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Received January 22, 2010
Accepted May 14, 2010
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Development of a fast-response, high-resolution electrical mobility spectrometer
College of Integrated Science and Technology, Rajamangala University of Technology Lanna, Chiang Mai 50300, Thailand 1Department of Mechanical Engineering, Chiang Mai University, Chiang Mai 50200, Thailand
Korean Journal of Chemical Engineering, January 2011, 28(1), 279-286(8), 10.1007/s11814-010-0326-0
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Abstract
A short electrical mobility spectrometer (EMS) for measuring aerosol size distribution has been developed and presented [Intra and Tippayawong, Korean J. Chem. Eng., 26, 1770, 2009]. In this work, further improvement of the short EMS into a fast-response, and high resolution instrument is presented. This was done by (i) improvement in particle charging, (ii) utilization of faster flow rate, and (iii) adoption of higher number of electrode rings. The so-called “long” EMS consists of three main parts: a particle charger, a long multi-channel size classifier column, and a multichannel electrometer. Performance of the long EMS was preliminarily tested using polydisperse, carbonaceous aerosol particles generated by a diffusion flame. Preliminary test results showed that the long EMS performed comparatively well, and gave faster response and higher resolution than the short EMS. It was a valuable aerosol instrument available for measuring size distribution of aerosol particles.
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Intra P, Tippayawong N, Korean J. Chem. Eng., 26(6), 1770 (2009)
Graskow BR, Design and development of a fast aerosol size spectrometer, Ph.D. Thesis, University of Cambridge, UK (2001)
Intra P, Tippayawong N, J. Electrostat., 67, 605 (2009)
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Intra P, Tippayawong N, J. Aerosol Res., 21, 329 (2006)
Yawootti A, Intra P and Tippayawong N, 32nd Electrical Engineering Conference, Prachinburi, Thailand, 28-30 October (2009)
National Semiconductor Corporation, LMC662 Data Sheet (2003)
