Effect of potassium permanganate pretreatment of pitch on the textural properties of pitch-based activated

서지정보

· 발행기관 : 한국탄소학회
· 수록지 정보 : Carbon Letters / 12권 / 3호
· 저자명 : Dae-WonKim, Soo-JinPark

목차

1. Introduction
2. Experimental
3. Results and Discussion
4. Conclusions
Acknowledgments
References

초록

Petroleum pitch-based activated carbons (ACs) were obtained in this work from a combination
of pretreatment with different amounts of potassium permanganate (KMnO4) and
chemical activation with potassium hydroxide. The surface characteristics of the pitch after
the KMnO4 pretreatment were characterized by means of Fourier transform infrared spectroscopy
(FT-IR). The structural characteristics of the pitch after the KMnO4 pretreatment
were determined by means of X-ray diffraction. The influence of the KMnO4 treatment on
the textural properties of the petroleum pitch-based ACs was investigated by means of N2/77
K adsorption isotherms. The investigation also involved the use of the Brunauer-Emmett-
Teller equation and the Dubinin-Radushkevich method. The FT-IR results show that the
pretreatment promotes the formation of surface oxygen functionalities and leads to an increase
of the interplanar distance (d002) of the functional groups induced between carbon
layers. Moreover, the specific surface area of the pitch-based ACs increases in proportion to
the amount of KMnO4 pretreatment and reaches its highest value of 2334 m2/g with 2 g of
KMnO4 because the surface oxygen groups of the pitch act as an active site during chemical
activation.

영어초록

Petroleum pitch-based activated carbons (ACs) were obtained in this work from a combinationof pretreatment with different amounts of potassium permanganate (KMnO4) andchemical activation with potassium hydroxide. The surface characteristics of the pitch afterthe KMnO4 pretreatment were characterized by means of Fourier transform infrared spectroscopy(FT-IR). The structural characteristics of the pitch after the KMnO4 pretreatmentwere determined by means of X-ray diffraction. The influence of the KMnO4 treatment onthe textural properties of the petroleum pitch-based ACs was investigated by means of N2/77K adsorption isotherms. The investigation also involved the use of the Brunauer-Emmett-Teller equation and the Dubinin-Radushkevich method. The FT-IR results show that thepretreatment promotes the formation of surface oxygen functionalities and leads to an increaseof the interplanar distance (d002) of the functional groups induced between carbonlayers. Moreover, the specific surface area of the pitch-based ACs increases in proportion tothe amount of KMnO4 pretreatment and reaches its highest value of 2334 m2/g with 2 g ofKMnO4 because the surface oxygen groups of the pitch act as an active site during chemicalactivation.

참고자료

· 없음