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

• Type: Article in International Scientific Journal
• Date: 2013

Authors

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

Journal

Title: Applied Catalysis A: General

Vol. 455

Pages: 219-226

ISSN: 0926-860X

Publisher: Elsevier

Indexing

ISI Proceedings

ISI Web of Knowledge - 14 Citations

ISI Web of Science

Scopus - 10 Citations

INSPEC

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COMPENDEX

Scientific classification

FOS: Engineering and technology > Chemical engineering

CORDIS: Technological sciences > Engineering > Chemical engineering

Other information

Authenticus ID: 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).

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8