CHEN 3102 Lecture Notes - Lecture 42: Pfr, Volt, Limiting Reagent
28 Mar 2015
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Today: selectivity in reactors (part 1 today, part 2 monday) Hw # 7 posted due tuesday, 3 problems (turn into discussion) Consider multiple rxns in a reactor series: a --> b --> c. Selectivity is defined in many waysknow what eqn is used. Yield: refers to the amount of a specific product produced from the limiting reactant many ways to define it yield of component j (molar yield) ex: a is reacted in a flask w/ ca0 = 1. 0 m. After 1 hr, ca = 0. 3 m, cb = 0. 5 m, cc = 0. 2 m. A measure of the fraction of produced species that are a desired product. No bearing on reactant just tells you of the products that are made, how are they divided many definitions: molar selectivity in our old example: But usually don"t care about molesusually care about how feed stock turns into produts and byproducts: atomic selectivity (e. g. carbon-based)
