Distribution of ammonium salts between liquid and steam at high temperatures

Conference · Fri May 01 04:00:00 EDT 1992

OSTI ID:10147349

Simonson, J M; Palmer, D A

Partitioning of ammonium chloride between liquid water and steam was measured from 120 to 350{degrees}C by directly sampling the vapor and liquid phases. Liquid-phase pH at temperature was controlled by addition of excess HCl or excess ammonia to the ammonium chloride solutions. Samples were analyzed for total chloride and total nitrogen content by ion chromatography, and for excess ammonia or hydrogen ion by titration. Thermodynamic partitioning constants for ammonium chloride were calculated from the observed liquid- and vapor-phase solute molalities and the solute levels predicted on the basis of transport as HCl and NH{sub 3}. The constants obtained were found to be well represented by a simple function of temperature and solvent density. The results of this study were combined with available information on ammonium ion hydrolysis and the volatility of HCl and NH{sub 3} to calculate levels of solute enhancement expected on formation of early condensate in steam generator systems.

• Research Organization: Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States); Electric Power Research Inst., Palo Alto, CA (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 10147349
• Report Number(s): CONF-9206162--1; ON: DE92013412
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
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AMMONIA
AMMONIUM CHLORIDES
BULK DENSITY
CHEMICAL AND PHYSICOCHEMICAL PROPERTIES
CHROMATOGRAPHY
COOLING AND HEAT TRANSFER EQUIPMENT AND SYSTEMS
FOSSIL-FUEL POWER PLANTS
HYDROCHLORIC ACID
HYDROLYSIS
MATHEMATICAL MODELS
PARTITION
PH VALUE
STEAM
TEMPERATURE DEPENDENCE
TITRATION
VOLATILITY
WATER