Browsing by Author "Rusanen, Anton"

I modelled the contribution of extremely low volatility organic compounds, ELVOC, to particle growth in simple conditions. This included a background aerosol particles that were allowed to develop with the gas phase for 7 hours and particles injected and grown for 8 subsequent hours. The composition and size of the injected particles was analysed. The model used to do this was MALTE- BOX with MCM 3.3 chemistry for α-pinene and inorganic molecules and an ELVOC generation mechanism developed in the group. The density, saturation vapour pressure and diffusion coefficient for these vapours were estimated using several methods from literature. The estimation shows that 21 of the 37 stable molecules in the generating mechanism, would be classified as ELVOC at 293.15 K. The resulting particle growth and composition shows similarities to already published results, where ELVOC contribution is large at early stages of particle growth and diminishes as less volatile compounds are able to condense. The contribution of ELVOC also reacts sensibly to changes in ambient conditions and remains important for early particle growth in all cases studied.