The characterization and removal of foam promoting impurities from blended methyldiethanolamine - piperazine solution using membrane

The characterization and removal of foam promoting impurities from blended methyldiethanolamine - piperazine solution using membrane

The removal of acid gases from natural gas stream is an important process in many gas processing plants and for environmental protection. The most widely used acid gas removal technology nowadays is the absorption process using amine-based solvent. Foaming is the major cause that leads operational p...

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Main Author: Ratman, Iwan
Format: Thesis
Language:English
Published: 2009
Online Access:http://eprints.utm.my/id/eprint/16926/1/IwanRatmanPFKM2009.pdf
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spelling my-utm-ep.169262017-06-20T07:23:25Z The characterization and removal of foam promoting impurities from blended methyldiethanolamine - piperazine solution using membrane 2009 Ratman, Iwan The removal of acid gases from natural gas stream is an important process in many gas processing plants and for environmental protection. The most widely used acid gas removal technology nowadays is the absorption process using amine-based solvent. Foaming is the major cause that leads operational problems, resulting in excessive solvent losses, failure to meet treated gas specification and a reduction in gas treating capacity. Therefore, the main objectives of this research were to study the foam characteristics and the surface tension phenomenon of alkanolamines solution and to reduce their foaming promoters. The effect of natural gas impurities (foam promoters) in the blended methyldiethanolamine (MDEA)-piperazine solution such as hydrocarbon liquids, iron sulfide (dissolved solid), sodium chloride (salt), acetic acid (organic acid), methanol (hydrate inhibitor) and glycol (dehydrating agent) were investigated. The concentration of MDEA was found to significantly influence the foam activity in the solution. Iron sulfide, hydrocarbon and sodium chloride present in the solution had been identified as the impurities which apparently contributed to the high foaming tendency. At 5000 ppm concentration of impurities, the foam height achieved was 425 ml. Iron sulfide appeared to be the major foam promoter in the range of concentration solutions studied. Response surface methodology and central composite design had been applied to optimize the three factors that affected the foaming phenomenon. These factors were then correlated to the surface tension and foaming tendency. Asymmetric mixed matrix membrane (MMM) was applied to remove foam promoters in the amine solvent in order to reduce its foaming tendency. The MMM characteristics and performance were tested using scanning electron microscope, differential scanning calorimetry, Fourier transform infrared and membrane filtration tests. The contents of iron sulfide, hydrocarbon and sodium chloride as the main foam promoters had been successfully reduced as indicated by reduction of surface tension values by 12 %, 6.3% and 16 % respectively. These results indicated that membrane is a promising and viable technology to enhance the effectiveness of gas treatment system through the reduction of foam formation 2009 Thesis http://eprints.utm.my/id/eprint/16926/ http://eprints.utm.my/id/eprint/16926/1/IwanRatmanPFKM2009.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:81859?queryType=vitalDismax&query=The+characterization+and+removal+of+foam+promoting+impurities&public=true phd doctoral Universiti Teknologi Malaysia, Faculty of Chemical and Natural Resources Engineering Faculty of Chemical and Natural Resources Engineering
institution Universiti Teknologi Malaysia
collection UTM Institutional Repository
language English
description The removal of acid gases from natural gas stream is an important process in many gas processing plants and for environmental protection. The most widely used acid gas removal technology nowadays is the absorption process using amine-based solvent. Foaming is the major cause that leads operational problems, resulting in excessive solvent losses, failure to meet treated gas specification and a reduction in gas treating capacity. Therefore, the main objectives of this research were to study the foam characteristics and the surface tension phenomenon of alkanolamines solution and to reduce their foaming promoters. The effect of natural gas impurities (foam promoters) in the blended methyldiethanolamine (MDEA)-piperazine solution such as hydrocarbon liquids, iron sulfide (dissolved solid), sodium chloride (salt), acetic acid (organic acid), methanol (hydrate inhibitor) and glycol (dehydrating agent) were investigated. The concentration of MDEA was found to significantly influence the foam activity in the solution. Iron sulfide, hydrocarbon and sodium chloride present in the solution had been identified as the impurities which apparently contributed to the high foaming tendency. At 5000 ppm concentration of impurities, the foam height achieved was 425 ml. Iron sulfide appeared to be the major foam promoter in the range of concentration solutions studied. Response surface methodology and central composite design had been applied to optimize the three factors that affected the foaming phenomenon. These factors were then correlated to the surface tension and foaming tendency. Asymmetric mixed matrix membrane (MMM) was applied to remove foam promoters in the amine solvent in order to reduce its foaming tendency. The MMM characteristics and performance were tested using scanning electron microscope, differential scanning calorimetry, Fourier transform infrared and membrane filtration tests. The contents of iron sulfide, hydrocarbon and sodium chloride as the main foam promoters had been successfully reduced as indicated by reduction of surface tension values by 12 %, 6.3% and 16 % respectively. These results indicated that membrane is a promising and viable technology to enhance the effectiveness of gas treatment system through the reduction of foam formation
format Thesis
qualification_name Doctor of Philosophy (PhD.)
qualification_level Doctorate
author Ratman, Iwan
spellingShingle Ratman, Iwan
The characterization and removal of foam promoting impurities from blended methyldiethanolamine - piperazine solution using membrane
author_facet Ratman, Iwan
author_sort Ratman, Iwan
title The characterization and removal of foam promoting impurities from blended methyldiethanolamine - piperazine solution using membrane
title_short The characterization and removal of foam promoting impurities from blended methyldiethanolamine - piperazine solution using membrane
title_full The characterization and removal of foam promoting impurities from blended methyldiethanolamine - piperazine solution using membrane
title_fullStr The characterization and removal of foam promoting impurities from blended methyldiethanolamine - piperazine solution using membrane
title_full_unstemmed The characterization and removal of foam promoting impurities from blended methyldiethanolamine - piperazine solution using membrane
title_sort characterization and removal of foam promoting impurities from blended methyldiethanolamine - piperazine solution using membrane
granting_institution Universiti Teknologi Malaysia, Faculty of Chemical and Natural Resources Engineering
granting_department Faculty of Chemical and Natural Resources Engineering
publishDate 2009
url http://eprints.utm.my/id/eprint/16926/1/IwanRatmanPFKM2009.pdf
_version_ 1747815120142073856

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