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Open AccessArticle

Pitch-Derived Activated Carbon Fibers for Emission Control of Low-Concentration Hydrocarbon

1
Research Center for Carbon Convergence Materials, Korea Institute of Carbon Convergence Technology, Jeonju 54852, Korea
2
Department of Chemistry, Inha University, Incheon 22212, Korea
3
Department of Chemical Engineering, Chonbuk National University, Jeonju 54896, Korea
4
Department of Nano & Advanced Materials Engineering, Jeonju University, Jeonju 55069, Korea
*
Authors to whom correspondence should be addressed.
Nanomaterials 2019, 9(9), 1313; https://doi.org/10.3390/nano9091313
Received: 19 August 2019 / Revised: 3 September 2019 / Accepted: 11 September 2019 / Published: 14 September 2019
(This article belongs to the Special Issue Nanotechnology for Environmental and Biomedical Research)
The unburned hydrocarbon (HC) emissions of automobiles are subject to strong regulations because they are known to be converted into fine dust, ozone, and photochemical smog. Pitch-based activated carbon fibers (ACF) prepared by steam activation can be a good solution for HC removal. The structural characteristics of ACF were observed using X-ray diffraction. The pore characteristics were investigated using N2/77K adsorption isotherms. The butane working capacity (BWC) was determined according to ASTM D5228. From the results, the specific surface area and total pore volume of the ACF were determined to be 840–2630 m2/g and 0.33–1.34 cm3/g, respectively. The butane activity and butane retentivity of the ACF increased with increasing activation time and were observed to range between 15.78–57.33% and 4.19–11.47%, respectively. This indicates that n-butane adsorption capacity could be a function not only of the specific surface area or total pore volume but also of the sub-mesopore volume fraction in the range of 2.0–2.5 nm of adsorbents. The ACF exhibit enhanced BWC, and especially adsorption velocity, compared to commercial products (granules and pellets), with lower concentrations of n-butane due to a uniformly well-developed pore structure open directly to the outer surface. View Full-Text
Keywords: pitch; activated carbon fiber; evaporated fuel; hydrocarbon emissions pitch; activated carbon fiber; evaporated fuel; hydrocarbon emissions
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MDPI and ACS Style

Lee, H.-M.; Lee, B.-H.; Park, S.-J.; An, K.-H.; Kim, B.-J. Pitch-Derived Activated Carbon Fibers for Emission Control of Low-Concentration Hydrocarbon. Nanomaterials 2019, 9, 1313.

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