Facile microwave treatment of activated carbons and its effects on hydrocarbon adsorption/desorption behaviors

서지정보

ㆍ발행기관 : 한국탄소학회 ㆍ수록지정보 : Carbon letters / 33권 / 4호
ㆍ저자명 : Jin‑Young Lee, Hye‑Min Lee, Byung‑Joo Kim

목차

Facile microwave treatment of activated carbons and its effects on hydrocarbon adsorptiondesorption behaviors
Abstract
1 Introduction
2 Experimental
2.1 Materials and microwave heating
2.2 Characterization
2.3 Butane working capacity
3 Results and discussion
3.1 Fourier-transform infrared spectroscopy
3.2 X-ray photoelectron spectroscopy
3.3 Scanning electron microscope and energy-dispersive X-ray spectroscopy
3.4 N277K adsorption–desorption isotherm and textural properties
3.5 Butane working capacity
4 Conclusions
Anchor 15
References

영어 초록

Evaporative emission generated through the fuel supply system of a gasoline automobile is prevented into the atmosphere through an activated carbon canister system. In this study, the oxygen functional group of activated carbon was controlled using a simple gas phase treatment to improve evaporative emission reduction performance, and the adsorption/desorption performance of evaporative emissions was evaluated according to microwave heating conditions. Microwave heating was used to remove the oxygen functional group of the activated carbon efficiently. Microwave heating was found to remove oxygen functional groups in a short treatment time (1–7 min). Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, and scanning electron microscope–energy-dispersive X-ray spectroscopy were employed to investigate modifying the oxygen functional group of the activated carbon. Using N2/ 77K adsorption/desorption isotherm, the textural properties of the activated carbon according to microwave heating conditions were examined. The Brunauer–Emmett–Teller (BET) equation was used to calculate the specific surface area of the activated carbon, and the Dubinin–Radushkevich (DR) equation was used to calculate the micropore volume of activated carbon. Microwave heating effectively increased the butane working capacity, which is the neat adsorption capacity of activated carbon, from 7.12 g/100 ml to a maximum of 8.04 g/100 ml.

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