Propyne hydrogenation kinetics over surfactant-stabilized palladium nanoclusters

• Type: Article in International Scientific Journal
• Date: 2007

Authors

Lúcia Brandão (Author) FEUP; Fritsch, D (Author) Other; Adélio Mendes (Author) FEUP; Luis Madeira (Author) FEUP

Journal

Title: Industrial & Engineering Chemistry Research

Vol. 46 No. 16

Pages: 377-384

ISSN: 0888-5885

Publisher: American Chemical Society

Indexing

ISI Web of Knowledge - 9 Citations

ISI Web of Science

Scopus - 8 Citations

Scientific classification

FOS: Engineering and technology

CORDIS: Technological sciences > Engineering > Chemical engineering

Other information

Authenticus ID: P-004-C7R

DOI: 10.1021/ie0602761

Abstract (EN): The kinetics of propyne hydrogenation over surfactant-stabilized palladium nanoclusters was studied in a batch reactor under isothermal conditions (308 K). The method of initial rates was adopted to elucidate the reaction mechanism and a rate equation was derived. Although the methodology employed does not exclude other reaction schemes, it was found that experimental rate data agree well with a Langmuir-Hinshelwood mechanism that involves noncompetitive adsorption between propyne and hydrogen for the catalyst surface, where hydrogen addition in the surface reaction(s) is the limiting step. Nonlinear model fitting to initial rate data provided the kinetic parameters of the rate equation (k (mol center dot g(Pd)(-1)center dot s(-1)center dot bar(-2)) = 4.1; K-C3H4 (bar(-1)) = 8.7 x 10(2); and K-H2 (bar(-1)) = 1.0 x 10(-5)). Finally, experimental compositions of the reaction mixture over time, as well as the overall advancement history, were compared favorably with the kinetic model through integration of the mass balance in the batch reactor.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8