Activated carbon fibers prepared from quinoline and isoquinoline pitches

Isao Mochida, Kay Hyeok An, Yozo Korai, Takashi Kojima, Makoto Komatsu, Masaaki Yoshikawa

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Nitrogen enriched activated carbon fibers(ACFs) were prepared from isotropic quinoline and isoquinoline pitches produced by the catalytic action of HF/BF3 through spinning, stabilization, carbonization, and oxidative activation. The pitches exhibited excellent spinnability, and the resultant fibers had mechanical properties comparable to those of commercial fibers. The surface areas and nitrogen contents of the ACFs, obtained hereby were 740-860 m2/g and 4-5.6%, respectively, at around 50 wt% of burn-off. FT-IR and XPS analyses identified the surface oxygen and nitrogen functional groups on the stabilized and activated fibers. The ACFs from isoquinoline pitch(IQP-ACF) exhibited higher basicity(1.3 meq/g) than commercial ACFs of similar surface areas(0.68 and 0.25 meq/g for PAN(FE-300) and coal tar pitch(OG-8A) based ACFs, respectively) due to a higher basic nitrogen content on the surface. The activation appears to expose basic nitrogen atoms, which were located under the surface. The basicity of ACF from quinoline pitch(QP-ACF) was much lower than that of IQP-ACF, however, QP-ACF adsorbed 74 mg/g of SO2. which was 1.4 and 2.3 times higher than that over FE-300 and OG-8A. In contrast, IQP-ACFs showed less adsorption of SO2 than that of QP-ACF and FE-300, but more than that of OG-8A. Oxidation activity of ACF surface may participate in the adsorpton of SO2 in the form of SO3 or H2SO4. The oxygen functional groups under the influence of neighboring nitrogen atoms may be the active sites for the oxidative adsorption.

Original languageEnglish
Pages (from-to)399-405
Number of pages7
JournalSekiyu Gakkaishi (Journal of the Japan Petroleum Institute)
Volume41
Issue number6
DOIs
Publication statusPublished - Jan 1 1998

Fingerprint

Activated carbon
Carbon fibers
Nitrogen
Alkalinity
Functional groups
Fibers
Chemical activation
Adsorption
Atoms
Coal tar
Oxygen
Carbonization
X ray photoelectron spectroscopy
Stabilization
Oxidation
Mechanical properties

All Science Journal Classification (ASJC) codes

  • Fuel Technology
  • Energy Engineering and Power Technology

Cite this

Activated carbon fibers prepared from quinoline and isoquinoline pitches. / Mochida, Isao; An, Kay Hyeok; Korai, Yozo; Kojima, Takashi; Komatsu, Makoto; Yoshikawa, Masaaki.

In: Sekiyu Gakkaishi (Journal of the Japan Petroleum Institute), Vol. 41, No. 6, 01.01.1998, p. 399-405.

Research output: Contribution to journalArticle

Mochida, Isao ; An, Kay Hyeok ; Korai, Yozo ; Kojima, Takashi ; Komatsu, Makoto ; Yoshikawa, Masaaki. / Activated carbon fibers prepared from quinoline and isoquinoline pitches. In: Sekiyu Gakkaishi (Journal of the Japan Petroleum Institute). 1998 ; Vol. 41, No. 6. pp. 399-405.
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abstract = "Nitrogen enriched activated carbon fibers(ACFs) were prepared from isotropic quinoline and isoquinoline pitches produced by the catalytic action of HF/BF3 through spinning, stabilization, carbonization, and oxidative activation. The pitches exhibited excellent spinnability, and the resultant fibers had mechanical properties comparable to those of commercial fibers. The surface areas and nitrogen contents of the ACFs, obtained hereby were 740-860 m2/g and 4-5.6{\%}, respectively, at around 50 wt{\%} of burn-off. FT-IR and XPS analyses identified the surface oxygen and nitrogen functional groups on the stabilized and activated fibers. The ACFs from isoquinoline pitch(IQP-ACF) exhibited higher basicity(1.3 meq/g) than commercial ACFs of similar surface areas(0.68 and 0.25 meq/g for PAN(FE-300) and coal tar pitch(OG-8A) based ACFs, respectively) due to a higher basic nitrogen content on the surface. The activation appears to expose basic nitrogen atoms, which were located under the surface. The basicity of ACF from quinoline pitch(QP-ACF) was much lower than that of IQP-ACF, however, QP-ACF adsorbed 74 mg/g of SO2. which was 1.4 and 2.3 times higher than that over FE-300 and OG-8A. In contrast, IQP-ACFs showed less adsorption of SO2 than that of QP-ACF and FE-300, but more than that of OG-8A. Oxidation activity of ACF surface may participate in the adsorpton of SO2 in the form of SO3 or H2SO4. The oxygen functional groups under the influence of neighboring nitrogen atoms may be the active sites for the oxidative adsorption.",
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