Purge and recycle stream, Chemistry

Assignment Help:

The fresh feed to an ammonia production process contains nitrogen (N2) and hydrogen (H2) in stoichiometric proportion, along with an inert gas (I).   The feed is combined with a recycle stream containing the same three species, and the combined stream is fed to a reactor in which a low single pass conversion of nitrogen is achieved.  The reactor effluent flows to a condenser.  A liquid stream containing essentially all of the ammonia formed in the reactor and a gas stream containing all of the inerts and the unreacted nitrogen and hydrogen leave the condenser.  The gas stream is split into two fractions:  one is removed from the process as a purge stream, and the other is the recycle stream combined with the fresh feed. 

a.  Let xI0 be the mole fraction of inerts in the fresh feed, fsp the single pass conversion of nitrogen in the reactor and yp the fraction of the gas leaving the condenser that is purged (mol purged/ mol total). Taking a basis of 1 mol fresh feed, draw and fully label a process flowchart, incorporating xI0, fsp, and yp in the labeling.  Then, assuming that the values of these three variables are given, write a set of equations for the total moles fed to the reactor (nA), the moles of ammonia produced (np), and the overall nitrogen conversion (fov).  Each equation should involve only one unknown variable, which should be circled.

b.  Solve the equations of part a for xI0=0.01, fsp=0.20, yp=0.10. 

c.  Briefly explain in your own words the reasons for including (i) the recycle stream and (ii) the purge stream in the design process.


Related Discussions:- Purge and recycle stream

Lubrcants, Respected Mam/Sir Please tell me the detailed inforamtion about ...

Respected Mam/Sir Please tell me the detailed inforamtion about lubricant in metal rubbing

Explain about Froth flotation process , Q. Explain about Froth flotation pr...

Q. Explain about Froth flotation process? Froth flotation process is the most important method for beneficiation of ores. This process has made possible the beneficiation of lo

Blow moulding and thermoforming extensively, write on blow moulding and the...

write on blow moulding and thermoforming extensively. 3 pages

Hyperconjugation, can i know the applications or the effects of hyperconjug...

can i know the applications or the effects of hyperconjugation on carbenes and nitrenes

Transference numbers, a hittorf cell fitted with Ag-AgClis filled with HCl ...

a hittorf cell fitted with Ag-AgClis filled with HCl solution that contains 0.0003856g HCl/g water. A current of 2 mA is passed for exactly 3 hours. the solutions are withdrawn, we

WESTRON, explain industrial manufacturing process of westron and explain th...

explain industrial manufacturing process of westron and explain the advantages and disadvantages of westron

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd