PhD Thesis Defence Presentations - Stella Eftychia Manavi
Presentation Title (Τίτλος Παρουσίασης): Improving the simulation of intermediate volatility organic compounds and their contribution to secondary organic aerosol formation in the atmosphere.
Presentation Type (Τύπος Παρουσίασης): PhD Thesis Defence Presentations
Speakers Full Name (Ονοματεπώνυμο): Stella Eftychia Manavi
Speakers Affiliation (Προέλευση Ομιλητή): Department of Chemical Engineering, University of Patras
Seminar Room (Αίθουσα): "A. C. Payatakes" Library
Event Date: Tue, Dec 16 2025,
Time:
17:15 - 21:00
Live webConference Link: https://upatras-gr.zoom.us/j/93270670238?pwd=kSEJBhDKEAViB9lztQuXrLrqCns5nz.1
Abstract (Περίληψη)
In the atmosphere, secondary organic aerosol (SOA) is an important constituent of fine particulate matter (PM2.5). SOA is formed through the condensation of organic vapors produced from the oxidation of volatile precursors. Intermediate volatility organic compounds (IVOCs) are organic vapors with an effective saturation concentration (C*) at 298K between 103 and 106 μg m-3, and they can be an important source of SOA formation in the atmosphere. In the first part of this thesis, we develop a new approach for simulating IVOCs, and SOA formed from IVOCs (SOA-iv) in chemical transport models (CTMs). The main idea is to treat IVOCs as lumped species that retain their chemical characteristics, allowing for a more explicit representation of their SOA formation potential and chemistry than previous highly parameterized schemes. Moreover, this new lumped species approach allows the quantification of both the overall role of IVOCs in SOA formation and the role of individual compounds in the IVOC range. The first application of the lumped species approach focused on IVOC emitted from on-road diesel and gasoline vehicles over Europe, whereas the second application of the lumped species approach aimed at biomass burning IVOCs. In addition to on-road and biomass burning IVOCs, we also developed a new parametrization to describe SOA formed from the ozonolysis of sesquiterpenes and the sequential aging of the ozonolysis products based on smog chamber experiments conducted with β-caryophyllene.
Speakers Short CV (Σύντομο Βιογραφικό Ομιλητή)
Education
Mar 2019 - Dec 2019 : PhD, Chemical Engineering, Department of Chemical Engineering, University of Patras, Greece.
Sep 2019 - Mar 2019: Diploma in Chemical Engineering, Department of Chemical Engineering, University of Patras, Greece.
Journal Articles
2025 Manavi, S.E.I., Aktypis, A., Siouti, E., Skyllakou, K., Myriokefalitakis, S., Kanakidou, M., and Pandis, S.N., Atmospheric aerosol spatial variability: Impacts on air quality and climate change, One Earth, 8(3), 101237, https://doi.org/10.1016/j.oneear.2025.101237.
2024 Manavi, S.E.I. and Pandis, S.N., Contribution of intermediate-volatility organic compounds from on-road transport to secondary organic aerosol levels in Europe, Atmos. Chem. Phys., 24, 891-909, https://doi.org/10.5194/acp-24-891-2024.
2022 Manavi, S.E.I. and Pandis, S.N., A lumped species approach for the simulation of secondary organic aerosol production from intermediate-volatility organic compounds (IVOCs): application to road transport in PMCAMx-iv (v1.0), Geosci. Model Dev., 15, 7731–7749, https://doi.org/10.5194/gmd-15-7731-2022.
2018 Stefas J.H., Manavi, S.E.I., Paloukis F.E. and Spartinos D.N., Mathematical modeling, steady state simulation, parametric analysis and optimization of SO2
capture in a countercurrent moving bed (CaO and C) reactor, J. Chem. Technol. Biotechnol., 93, 2681-2690, https://doi.org/10.1002/jctb.5622.
Oral presentations
Sep 2025 Manavi, S.E.I., Matrali A, Uruci P., Skyllakou K., Vasilakopoulou C.N., and Pandis, S.N., Chamber to Code: Investigating SOA formation from beta-caryophyllene, European Aerosol Conference (EAC), Lecce, Italy.
May 2025 Manavi, S.E.I., Skyllakou K., Siouti E., and Pandis, S.N., Atmospheric aerosol from on-road transport in Europe: The role of different vehicle types, European Geosciences Union General Assembly 2025 (EGU), Vienna, Austria.
Aug 2024 Manavi, S.E.I. and Pandis, S.N., Simulating intermediate volatility organic compounds (IVOCs) emitted from biomass burning utilizing a lumped species approach, European Aerosol Conference (EAC), Tampere, Finland.
Sep 2022 Manavi, S.E.I. and Pandis, S.N., Simulating Intermediate Volatility Compounds (IVOCs) in Chemical Transport Models: A lumped approach, 11th International Aerosol Conference (iAC), Athens, Greece.