Particle and Aerosol Research
Vol. 14, No. 1, March 2018, Pages 17-24
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ISSN : 1738-8716 (Print)
ISSN : 2287-8130 (Online)
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Study on electrical charge distribution of aerosol
using a Gerdien ion counter
Yun-Haeng Joe1), Joonmok Shim1), Il-Kyoung Shin1)2), ⋅Se-Jin Yook2), ⋅Hyun-Seol Park1) *
1)Climate Change Research Division, Korea Institute of Energy Research
2)Department of Mechanical Engineering, Hanyang University
*Corresponding author.
Tel.: +82-42-860-3052, E-mail: £ºphs@kier.re.kr
Received 28 March 2018, Revised 01 January 1970, Accepted 30 March 2018, Available online 31 March 2018
http://dx.doi.org/10.11629/jpaar.2018.14.1.017
Abstracts
Since the motion of the charged particle strongly depends on its charge characteristics, information on charge
distributions of target particles is one of the important variables in aerosol research. In this study, charged distribution
of atomized NaCl particles were measured using a Gerdien type ion counter. Two kinds of particle charging conditions
were used in this study. First, atomized NaCl particles were passed through an aerosol neutralizer to have a Boltzmann
charge distribution, and then its charge distribution was measured. In this case, the portion of uncharged particles was
compared with the portion obtained from the Boltzmann charge distribution for verifying the suggested experimental
method. Second, same experiment was conducted without the aerosol neutralizer to measure the charge distribution of
atomized and un-neutralized NaCl particles. In the conclusion, the portion of uncharged, negatively charged and
positively charged particles were 19%, 62% and 20%, respectively, for neutralized particles. The atomized particles,
which was generated without the aerosol neutralizer, also had almost a zero charge state, but the standard deviation
in charge distribution was larger than that of neutralized particles. The test method proposed in this study is expected
to be used in various aerosol research fields because it can obtain simple information on the particle charge
characteristics more easily and quickly than the existing test methods.
Keywords
Aerosol particle, Charge distribution, Current measurement, Gerdien ion counter
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