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Using the reaction chemistry and kinetics presented in Example 4.7, change the feed concentration of NO from 5% to 5 ppm, and examine the effect on the concentration profile for ethane in the PFR at 1050 K. Assume the feed consists only of ethane and NO, and that the pressure and volumetric flow rate are the same as in example 4.7. Explain the effect of the feed NO concentration on the ethane conversion.

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Example 4.7: Ethane pyrolysis in the presence of NO The thermal decomposition of ethane is inhibited by nitric oxide. Laidler and Wojciechowski [10] have suggested the following sequence of elementary reactions to describe pyrolysis. C2H6+NOk1C2H5+HNOC2H5k2H+C2H4H+C2H6K3C2H5+H2H+NOk4HNOHNOkH+NOC2H5+HNOk6C2H6+NO The kinetic data for this reaction are, where ki=Aiexp(Ei/RT) Assume the reaction takes place in an isothermal, 1500cm3 PFR Operating at constant pressure (1.0atm). The feed to the reactor consists of a mixture of ethane and NO with a molar ratio of 95% ethane and 5% NO. The inlet volumetric flowrate is 600cm3/s. Consider a base-case reactor temperature of 1050K