Catalysis and Catalytic Reactors - Reactor Design Outline 1...

Info icon This preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
Reactor Design Catalysis and Catalytic Reactors Outline 1. Catalysts 2. Steps in a Catalytic Reaction Link to video lecture http://tegr.it/y/29vz
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Reactor Design Catalysis Catalysis is the change in rate of a chemical reaction due to the participation of a substance called a catalyst. A catalyst is not consumed by the reaction itself A catalyst may participate in multiple chemical transformations Catalysts that speed the reaction are called positive catalysts and that slow a reaction is called negative catalysts Though the catalysts speed up a reaction, it never determines the equilibrium or endpoint of a reaction. This is governed by thermodynamics alone According to transition theory, the catalysts reduces the potential energy barrier over which the reactants must pass to form products Examples: Ammonia synthesis Promoted iron SO 2 oxidation Venadium Pentaoxide Cracking Sylica, alumina Dehydrogenation Platinum, Molybdenum
Image of page 2
Reactor Design Action of catalysts: the reactant molecules are changed, energized or affected to form intermediates in the regions close to the catalyst surface The uncatalyzed reaction has to overcome a substantial energy barrier, whereas the barriers in the catalytic route are much lower. Catalysis
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon