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CARBONLETT, vol. 26, no. 1, pp.74-80, 2018

DOI: DOI: http://dx.doi.org/10.5714/CL.2018.26.074

Carbon dioxide (CO2) concentrations and activated carbon fiber filters in passenger vehicles in urban areas of Jeonju, Korea

Hong Gun Kim1, Yunhua Yu2, Xiaoping Yang2, and Seung Kon Ryu1,♠

Affiliation: 1Institute of Carbon Technology, Jeonju University, Jeonju 55069, Korea
2State Key Laboratory of Organic-Inorganic Composites, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China

Abstract: The South Korean Ministry of the Environment has revised the laws relating to the management of interior air quality for multiple use facilities, and recommends maintaining carbon dioxide (CO2) concentration in passenger vehicles below 1000 ppm during operation in urban areas of large cities. However, the interior CO2 concentration of passenger vehicles can rapidly increase and exceed 5000 ppm within 30 min, as observed when two passengers are traveling in urban areas of the South Korean city of Jeonju with the air conditioner blower turned off and the actuator mode set to internal circulation mode. With four passengers, CO2 concentration can reach up to 6000 ppm within 10 min. To counter this, when the actuator is set to external mode, CO2 concentration can be maintained below 1000 ppm, even after a long period of running time. As part of the air conditioning system, alkali-treated activated carbon fiber filters are considered to be far superior to the commercial non-woven filters or combination filters currently commonly in use.

Keyword: carbon dioxide, passenger vehicle, air cleaning filter, activated carbon filter