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

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Reactor Design Catalysis and Catalytic Reactors Outline 1. Catalysts 2. Steps in a Catalytic Reaction Link to video lecture
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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
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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
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