Uptake dynamics and diffusion of HCl in sulfuric acid solution measured in single levitated microdroplets

DC FieldValueLanguage
dc.contributor.authorSchwell, M
dc.contributor.authorBaumgartel, H
dc.contributor.authorWeidinger, I
dc.contributor.authorKramer, B
dc.contributor.authorVortisch, H
dc.contributor.authorWoste, L
dc.contributor.authorLeisner, T
dc.contributor.authorRuhl, E
dc.date.accessioned2021-12-23T16:08:43Z-
dc.date.available2021-12-23T16:08:43Z-
dc.date.issued2000
dc.identifier.issn10895639
dc.identifier.urihttps://osnascholar.ub.uni-osnabrueck.de/handle/unios/8416-
dc.description.abstractThe uptake dynamics of HCl by single sulfuric acid microdroplets under stratospheric conditions is investigated. The droplets are typically 30-70 mu m in diameter and weakly charged so that they can be stored in an electrodynamic trap. The gas uptake of the droplets is monitored either by measuring their size by angle resolved Mie- scattering patterns or by electrostatic balancing of the droplets in the trap. At low temperatures and high sulfuric acid concentration (T < 190 K for 48 wt % H2SO4 and T ( 195 K for 56 wt % H2SO4, respectively), liquid-phase diffusion inside the droplet is the rate-limiting step in the overall uptake process. In this regime, the diffusion coefficients D-liq of HCl in supercooled sulfuric acid solutions are found to increase strongly with temperature and H2O concentration. The results are discussed with respect to diffusion models that have been proposed recently. In contrast, at higher temperatures and lower sulfuric acid concentrations (30-40 wt % H2SO4, 185-207 K) gas-phase diffusion with subsequent accommodation/dissolution at the liquid surface determines the observed uptake velocity. A new method to deduce accommodation coefficients alpha is proposed.
dc.language.isoen
dc.publisherAMER CHEMICAL SOC
dc.relation.ispartofJOURNAL OF PHYSICAL CHEMISTRY A
dc.subjectAEROSOLS
dc.subjectChemistry
dc.subjectChemistry, Physical
dc.subjectCOEFFICIENTS
dc.subjectDEPENDENCE
dc.subjectDIFFUSIVITIES
dc.subjectDROPLETS
dc.subjectOZONE
dc.subjectPhysics
dc.subjectPhysics, Atomic, Molecular & Chemical
dc.subjectSOLUBILITY
dc.subjectSUPERCOOLED LIQUIDS
dc.subjectTEMPERATURES
dc.subjectVISCOSITY
dc.titleUptake dynamics and diffusion of HCl in sulfuric acid solution measured in single levitated microdroplets
dc.typejournal article
dc.identifier.doi10.1021/jp994200c
dc.identifier.isiISI:000088490300007
dc.description.volume104
dc.description.issue29
dc.description.startpage6726
dc.description.endpage6732
dc.contributor.orcid0000-0001-9316-6349
dc.contributor.orcid0000-0001-9693-7671
dc.contributor.researcheridR-9029-2016
dc.contributor.researcheridA-2391-2013
dc.publisher.place1155 16TH ST, NW, WASHINGTON, DC 20036 USA
dcterms.isPartOf.abbreviationJ. Phys. Chem. A
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