Solketal Production from Glycerol Ketalization with Acetone: Catalyst Selection and Thermodynamic and Kinetic Reaction Study

• Tipo: Artigo em Revista Científica Internacional
• Data: 2019

Autores

Moreira, MN (Autor) Outra; Rui P.V. Faria (Autor) FEUP; Ana M. Ribeiro (Autor) FEUP; Rodrigues, AE (Autor) Outra

Revista

Título: Industrial & Engineering Chemistry Research

Vol. 58

ISSN: 0888-5885

Editora: American Chemical Society

Indexação

ISI Web of Knowledge - 0 Citações

Scopus - 13 Citações

Projetos Associados

LSRE-LCM - Laboratório de Processos de Separação e Reacção - Laboratório de Catálise e Materiais

SolkSCritSMBR - Produção sustentável de aditivos verdes para combustíveis assistida por dióxido de carbono supercrítico

Outras Informações

ID Authenticus: P-00R-4HW

DOI: 10.1021/acs.iecr.9b03725

Abstract (EN): In this work, the main results of a thermodynamic and kinetic study of glycerol ketalization to produce solketal in the presence of a solvent are presented. A catalyst and a solvent screening was carried out leading to the selection of Amberlyst-35 ion-exchange resin and ethanol as the most suitable materials for this reaction. A parametric study allowed one to determine reaction equilibrium and kinetic parameters in a batch reactor in the absence of external mass-transfer limitations. Regarding reaction thermodynamic equilibrium, a standard enthalpy of -20.1 +/- 1.1 kJ mol(-1) and a Gibbs free energy of 1.4 +/- 0.3 kJ mol(-1) were obtained. Reaction kinetics was studied assuming different reaction rate laws to fit the experimental data obtained: Pseudo-Homogeneous (PH), Langmuir-Hinshelwood-Hougen-Watson (LHHW), and Eley-Rideal (ER). The experimental results revealed that the reaction kinetics behavior could be accurately described by the LHHW reaction rate law, considering the presence of internal mass-transfer resistances. The activation energy for the overall reaction was found to be 69.0 +/- 6.6 kJ mol(-1).

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 14