Kinetic study for the direct synthesis of dimethyl carbonate from methanol and CO2 over CeO2 at high pressure conditions

• Tipo: Artigo em Revista Científica Internacional
• Data: 2013

Autores

Bruno Santos (Autor) FEUP; Carla Pereira (Autor) FEUP; Viviana Silva (Autor) FEUP; José M. Loureiro (Autor) FEUP; Alírio E. Rodrigues (Autor) FEUP

Revista

Título: Applied Catalysis A: General

Vol. 455

Páginas: 219-226

ISSN: 0926-860X

Editora: Elsevier

Indexação

ISI Proceedings

ISI Web of Knowledge - 14 Citações

ISI Web of Science

Scopus - 10 Citações

INSPEC

SIIC Data Bases

COMPENDEX

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia química

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia química

Outras Informações

ID Authenticus: P-005-2DQ

DOI: 10.1016/j.apcata.2013.02.003

Abstract (EN): The kinetics for the direct synthesis of dimethyl carbonate was studied over CeO2 at high pressure conditions in a batch reactor. Langmuir-Hinshelwood and Eley-Rideal mechanisms were proposed and compared by the performance of the respective reaction rate expression in fitting to the experimental kinetic data. The reactions were held at different temperatures (378-408 K), CO2/methanol molar ratios (1.1-4.0) and pressures (15-20 MPa) in order to adjust the kinetic parameters. An activation energy of 106 kJ mol(-1), as well as the standard enthalpy and Gibbs energy of reaction (-20.10 and 31.50 kJ mol(-1)) were calculated from experiments. Furthermore, the changes in pressure revealed an effect on the kinetic constant, with an activation volume equal to -0.208 cm(3) mol(-1).

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8