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Reinstallation of the plant for formation of aerosols by homogeneous nucleation during evaporation

  • Aerosol formation during homogeneous nucleation through evaporation is a complex process that plays a crucial role in atmospheric aerosol formation, influencing cloud formation, precipitation, and air quality. In process engineering, an aerosol can be generated undesirably, for example during flue gas scrubbing or condensation. As a result, the pollutant is discharged from the process as fineAerosol formation during homogeneous nucleation through evaporation is a complex process that plays a crucial role in atmospheric aerosol formation, influencing cloud formation, precipitation, and air quality. In process engineering, an aerosol can be generated undesirably, for example during flue gas scrubbing or condensation. As a result, the pollutant is discharged from the process as fine particles in the gas and must be subsequently separated in a very complex and cost-intensive manner. On the other hand, some processes also aim to produce aerosols of a certain size and concentration which will be used, for example, in cosmetics and pharmaceuticals. This thesis investigates the factors that influence aerosol formation during homogeneous nucleation through evaporation, focusing on the effects of temperature, different heights of a direct contact column, and gas-phase composition. The rate of homogeneous nucleation is strongly influenced by temperature and pressure. As temperature decreases, the energy barrier required for the formation of a critical nucleus decreases as well, leading to an escalation in nucleation rates. Similarly, elevated pressure conditions result in a higher concentration of gas-phase molecules, fostering collisions and subsequently augmenting nucleation rates. The role of pressure in homogeneous nucleation is closely tied to the concept of vapor pressure and the phase transition from liquid to gas. Certain gas-phase species, such as water vapor, exhibit a higher propensity for nucleation compared to others due to their favorable intermolecular interactions. The presence of these species can bolster aerosol formation during homogeneous nucleation. These findings offer valuable insights into the processes governing the formation and enlargement of aerosol particles in a technical process such as wettening , thereby contributing to a more comprehensive understanding of aerosol dynamics.show moreshow less

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Metadaten
Document Type:Master's Thesis
Zitierlink: https://opus.hs-offenburg.de/8686
Bibliografische Angaben
Title (English):Reinstallation of the plant for formation of aerosols by homogeneous nucleation during evaporation
Author:Mohammad Mazarei
Advisor:Susanne Mall-Gleißle, Heide Biollaz
Year of Publication:2024
Granting Institution:Hochschule Offenburg
Place of publication:Offenburg
Publisher:Hochschule Offenburg
Page Number:VI, 69
Language:English
Inhaltliche Informationen
Institutes:Fakultät Maschinenbau und Verfahrenstechnik (M+V)
Collections of the Offenburg University:Abschlussarbeiten / Master-Studiengänge / MPE
DDC classes:600 Technik, Medizin, angewandte Wissenschaften
GND Keyword:Aerosol; Verdunstung
Tag:3-WEM; Aerosol formation; Three-wavelengths Extinction Measurement Module; column module; evaporation; homogeneous nucleation
Formale Angaben
Open Access: Closed 
Licence (German):License LogoUrheberrechtlich geschützt