gas-liquid separator

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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A gas stream consists of 35 mol % 1-butanol, 25 mol % methanol and the balanced nitrogen
is fed to a gas-liquid separator with flowrate of 100 mol/min. Objective of the separator is to
condense the 1-butanol and methanol. In the separator, the gas mixture is in equilibrium with
its liquid at dew point temperature (Top) of 80 °C and pressure of 4600 mmHg. The liquid
mixture consisting of 63 mol % 1-butanol and the balanced methanol leaves the separator as
liquid outlet stream. On the other hand, the gas mixture consists of 1-butanol, methanol and
non-condensable nitrogen leaves the separator as a gas outlet stream. Use the given
process condition and Raoult's law, determine composition of the gas outlet stream and
material balance of each compound.
Some errors are detected during the process and suddenly the temperature of the system is
decreased to 70 °C. Compare the composition of the gas outlet stream and the material
balance of each compound between temperature 80 °C and 70 °C. Explain how the
temperature affects the system's material balance. Justify your answer.
Ya = PA/Pbp = XAPA (T)/Pbp
Antoine Equation constants:
Compound
1-butanol
Methanol
A
7.36366
8.08097
B
1305.198
158.271
C
173.427
239.726
Transcribed Image Text:A gas stream consists of 35 mol % 1-butanol, 25 mol % methanol and the balanced nitrogen is fed to a gas-liquid separator with flowrate of 100 mol/min. Objective of the separator is to condense the 1-butanol and methanol. In the separator, the gas mixture is in equilibrium with its liquid at dew point temperature (Top) of 80 °C and pressure of 4600 mmHg. The liquid mixture consisting of 63 mol % 1-butanol and the balanced methanol leaves the separator as liquid outlet stream. On the other hand, the gas mixture consists of 1-butanol, methanol and non-condensable nitrogen leaves the separator as a gas outlet stream. Use the given process condition and Raoult's law, determine composition of the gas outlet stream and material balance of each compound. Some errors are detected during the process and suddenly the temperature of the system is decreased to 70 °C. Compare the composition of the gas outlet stream and the material balance of each compound between temperature 80 °C and 70 °C. Explain how the temperature affects the system's material balance. Justify your answer. Ya = PA/Pbp = XAPA (T)/Pbp Antoine Equation constants: Compound 1-butanol Methanol A 7.36366 8.08097 B 1305.198 158.271 C 173.427 239.726
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