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

Iupac.., 100 ch3-ch2-choh-ch2-ch2cl

100 ch3-ch2-choh-ch2-ch2cl

Chemistry - titrations and ph, 1) A 100 mL 0.4M acetic acid soln is titrate...

1) A 100 mL 0.4M acetic acid soln is titrated with 0.5M NaOH. Write a reaction equation to work the following: a) What volume of the base would be required to reach the equivalenc

What are factorial experiment studies, Q. What are factorial experiment stu...

Q. What are factorial experiment studies? Factorial experiment studies determine the effect of some independent variables on food quality indices through varying two or more in

Technique error affect the reported activation energy, 1. The temperature o...

1. The temperature of the warm water bath is recorded too high. How will this technique error affect the reported activation energy for the reaction - too high or too low? explain

Determine electrons in carbon atom, The number of unpaired electrons in ca...

The number of unpaired electrons in carbon atom in excited state is: (1) One  (2) Two          (3) Three      (4) Four Ans: Four

Lanthinides, how can you explain the fact that lanthinides are highly elect...

how can you explain the fact that lanthinides are highly electopositive?

Basic radicals, Why lead and mercury are in 1st and 2nd group of basic radi...

Why lead and mercury are in 1st and 2nd group of basic radicals

What are the favorable conditions for formation of anions?, There are two c...

There are two conditionfor foramtion of anions a)  High Electron affinity b) Small size Less charge of an atoms form anion more simply

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