemical process for reforming lignocellulosic biomass effluent into high value-added products: green hydrogen, carboxylic and vanillic acids.

Autor: Campos da Paixão I; Renewable Energies and Environmental Sustainability Research Group, Institute of Chemistry, Federal University of Rio Grande do Norte, Campus Universitário Av. Salgado Filho 3000 Lagoa Nova CEP 59078-970 Natal Rio Grande do Norte Brazil carlosmh@quimica.ufrn.br elisama.vieira@ufrn.br., Cardozo JC; Renewable Energies and Environmental Sustainability Research Group, Institute of Chemistry, Federal University of Rio Grande do Norte, Campus Universitário Av. Salgado Filho 3000 Lagoa Nova CEP 59078-970 Natal Rio Grande do Norte Brazil carlosmh@quimica.ufrn.br elisama.vieira@ufrn.br., Sales Monteiro MK; Renewable Energies and Environmental Sustainability Research Group, Institute of Chemistry, Federal University of Rio Grande do Norte, Campus Universitário Av. Salgado Filho 3000 Lagoa Nova CEP 59078-970 Natal Rio Grande do Norte Brazil carlosmh@quimica.ufrn.br elisama.vieira@ufrn.br.; Human Resources Program of the National Agency for Petroleum, Natural Gas and Biofuels - PRH-26-ANP, Graduate Program in Chemical Engineering - PPGEQ Lagoa Nova Natal RN 59078-970 Brazil., Gondim AD; Renewable Energies and Environmental Sustainability Research Group, Institute of Chemistry, Federal University of Rio Grande do Norte, Campus Universitário Av. Salgado Filho 3000 Lagoa Nova CEP 59078-970 Natal Rio Grande do Norte Brazil carlosmh@quimica.ufrn.br elisama.vieira@ufrn.br., Cavalcanti LN; Renewable Energies and Environmental Sustainability Research Group, Institute of Chemistry, Federal University of Rio Grande do Norte, Campus Universitário Av. Salgado Filho 3000 Lagoa Nova CEP 59078-970 Natal Rio Grande do Norte Brazil carlosmh@quimica.ufrn.br elisama.vieira@ufrn.br., Fabiano de Santana Souza D; Chemical Engineering Department, Universidade Federal do Rio Grande do Norte Senador Salgado Filho Avenue S/N - Lagoa Nova Natal 59078-970 RN Brazil., Martínez-Huitle CA; Renewable Energies and Environmental Sustainability Research Group, Institute of Chemistry, Federal University of Rio Grande do Norte, Campus Universitário Av. Salgado Filho 3000 Lagoa Nova CEP 59078-970 Natal Rio Grande do Norte Brazil carlosmh@quimica.ufrn.br elisama.vieira@ufrn.br.; National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM), Institute of Chemistry, UNESP P.O. Box 355 14800 900 Araraquara SP Brazil., Vieira Dos Santos E; Renewable Energies and Environmental Sustainability Research Group, Institute of Chemistry, Federal University of Rio Grande do Norte, Campus Universitário Av. Salgado Filho 3000 Lagoa Nova CEP 59078-970 Natal Rio Grande do Norte Brazil carlosmh@quimica.ufrn.br elisama.vieira@ufrn.br.; National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM), Institute of Chemistry, UNESP P.O. Box 355 14800 900 Araraquara SP Brazil.
Jazyk: angličtina
Zdroj: RSC advances [RSC Adv] 2023 Dec 11; Vol. 13 (50), pp. 35755-35765. Date of Electronic Publication: 2023 Dec 11 (Print Publication: 2023).
DOI: 10.1039/d3ra05772k
Abstrakt: There is a growing concern with waste minimization and the promotion of the circular economy. Within this framework, using membrane-equipped electrochemical systems, the electrochemical oxidation (EO) of organic compounds and simultaneous hydrogen (H 2 ) production can considerably improve the sustainability and economic viability of this process. Here, we propose an innovative-integrate electrochemical treatment strategy to maximize the economic benefits and sustainability of selectively producing organic acids and energy-saving H 2 production from biomass platform compounds. The results clearly demonstrated that, on the one hand, more than 80 mg L -1 of oxalic acid was obtained in the anodic reservoir (using a boron-doped diamond electrode) with an alkaline medium (0.5 mol L -1 NaOH) by applying 100 mA cm -2 as well as vanillic acid production of 0.6795 mg L -1 under the same conditions. On the other hand, simultaneously green H 2 production greater than 2.6 L was produced, in the cathodic compartment with a Ni-Fe-based mesh as cathode, with a 90% faradaic efficiency during the process. Thus, the electrochemical conversion of lignocellulosic biomass effluent into high-value-added products and an energy vector was sustainably accomplished, suggesting that it is a promising energy-saving and cost-effective integrated approach for biomass valorization using solar energy.
Competing Interests: There are no conflicts of interest to declare.
(This journal is © The Royal Society of Chemistry.)
Databáze: MEDLINE
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