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Aggregations- und Evaporationsdynamik von Clustern und Aerosolpartikeln im H2SO4-H2O-System

dc.contributor.advisorZeuch, Thomas Prof. Dr.
dc.contributor.authorBecker, Daniel
dc.format.extentiv, 172 Seitende
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.titleAggregations- und Evaporationsdynamik von Clustern und Aerosolpartikeln im H<sub>2</sub>SO<sub>4</sub>-H<sub>2</sub>O-Systemde
dc.title.translatedAggregation and Evaporation Dynamics of Clusters and Aerosol Particles in the H<sub>2</sub>SO<sub>4</sub>-H<sub>2</sub>O-Systemde
dc.contributor.refereeZeuch, Thomas Prof. Dr.
dc.description.abstractengSulfuric acid and water are two key compounds in the formation of atmospheric aerosols and are therefore relevant in the context of climate research. In this work, a modified experimental setup is presented, using the ozonolysis of 2-butene in presence of sulfur dioxide to obtain a highly supersaturated atmosphere of sulfuric acid vapor. A newly implemented SMPS-system as well as an optimized sampling procedure allow for real-time monitoring of the resulting particle formation in the early phase of the experiment. This process is very sensitive with respect to the initial amount of sulfur dioxide and thus, different scenarios of sulfuric acid driven particle growth can be prepared and studied. The corresponding experimental time profiles of individual particle size classes and particle size distributions serve as references for the validation of a kinetic model, also incorporating predicted cluster decomposition rates based on quantum chemical calculations. The strong dependence of simulation results on those decomposition rates allows evaluation of the corresponding predictions. Furthermore, binary systems (e.g. H<sub>2</sub>SO<sub>4</sub>-H<sub>2</sub>O, but also other additives) are investigated, indicating stabilization of hydrated sulfuric acid clusters. To study evaporation of pure water clusters, another kinetic model is presented and simulated cluster distributions are compared to mass spectra of Na-doped water clusters from a molecular beam
dc.contributor.coRefereeVana, Philipp Prof. Dr.
dc.subject.engsulfuric acid clustersde
dc.subject.engwater clustersde
dc.subject.engcluster evaporationde
dc.subject.engnew particle formationde
dc.subject.engbutene ozonolysisde
dc.subject.engkinetic modelingde
dc.affiliation.instituteFakultät für Chemiede
dc.subject.gokfullChemie  (PPN62138352X)de
dc.notes.confirmationsentConfirmation sent 2022-11-29T06:15:02de

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