Home | My Profile | Contact Us
Research Trends Products  |   order gateway  |   author gateway  |   editor gateway  
Register | Forgot Password

Author Resources
 Author Gateway
 Article submission guidelines

Editor Resources
 Editor/Referee Gateway

 Regional Subscription Agents/Distributors
Trends in Chemical Engineering   Volumes    Volume 11 
Kinetic modeling of hydrogenation reactions over metal-supported catalysts, recognizing the differences between the molecular size of hydrogen and organic species: A brief review
María I. Cabrera, Ricardo J. Grau
Pages: 39 - 53
Number of pages: 15
Trends in Chemical Engineering
Volume 11 

Copyright © 2008 Research Trends. All rights reserved

This brief review focuses on the evolving concepts related to the kinetic modeling of catalytic hydrogenation systems involving organic compounds of large molecular size. After a short paragraph introducing the scope of the article, different mathematical approaches are reviewed from a Chemical Reaction Engineering viewpoint. Their chronological development is described, going from the early simple LHHW model to recent advanced models based on the concept of multicentered and semicompetitive adsorption. First, the review presents and critically analyzes the simplest mathematical attempts to deal with the classical kinetic models based upon extreme adsorption regimes, i.e., competitive and non-competitive adsorption between hydrogen and organic molecules. Then, it discusses progressive attempts based on more rigorous frameworks for conciliating the understanding of finite differences in the molecular size of species, admitting a distinction between occupied-sites and covered-sites by the large molecules of organic species. Accordingly, the concepts of multicentered and semi-competitive adsorption are brought on the scene, and recent proposals are analyzed in detail to link the two seemingly separate kinetic models describing the extreme modes of competitive and non-competitive adsorption. The additional indication of the number of surface sites that would likely be covered by organic molecules appears to be the most fascinating result of these advanced approaches. Finally, the review highlights the need for examining the robustness of these recent approaches.
Buy this Article


Buy this article
Buy this volume
Subscribe to this title
Shopping Cart

Quick Links
Search Products
Browse in Alphabetical Order : Journals
Browse by Subject Classification : Journals

Ordering Information Ordering Information
Downloadable forms Downloadable Forms