A sample of waste gas which contains 30mol% acetone is to be scrubbed in a plate column using a non-volatile absorption oil. If the oil, free acetone, enters from the top of the column while the waste gas flows counter-currently from the bottom of the tower. Calculate the number of moles of the oil necessary to remove 90% of the acetone in the waste gas. The concentration of the acetone in the exit oil liquor is not to exit 10mol%. Through a proper material balances within the system, develop a the operating line equation in terms of the vapour and liquid mole fractions, Yn+1 and X, and use the equation to determine and tabulate the values of Yn+1 for X, = 0 025, 0.050, 0.075 and 0.100. Sketch and label the column. 1.
A sample of waste gas which contains 30mol% acetone is to be scrubbed in a plate column using a non-volatile absorption oil. If the oil, free acetone, enters from the top of the column while the waste gas flows counter-currently from the bottom of the tower. Calculate the number of moles of the oil necessary to remove 90% of the acetone in the waste gas. The concentration of the acetone in the exit oil liquor is not to exit 10mol%. Through a proper material balances within the system, develop a the operating line equation in terms of the vapour and liquid mole fractions, Yn+1 and X, and use the equation to determine and tabulate the values of Yn+1 for X, = 0 025, 0.050, 0.075 and 0.100. Sketch and label the column. 1.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:A sample of waste gas which contains 30mol% acetone is to be scrubbed in a plate column using
a non-volatile absorption oil. If the oil, free acetone, enters from the top of the column while the
waste gas flows counter-currently from the bottom of the tower. Calculate the number of moles of the
oil necessary to remove 90% of the acetone in the waste gas. The concentration of the acetone in the
exit oil liquor is not to exit 1Omol%. Through a proper material balances within the system, develop a
the operating line equation in terms of the vapour and liquid mole fractions, Yn+1 and Xn, and use the
equation to determine and tabulate the values of Yr+1 for X, = 0 025, 0.050, 0.075 and 0.100. Sketch
and label the column.
1.
Transcribed Image Text:2 (a) A single effect evaporator, operating at latm pressure concentrates 3kgs of 25% by weight
LiCl solution 42%.. The feed which enters at 25°C has a heat of solution - of 30.5kJ/mol. of LiCI,
while the 4 (a) With a simplified and well labeled diagram, briefly describe the key features and the
operations of a double-effect evaporator.(b) An evaporator is fed continuously with 23,000kg/hr of a
solution containing 20% NAOH, 15% NaCl, by weight in an aqueous solution. During evaporation
process, there is simultaneous crystallization and removal of the salt from the liquor. The
concentrated liquor leaving the evaporator contains 50% NaOH, 2.0% NaCl in the solution. By
appropriate material balances on the system, calculate the masses of each component in the inflow
and outflow of solution. What are the rates of the water evaporated, the salt crystallized and liquor
production?
-1
000ar stating the agents of separation and
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