High-Throughput Generation of Aircraft-Like Soot

Title: High-Throughput Generation of Aircraft-Like Soot

Aircrafts are an important source of ultrafine soot. High costs and limited access to aircraft engines make it difficult to perform routine studies on such soot. For this reason, high-throughput, laboratory units for generation of aircraft-like soot are needed to quantify and understand the impact of such emissions on public health and climate change. Here, enclosed spray combustion (ESC) of jet fuel is used to generate high soot concentrations with particle characteristics matching those of soot from aircraft engines and controlled by the ESC Effective eQuivalence Ratio (EQR). In particular, at low EQR, soot had similar mobility, primary particle diameter, organic carbon to total carbon ratio and Raman spectra to that measured from real aircrafts. The high concentrations allowed for characterization of the specific surface area and pore size distributions of such aircraft-like soot. At higher EQR, the mobility and primary particle sizes increased along with the degree of graphitization as quantified by Raman spectroscopy and X-ray diffraction. Having such soot generators greatly facilitate the identification of operation conditions that can eliminate soot emissions by jet fuel combustion.

Speaker Bio: Una Trivanovic is a PhD Candidate at the Particle Technology Laboratory at ETH Zürich supervised by Prof. Sotiris Pratsinis. She obtained her Bachelor of Science in Mechanical Engineering in 2016 from Montana State University with honors. After a year working as a reliability engineer in industry, she completed her Master of Applied Sciences at the University of British Columbia where she worked with Prof. Steven Rogak. During her masters she studied the size and morphology of soot aerosols from marine engines operating with alternative fuels and the effects of fuel, water and salt addition on soot produced by gas flares. She received the National Science and Engineering Research Council of Canada (NSERC), Canada Graduate Scholarship in 2020 to fund doctoral research on soot to aid in reducing its climate and health effects as well as a number of oral and poster presentation awards at scientific conferences, including the International Aerosol Conference 2022. Her research is funded by the Swiss National Science Foundation.

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