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FTIR measurements of acid‐gas–methyldiethanolamine systems
Author(s) -
Rogers William J.,
Bullin Jerry A.,
Davison Richard R.
Publication year - 1998
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690441110
Subject(s) - alkanolamine , acid gas , hydrogen sulfide , chemistry , sour gas , aqueous solution , fourier transform infrared spectroscopy , carbon dioxide , amine gas treating , carbonyl sulfide , hydrogen , inorganic chemistry , natural gas , chemical engineering , organic chemistry , sulfur , engineering
The standard industrial process for the purification of natural gas is to remove acid gases, mainly hydrogen sulfide and carbon dioxide, by the absorption and reaction of these gases with alkanolamines, but the lack of reliable and accurate vapor–liquid equilibrium (VLB) data impedes the commercial application of more efficient alkanolamine systems. A novel Fourier‐transform infrared (FTIR) technique was developed to make in‐situ VLE measurements of acid‐gas‐aqueous alkanolamine systems and to improve the accuracy of VLE measurements at low hydrogen sulfide and carbon dioxide concentrations. VLE measurements of low carbon dioxide and hydrogen sulfide concentrations in aqueous mixtures of methyldiethanolamine (MDEA) are reported using the new FTIR technique.