Evaluation of the electrode method for measuring H/sub 2/S vapor pressure over alkanolamine solutions

Conference · Thu Jan 01 04:00:00 EST 1987

OSTI ID:6094971

Austgen, D M; Rochelle, G T

A new electrode method for measuring the equilibrium vapor pressure of H/sub 2/S over any sulfide solution was tested. The method relates the electropotential difference produced between pH and silver/sulfide ion specific electrodes to the H/sub 2/S equilibrium vapor pressure of solution. The experimental technique is simple and time efficient. In this work, H/sub 2/S equilibrium vapor pressures were measured from 10/sup -4/ kPa to 10 kPa at 25/sup 0/C in aqueous solutions of monoethanolamine-MEA (2.5 N), diethanolamine-DEA (2.0N), and methyldiethanolamine-MDEA (1.0 N and 4.28 N). The H/sub 2/S vapor-liquid equilibria (VLE) of 4.28 N MDEA was also examined at 40/sup 0/C. The results indicate that the addition of MEA to a MDEA solution reduces the H/sub 2/S vapor pressure only at low H/sub 2/S loadings.

• OSTI ID: 6094971
• Report Number(s): CONF-870323-
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400400 -- Electrochemistry
ALCOHOLS
AMINES
AQUEOUS SOLUTIONS
CHALCOGENIDES
CHEMISTRY
DISPERSIONS
ELECTROCHEMISTRY
ELECTRODES
EQUILIBRIUM
ETHANOL
EVALUATION
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
HYDROXY COMPOUNDS
MEASURING METHODS
MEDIUM TEMPERATURE
MIXTURES
ORGANIC COMPOUNDS
PH VALUE
PHASE STUDIES
PHYSICAL PROPERTIES
SOLUTIONS
SULFIDES
SULFUR COMPOUNDS
THERMODYNAMIC PROPERTIES
VAPOR PRESSURE