5) The following example illustrates an ammonia synthesis process in which an inert gas (I) is...

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Chemistry

5) The following example illustrates an ammonia synthesisprocess in which an inert gas (I) is present, necessitating a purgestream. The fresh feed to the process contains nitrogen andhydrogen, as well as an inert gas (I). The feed is combined with arecycle stream containing the same three species, and the combinedstream is fed to a reactor. The reactor effluent flows to acondenser. A liquid stream containing all of the ammonia formed inthe reactor and a gas stream containing all the inerts and theunreacted nitrogen and hydrogen leave the condenser. The gas streamis split into two fractions with the same composition: one isremoved from the process as a purge stream, and the other is therecycle stream, which is subsequently combined with the fresh feed.In every stream containing nitrogen and hydrogen, the two speciesare in stoichiometric proportion. Let yI0 be the mole fraction ofinerts in the fresh feed, f the single-pass conversion of nitrogenin the reactor, and p the fraction of the gas leaving the condenserthat is purged (mol purged/mol total). Draw and fully label aprocess flowchart, and using stoichiometric ratios, physicalconstraints and simple material balances in your head, try tointroduce the fewest possible variables. In other words express asmany quantities as possible in terms of yI0, f and p. Given yI0 =0.01, f = 0.20, and p = 0.10, chose a basis anywhere in the problemand solve for the total moles fed to the reactor (nr), moles ofammonia produced (np), and overall nitrogen conversion (fov).

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Let F Moles of fresh feed of N2 and H2 and R moles of Recyclecontaining N2 and H2Mole fraction of feed of N2 and H2 1y10 1Total flow of N2 H2 and I F1y10 2Moles of inerts in the feed Fy101y10 3Moles of N2 and H2 entering the reactor FR 4The reaction is N23H22NH3 5Percent    See Answer
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