Langmuir-Hinshelwood-Hougen-Watson kinetic reactors in Aspen Plus - PowerPoint PPT Presentation

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Langmuir-Hinshelwood-Hougen-Watson kinetic reactors in Aspen Plus

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    1. Langmuir-Hinshelwood-Hougen-Watson kinetic reactors in Aspen Plus Ch E 452 Lab David A. Rockstraw, Ph.D., P.E. New Mexico State University Chemical Engineering Department

    2. LHHW rate law form A LHHW rate law can typically be modeled using an isotherm that consists of 3 fundamental steps: adsorption of the reactants to the catalyst surface (a term proportional to the surface available for adsorption); surface reaction for reactants to form products (a term represented by a simple power law expression); and desorption of the products from the catalyst surface to the surrounding environment (a term proportional to the surface already adsorbed).

    3. LHHW Kinetics General form of LHHW kinetic rate law:

    4. LHHW Kinetics The driving force and adsorption terms are defined by equilibrium constants, Ki. Equilibrium constants must fit to the Aspen format as follows: Typical format Aspen Plus format