Kinetics of propylene hydrogenation on nanostructured palladium clusters

• Tipo: Artigo em Revista Científica Internacional
• Data: 2004

Autores

Lúcia Brandão (Autor) Outra; Detlev Fritsch (Autor) Outra; Luís Madeira (Autor) FEUP; Adélio Mendes (Autor) FEUP

Revista

Título: Chemical Engineering Journal

Vol. 103 Nº 1

Páginas: 89-97

ISSN: 1385-8947

Editora: Elsevier

Indexação

ISI Web of Knowledge - 14 Citações

ISI Web of Science

Scopus - 14 Citações

COMPENDEX

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia química

CORDIS: Ciências Tecnológicas > Tecnologia > Tecnologia química

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9