The high charge fraction of flame-generated particles in the size range below 3 nm measured by enhanced particle detectors
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Wang , Y , Kangasluoma , J , Attoui , M , Fang , J , Junninen , H , Kulmala , M , Petäjä , T & Biswas , P 2017 , ' The high charge fraction of flame-generated particles in the size range below 3 nm measured by enhanced particle detectors ' , Combustion and Flame , vol. 176 , pp. 72-80 . https://doi.org/10.1016/j.combustflame.2016.10.003
| Title: | The high charge fraction of flame-generated particles in the size range below 3 nm measured by enhanced particle detectors |
| Author: | Wang, Yang; Kangasluoma, Juha; Attoui, Michel; Fang, Jiaxi; Junninen, Heikki; Kulmala, Markku; Petäjä, Tuukka; Biswas, Pratim |
| Contributor: | University of Helsinki, Department of Physics University of Helsinki, Department of Physics University of Helsinki, Department of Physics University of Helsinki, Department of Physics University of Helsinki, Department of Physics |
| Date: | 2017-02 |
| Language: | eng |
| Number of pages: | 9 |
| Belongs to series: | Combustion and Flame |
| ISSN: | 0010-2180 |
| URI: | http://hdl.handle.net/10138/307935 |
| Abstract: | Charging in flames significantly affects the properties of the resultant particles produced because of its influence in almost all stages of particle formation. The charging characteristics of flame-generated sub 3 nm particles were investigated with three enhanced particle detectors including a high resolution differential mobility analyzer (DMA) coupled with an electrometer, a particle size magnifier coupled with a butanol-based condensation particle counter (PSM-bCPC), and an atmospheric pressure interface time-of-flight mass spectrometer (APi-TOF). Up to 95% of the flame-generated sub-3 nm particles were charged at a sampling height of 5 mm above the burner, indicating the existence of a strong ionization process in the investigated flame. This high fraction of charged particles contradicts the classical charging theories, which predict |
| Subject: |
Flame synthesis
Charge fraction Sub-3 nm particle Titanium dioxide Differential mobility analyzer Mass spectrometry ATMOSPHERIC AEROSOL NUCLEATION DIFFERENTIAL MOBILITY ANALYSIS HIGH-RESOLUTION MOBILITY DETAILED ION CHEMISTRY METHANE-OXYGEN FLAMES NEGATIVE-IONS SULFURIC-ACID SOOT PARTICLES MASS-SPECTROMETER PREMIXED FLAMES 114 Physical sciences |
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