Integrated renewable H2 production and industrial wastewater treatment using a semi-pilot scale flow electrolyzer

Autor(es)

Sgarbi, Ricardo ; Mandelli, Cecilia M. ; Ruotolo, Luis A. M.

• Tipo de documento: Artigo Científico
• Fonte: CHEMICAL ENGINEERING JOURNAL; v. 507, p. 12-pg., 2025-03-01.

Resumo

Integration of mandatory wastewater treatment with renewable H2 production has been explored as a costreduction strategy, by trading the generated H2 as feedstock to relevant industries. A semi-pilot scale flow electrolyzer, innovatively designed for this purpose, demonstrated promising performance. Both the cathodic hydrogen evolution reaction and the anodic organic electrooxidation were investigated under two sets of operational conditions: (i) temperature, current density, and conductivity, and (ii) membrane type, and catholyte concentration. Thereupon, it is observed that a highly conductive, alkalinized catholyte, in combination with a low-cost anion exchange membrane, enhances both reactions by amplifying conductivity, promoting OH- ion transport, and accelerating anode kinetics. Furthermore, the electrolyzer successfully treated industrial wastewater while simultaneously producing renewable H2 with low CO2 emissions: 2.0 kgCO2 kgH2 cost was mainly influenced by electricity prices, ranging from 2.7 to 15.7 US$ kgH2 (AU)

• Processo FAPESP: 23/06600-1 - Produção de hidrogênio verde a partir do tratamento eletroquímico de efluentes industriais
• Beneficiário: Luis Augusto Martins Ruotolo
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 24/11001-2 - Desenvolvimento de reator eletroquímico com eletrodos tridimensionais para a remoção de compostos orgânicos poluentes por eletrocoagulação e eletrodegradação
• Beneficiário: Ricardo Sgarbi de Moraes
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 22/12895-1 - Processos avançados para a degradação de poluentes emergentes: materiais catalíticos, sensores eletroanalíticos e divulgação científica
• Beneficiário: Marcos Roberto de Vasconcelos Lanza
• Modalidade de apoio: Auxílio à Pesquisa - Temático