DETERMINATION OF WATER ACTIVITY IN AMMONIUM-SULFATE AND SULFURIC-ACIDMIXTURES USING LEVITATED SINGLE PARTICLES

Authors
KIM YP PUN BKL CHAN CK FLAGAN RC SEINFELD JH
Citation
Yp. Kim et al., DETERMINATION OF WATER ACTIVITY IN AMMONIUM-SULFATE AND SULFURIC-ACIDMIXTURES USING LEVITATED SINGLE PARTICLES, Aerosol science and technology, 20(3), 1994, pp. 275-284
Citations number
33
Categorie Soggetti
Engineering, Mechanical","Environmental Sciences
Journal title
Aerosol science and technology → ACNP
ISSN journal
02786826
Volume
20
Issue
3
Year of publication
1994
Pages
275 - 284
Database
ISI
SICI code
0278-6826(1994)20:3<275:DOWAIA>2.0.ZU;2-5
Abstract
Water activities of ammonium sulfate-sulfuric acid mixtures with ammon ium to sulfate molar ratios be between 0 and 2 were measured bvu a sph erical void electrodynamic levitator at relative humidities (RH) of 0. 18-0.90. Since the composition of the solid particles is subject to un certainty, solution properties were determined relative to the known p roperties at RH about 0.75-0.90. The data were compared with other mea surements and the estimates from the Zdanovskii-Stokes-Robinson (ZSR) method and SCAPE, a newly developed gas-particle equilibrium model, an d generally were found to be in good agreement.