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Water contain in raw natural gas will contribute to the formation of gas hydrates and must be removed by using dehydration process. In this process, wet natural gas stream containing 2 mole% water is fed to the bottom stream of an absorption column at a rate of 12000 lb-mole/day, flows upwards and is contacted with a recycled liquid solvent (triethylene glycol, TEG) containing 1.5 nole% water fed from the top stream of the column. The dried natural gas leaving the top section of the absorption column contains 0.2 mole % water. The water-rich TEG solvent leaves the bottom section of the column and is fed to a distillation column to remove water. The top stream of the distillation column contains only pure water and the bottom stream containing regenerated iquid solvent is recycled back to the absorption column. For efficient dehydration process, it is found that 37 Ibm of TEG is required for every 1.0 Ibm of water removed from the wet natural gas. (Molecular weight of TEG= 150.2) a) Draw and completely label the above process. >) Calculate the amount of water leaving the overhead of the distillation column. =) Calculate the amount of TEG required (in lbmoles/day).

Water contain in raw natural gas will contribute to the formation of gas hydrates and must be removed by using dehydration process. In this process, wet natural gas stream containing 2 mole% water is fed to the bottom stream of an absorption column at a rate of 12000 lb-mole/day, flows upwards and is contacted with a recycled liquid solvent (triethylene glycol, TEG) containing 1.5 nole% water fed from the top stream of the column. The dried natural gas leaving the top section of the absorption column contains 0.2 mole % water. The water-rich TEG solvent leaves the bottom section of the column and is fed to a distillation column to remove water. The top stream of the distillation column contains only pure water and the bottom stream containing regenerated iquid solvent is recycled back to the absorption column. For efficient dehydration process, it is found that 37 Ibm of TEG is required for every 1.0 Ibm of water removed from the wet natural gas. (Molecular weight of TEG= 150.2) a) Draw and completely label the above process. >) Calculate the amount of water leaving the overhead of the distillation column. =) Calculate the amount of TEG required (in lbmoles/day).

Introduction to Chemical Engineering Thermodynamics
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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Water contain in raw natural gas will contribute to the formation of gas hydrates and must be removed by using dehydration process. In this process, wet natural gas stream containing 2 mole% water is fed to the bottom stream of an absorption column at a rate of 12000 lb-mole/day, flows upwards and is contacted with a recycled liquid solvent (triethylene glycol, TEG) containing 1.5 mole% water fed from the top stream of the column. The dried natural gas leaving the top section of the absorption column contains 0.2 mole % water. The water-rich TEG solvent leaves the bottom section of the column and is fed to a distillation column to remove water. The top stream of the distillation column contains only pure water and the bottom stream containing regenerated liquid solvent is recycled back to the absorption column. For efficient dehydration process, it is found that 37 Ibm of TEG is required for every 1.0 Ibm of water removed from the wet natural gas. (Molecular weight of TEG= 150.2) a) Draw and completely label the above process. b) Calculate the amount of water leaving the overhead of the distillation column. c) Calculate the amount of TEG required (in lbmoles/day).
Transcribed Image Text:Water contain in raw natural gas will contribute to the formation of gas hydrates and must be removed by using dehydration process. In this process, wet natural gas stream containing 2 mole% water is fed to the bottom stream of an absorption column at a rate of 12000 lb-mole/day, flows upwards and is contacted with a recycled liquid solvent (triethylene glycol, TEG) containing 1.5 mole% water fed from the top stream of the column. The dried natural gas leaving the top section of the absorption column contains 0.2 mole % water. The water-rich TEG solvent leaves the bottom section of the column and is fed to a distillation column to remove water. The top stream of the distillation column contains only pure water and the bottom stream containing regenerated liquid solvent is recycled back to the absorption column. For efficient dehydration process, it is found that 37 Ibm of TEG is required for every 1.0 Ibm of water removed from the wet natural gas. (Molecular weight of TEG= 150.2) a) Draw and completely label the above process. b) Calculate the amount of water leaving the overhead of the distillation column. c) Calculate the amount of TEG required (in lbmoles/day).
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