Kinetics of propylene hydrogenation on nanostructured palladium clusters

• Type: Article in International Scientific Journal
• Date: 2004

Authors

Lúcia Brandão (Author) Other; Detlev Fritsch (Author) Other; Luís Madeira (Author) FEUP; Adélio Mendes (Author) FEUP

Journal

Title: Chemical Engineering Journal

Vol. 103 No. 1

Pages: 89-97

ISSN: 1385-8947

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 14 Citations

ISI Web of Science

Scopus - 14 Citations

COMPENDEX

Scientific classification

FOS: Engineering and technology > Chemical engineering

CORDIS: Technological sciences > Technology > Chemical technology

Other information

Authenticus ID: P-000-83E

DOI: 10.1016/j.cej.2004.07.008

Abstract (EN): Surfactant-stabilised palladium nanoclusters with an average diameter of about 7.3 nm (determined by XRD) are used as catalysts in propylene hydrogenation. Experiments performed in an isothermal batch reactor (T = 308 K), with total pressures in the range 0.25-9.0 bar and with initial hydrogen molar ratios varying between 0.05 and 0.40, provide a further insight on the reaction kinetics. It is shown that a Langmuir-Hinshelwood rate equation well represents the reaction data, which mechanism involves competitive adsorption of the reagents, with dissociation of hydrogen on the catalyst surface, and where surface reaction is the limiting step. Nonlinear optimization of the initial rate data provided the kinetic parameters of the rate law (k = 5.569 mol g(Pd)(-1) s(-1); K-H2 = 3.799 x 10(-2) bar(-1) and K-C3H6 = 0.996 bar(-1)), which is validated by integration of the mass balance in the batch reactor.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9