Heterogeneous Adsorbate Based Kinetic Modeling

Wednesday, October 19, 2011: 9:10 AM
200 C (Minneapolis Convention Center)
Max Tirtowidjojo1, Christina Zarth2, Liping Zhang3, Debashis Chakraborty4 and Naoko Akiya4, (1)Hydrocarbons, Chemicals & Energy R&D, The Dow Chemical Company, Freeport, TX, (2)Chemicals R&d, The Dow Chemical Company, Zeven, Germany, (3)Chemicals R&D, The Dow Chemical Company, Freeport, TX, (4)Engineering & Process Science R&D, The Dow Chemical Company, Freeport, TX

The heterogeneous catalyzed partial oxidation reaction of hydrocarbons is a commercially important process.  Discovery of catalyst formulations and carriers have allowed economical processes with greater than 80% selectivity to the desired products and with a long catalyst lifetime.  Many hypotheses have been put forward regarding the kinetics and catalyst active site decay with run time for many partial oxidation processes.  In this work, the mechanistic heterogeneous kinetic modeling is considered using elementary reactions involving adsorbates and gas-phase species and intermediates.  The approach involves uses of reversible rate of reactions, molar balances of adsorbates, thermodynamic consistency of reaction kinetics involving adsorbates and gas-species, and the use of active site concentration.  A model for predicting catalyst lifetime performance will be discussed.

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See more of this Session: Catalyst Deactivation
See more of this Group/Topical: Catalysis and Reaction Engineering Division