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

Determing most ionic boonds, Normal 0 false false false ...

Normal 0 false false false EN-IN X-NONE X-NONE

Number of unpaired electrons in a chromic ion, The number of unpaired elect...

The number of unpaired electrons in a chromic ion Cr 3+ (atomic number = 24) is: (1) 6        (2) 4        (3) 3        (4) 1 Ans: 3

lewis acid and a lewis base, Draw out the Lewis structures of the followin...

Draw out the Lewis structures of the following two compounds.        BeCl 2 +  2Cl- → (a)  Determine which compound is the Lewis acid and which is the Lewis base.  What are the

Hard magnetic material is characterized, Hard magnetic material is characte...

Hard magnetic material is characterized by Hard magnetic material is characterized by two substance:- a) High residual magnetic induction.. b) High coercive force

Determine the wavelength of the light, If change in energy (ΔE) = 3x 10 -8...

If change in energy (ΔE) = 3x 10 -8 j, h= 6.64x 10 -34 j-s  and c= 3x 10 8 m/s  then wavelength of the light is: (1) 6.36x 10 3 Å                 (2) 6.36x 10 5 Å

Simple distillation - purification of organic compounds, Simple Distillatio...

Simple Distillation - Purification of organic compounds Distillation is the joint procedure of vapourisation and condensation. This method is employed for the purification o

Mole concept, What wieght of CO is required to form re2(CO)10 from 2.5 gm o...

What wieght of CO is required to form re2(CO)10 from 2.5 gm of re2(O)7

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