Polymers as advanced materials for desiccant applications. Part 3: Alkali salts of PSSA and polyAMPSA and copolymers of polyAMPSASS

Conference · Tue Aug 01 04:00:00 EDT 1995

OSTI ID:87439

Czanderna, A W; Herdt, G C ^[1]; Tillman, N T ^[2]

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1. National Renewable Energy Lab., Golden, CO (United States)
2. Eastman Kodak Co., Rochester, NY (United States)

This paper is primarily concerned with evaluating the water vapor sorption properties and isotherm shape of 30 laboratory-synthesized alkali salts of anionic polymers and/or copolymers. These have potential as next-generation, low-cost candidate advanced-desiccant materials (ADMS) for use in desiccant cooling systems (DCSs) that process water vapor to produce cooling. Background information is presented about previous papers on polymers as ADMs, computer parametric studies of an ideal desiccant for DCSS, and the criteria used for assessing improved sorption performance. Sorption isotherms, kinetics, and cyclic stability were measured using a quartz crystal microbalance (QCM). Particular emphasis was focused on obtaining the sorption properties of alkali salts of the anionic polymers of 2-acrylamido-2-methyl-l-propane sulfonic acid (AMPSA), five copolymers with the sodium salt of polyAMPSA, i.e., polyAMPSASS, and comparing these with the alkali salts (anionic polymers) of polystyrene sulfonic acid (PSSA), i.e., lithium salt (PSSALS), sodium salt (PSSASS), potassium salt (PSSAKS), and cesium salt (PSSACS). Two commercially available and two laboratory-synthesized cationic polymers were also evaluated, and their sorption properties are compared with those of the anionic polymers and copolymers. Sorption capacities are reported from the isotherms and discussed.

• DOE Contract Number: AC36-83CH10093
• OSTI ID: 87439
• Report Number(s): CONF-950104--
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
ADSORPTION ISOTHERMS
COOLING SYSTEMS
DESICCANTS
OPEN-CYCLE COOLING SYSTEMS
SORPTIVE PROPERTIES