Application of polyacrylamide-based hydrogels for water removal from biodiesel in isothermal experiments

Autor(es)

Goncalves, Henrique Luiz ^[1] ; Fregolente, Patricia Bogalhos Lucente ^[2] ; Fregolente, Leonardo Vasconcelos ^[1] ; Soares, Joao P. B. ^[3]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Chem Engn Sch, BR-13081970 Campinas, SP - Brazil

^[2] Salesian Univ Ctr Sao Paulo, BR-13075490 Campinas, SP - Brazil

^[3] Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 1H9 - Canada

• Tipo de documento: Artigo Científico
• Fonte: FUEL; v. 306, DEC 15 2021.
• Citações Web of Science: 0

Resumo

Fuels with water contents higher than the limits specified by regulatory agencies may be subjected to high turbidity, microbial growth fouling, sludge formation, and promote the corrosion and failure of fuel injection components. In this investigation, polyacrylamide, poly(acrylamide-co-sodium acrylate) and poly(acrylamideco-acrylic acid) hydrogels were used to adsorb water from biodiesel in a batch system at 20 degrees C. The water content of biodiesel samples saturated with water could be lowered down to near 400 mg of water/kg of biodiesel under equilibrium conditions, a value comparable to other more mature technologies and in accordance with the EN 14214 standard. Among the three adsorption isotherm models fitted to the experimental data, the Freundlich model presented the best fit for polyacrylamide and poly(acrylamide-co-sodium acrylate) hydrogels, but all models failed for the poly(acrylamide-co-acrylic acid) hydrogel. The use of hydrogels for removal of water from fuels can be easily scaled up to a continuous process for commercial applications. (AU)

• Processo FAPESP: 15/20630-4 - Desenvolvimento integrado de biorrefinaria e planta de bioetanol de cana-de-açúcar com emissão zero de CO2: rotas para converter recursos renováveis em bioprodutos e bioeletricidade
• Beneficiário: Rubens Maciel Filho
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 17/12120-1 - Desenvolvimento de tecnologia para remoção de água de combustíveis líquidos utilizando hidrogéis
• Beneficiário: Leonardo Vasconcelos Fregolente
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Regular