Chemical Engineering - Mass Transfer - Discussion
Discussion Forum : Mass Transfer - Section 1 (Q.No. 9)
9.
Fenske's equation for determining the minimum number of theoretical stages in distillation column holds good, when the
Discussion:
4 comments Page 1 of 1.
Kumar. said:
5 years ago
Tell me about multiple component distillation application & when it's required.
Roooo said:
10 years ago
Relative volatility is inversely to no.of stages.
Raj musale said:
1 decade ago
Fenske equation for minimum no of theoretical stages is:
Nm+1 = log(Xd(1-Xw)/Xw(1-Xd))/log (average relative volatility).
This equation suits best when relative volatility is constant; if relative volatility is not constant then avg relative volatility = (At Ab)^0.5.
Where At and Ab = Relative volatility of light key over heavy key at top and bottom of column respectively.
Nm+1 = log(Xd(1-Xw)/Xw(1-Xd))/log (average relative volatility).
This equation suits best when relative volatility is constant; if relative volatility is not constant then avg relative volatility = (At Ab)^0.5.
Where At and Ab = Relative volatility of light key over heavy key at top and bottom of column respectively.
(3)
Piyush donda said:
1 decade ago
If the relative volatility of the light key to the heavy key is constant from the column top to the column bottom, then \alpha_{avg.} is simply \alpha.
If the relative volatility is not constant from top to bottom of the column, and in equation we doing relative volatility is constant though out column.
If the relative volatility is not constant from top to bottom of the column, and in equation we doing relative volatility is constant though out column.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers