“Performance and kinetic modeling of Purolite C160 solid acid resin in the esterification of glycerol with acetic acid” / “Desempenho e modelo cinético da resina sólida ácida Purolite C160 na esterificação de glicerol com ácido acético”

• Autor(a) principal: Dalibera, Natália Cristina
• Data de Publicação: 2021
• Outros Autores: Barbosa, Vitor Pereira, Ungar, Guilherme Carmelo, Manhani, Kelly Cristina, Meneguetti, Giovanna Pastore, Paiva, Lucilene Betega de, Derenzo, Silas
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Revista Veras
• Texto Completo: https://ojs.brazilianjournals.com.br/ojs/index.php/BRJD/article/view/32803
• topic: Purolite C160; diacetin; heterogeneous catalysis; esterification; kinetics

The present study analyzes the performance of Purolite C160 as heterogeneous catalyst for the esterification reaction of glycerol with acetic acid to produce diacetin. The reactions were conducted in 220ml batches, varying the acetic acid/glycerol molar ratio (?) in 4, 5 and 6, with a catalyst/glycerol mass ratio of 23% at 90°C, 100°C and 110°C. The best result was obtained at 110oC with ? of 6, with 95% conversion of glycerol and selectivity of monoacetin, diacetin and triacetin of 26%, 60% and 14%, respectively, after 150 minutes. A kinetic model was presented, and the reaction constants (ki) and the activation energies were obtained using interior point algorithm in software MATLAB. Different expressions of ki as a function of temperature were obtained for different values of ?.