Tungsten oxide supported on copper ferrite : a novel magnetic acid heterogeneous catalyst for biodiesel production from low quality feedstock

• Autor(a) principal: Santos, Hiarla Cristina Lima dos
• Data de Publicação: 2022
• Outros Autores: Gonçalves, Matheus Arrais, Viegas, Alexandre da Cas, Figueira, Bruno Apolo Miranda, Luz, Patrícia Teresa Souza da, Rocha Filho, Geraldo Narciso da, Conceiçao, Leyvison Rafael Vieira da
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFRGS
• Texto Completo: http://hdl.handle.net/10183/257915
• topic: Catalisadores; Biodiesel; Óxido de tungstênio; Transesterificação; Ferritas

This study aims to synthesize a WO3/CuFe2O4 catalyst through a wet impregnation method and use it as a new magnetic acid catalyst in the transesterification process of waste cooking oil (WCO). The results of the characterization by XRD, FTIR, SEM, EDS, TG/DTG, VSM and Surface Acidity showed that the obtained bifunctional catalyst has been successfully synthesized. The study of the reaction parameters, such as reaction temperature (140–180 °C), reaction time (1–5 h), molar ratio MeOH : oil (25 : 1–45 : 1) and catalyst loading (2–10% m m−1 ) was performed in the conversion of WCO into biodiesel via transesterification. The reactional behavior showed the following optimal reaction conditions: reaction temperature of 180 °C, reaction time of 3 h, molar ratio MeOH : oil of 45 : 1 and catalyst loading of 6%. Based on the results, biodiesel with a maximum ester content of 95.2% was obtained using the WO3/ CuFe2O4 magnetic catalyst under the optimal reaction conditions. The magnetic catalyst showed excellent catalytic and magnetic performance and it was applied in five reaction cycles with ester content above 80%. Biodiesel properties were found in accordance with ASTM limits. This research provided the development of a stable and reusable WO3/CuFe2O4 bifunctional catalyst for potential application in biodiesel production.