10th International Aerosol Conference September 2 - September 7, 2018 America's Center Convention Complex St. Louis, Missouri, USA
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Investigation for the Formation of Secondary Aerosol from Passenger Vehicles by Fuel Types (Gasoline, Liquefied Petroleum Gas, and Diesel)
GYUTAE PARK, Sung-Woon Jung, Jounghwa Kim, Seok-Jun Seo, Sunmoon Kim, Kyunghoon Kim, Taekho Chung, Taehyun Park, Heekyoung Hong, Sunhee Moon, Seokwon Kang, Seung Hwan Lee, Min Seok Song, Jihee Ban, Dong-Gil Yu, Youdeog Hong, Taehyoung Lee, Hankuk University of Foreign Studies
Abstract Number: 1108 Working Group: Oxidation Flow Reactor: Development, Characterization, and Application to Aerosols
Abstract Recent research proposed that Secondary Aerosol (SA) formation in the atmosphere impacts on air pollution and health effects. However, there has been lack of studies to investigate SA formation all over the world. This study tried to focus on understanding potential mass formation between primary and secondary aerosol by chassis dynamometer for in-use vehicle. The study on potential aerosol formation from different vehicle’s fuels was conducted at the facility of Transport Pollution Research Center (TPRC), National Institute of Environmental Research (NIER), Korea. Three different types of fuels such as gasoline, liquefied petroleum gas (LPG) and diesel were tested on the FTP-75 and NEDC driving mode. An oxidation flow reactor (OFR) used in the study was the Aerodyne Potential Aerosol Mass (PAM) flow reactor. The PAM reactor is a cylindrical camber 46 cm long and 22 cm ID with a volume of approximately 13.3 liters. Two UV lamps (185 and 254 nm) are used to produce oxidants (O3, OH, and HO2) in the PAM (referred to as the OFR-185 method), or OH production from photolysis of injected (externally produced) O3 using 254 nm UV lamp (referred to as the OFR-254 method). In this study, OFR-254 method was operated with a residence time in the range of 1-2 min. During the study, relative humidity (RH) and temperature were under 25% and 30℃. Chemical composition of aerosol from vehicle emission and through PAM was measured by the High Resolution-Time of Flight-Aerosol Mass Spectrometer (HR-ToF-AMS). The HR-ToF-AMS provides non-refractory aerosol mass concentrations including nitrate, sulfate, hydrocarbon-like and oxygenated organic aerosol in real time.
Acknowledgment : Funded by the National Institute of Environmental Research (NIER), Korea. Additional data processing and analysis was supported by Korea Ministry of Environment as "Climate Change Correspondence Program".