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FTIR method for VLE measurements of acid‐gas–alkanolamine systems
Author(s) -
Rogers William J.,
Bullin Jerry A.,
Davison Richard R.,
Frazier Richard E.,
Marsh Kenneth N.
Publication year - 1997
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.690431210
Subject(s) - alkanolamine , diethanolamine , acid gas , hydrogen sulfide , chemistry , carbon dioxide , aqueous solution , sour gas , fourier transform infrared spectroscopy , carbonyl sulfide , inorganic chemistry , natural gas , chemical engineering , organic chemistry , sulfur , engineering
Abstract 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 (VLE) data impedes the commercial application of more efficient alkanolamine systems. The objective of this research was to develop an FTIR apparatus and an in‐situ technique capable of making VLE measurements of acid‐gas–aqueous alkanolamine systems and to improve the accuracy of vapor–liquid equilibrium measurements at low hydrogen sulfide and carbon dioxide concentrations. The new FTIR apparatus and technique were tested in VLE measurements of low concentrations of carbon dioxide and hydrogen sulfide in aqueous mixtures of diethanolamine.