Estimate the osmotic pressure, Chemistry

Assignment Help:

A reverse osmosis membrane is used to desalinate high salinity groundwater. It is proposed to build an RO plant that will process about 500,000 liters/day of saline feed water containing sodium chloride at a concentration of about 5,000 mg/L having osmotic pressure of 3.57 atm. The permeability of the membrane selected for desalting the above water source is 3.2x10-8 m3 water/(m2 •s•atm)..

1. If 50% of the feed is recovered as desalted water at observed salt rejection of ~99%.

a. What is the required minimum feed pressure assuming that the entire membrane surface is to produce water permeate.

b. Estimate the expected salt concentration of the concentrate stream?

c. Estimate the osmotic pressure of the exit concentrate stream?

d. What is the required membrane surface area?

 2. If the concentration of the salt at the membrane surface, just at the exit end of the membrane channel, is a factor of 1.2 higher than the bulk concentration (assumed to be equal to the feed concentration), estimate the value of the mass transfer coefficient (in the appropriate units), assuming the same permeate flux as in part 91).


Related Discussions:- Estimate the osmotic pressure

Programming, how can one use programming in the the chemical field?

how can one use programming in the the chemical field?

Hybridization, Which of following carbon has sp3 hybriziation for bond form...

Which of following carbon has sp3 hybriziation for bond formation.??? Ch3,c2h6,(ch3)3cho

Hydrogen, what is water gas and how is it prepared?

what is water gas and how is it prepared?

Distillation, Ask question #Minimum 100oo words

Ask question #Minimum 100oo words

What is the structure of diborane, Q. What is the Structure of diborane? ...

Q. What is the Structure of diborane? The structure of diborane is of great interest since it cannot be explained on the basis of simple theories of bonding. As mentioned earli

Polonium 210, how did the british discover this isotope on different things...

how did the british discover this isotope on different things when they investigated the Litvenko murder

What is meant by integrated coastal zone management, Question : (i) Wh...

Question : (i) What is meant by Integrated Coastal Zone Management? (ii) What is its main objective? (iii) List the principal measures involved in the implementatio

Define measuring the equilibrium cell potential, Define Measuring the equil...

Define Measuring the equilibrium cell potential? Figure shows how we can use a potentiometer to determine the equilibrium cell potential. Consider Figure (a). Outside the galva

Catalysts, how a catalyst perform its work

how a catalyst perform its work

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