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Heat-treatment of carbon blacks obtained by pyrolysis of used tires. Effect on the surface chemistry, porosity and electrical conductivity

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Abstract.
Truck tire particles were pyrolysed at 490 °C at atmospheric pressure and under vacuum,
respectively. The recovered pyrolytic carbon black (CBP) was heated in a post-pyrolysis
process at temperatures ranging from 670 to 860 °C. The CBP were studied in comparison
to a commercial tire carbon black by low-pressure nitrogen adsorption and surface spectroscopic
methods (ESCA and SIMS). Furthermore, the CBP properties were correlated to their
electrical conductivities. During tire pyrolysis, carbonaceous deposits are formed on the CBP
surface and between the carbon black particles. These deposits have a lower polyaromatic
character as compared with the surface of the commercial carbon black. Therefore, the
electrical conductivity of CBP is lower as compared with commercial blacks. Fewer deposits
are formed during vacuum pyrolysis as compared with atmospheric pyrolysis. Upon heating,
a portion of the deposits is desorbed and the polyaromatic character of the CBP surface
increases. The CBP conductivity increases as well, in the case of vacuum pyrolysis CBP, to
values higher than commercial blacks.

Keywords: Carbon black; Pyrolysis; Electrical conductivity; ESCA; SIMS; Nitrogen adsorption

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Ketersediaan

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Informasi Detail

Judul Seri

Journal of Analytical and Applied Pyrolysis

No. Panggil

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Penerbit

New York : Elsevier Science B.V.., 2003

Deskripsi Fisik

Journal of Analytical and Applied Pyrolysis 67 (2003) 55–76

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

67 (2003)

Subjek

KIMIA KARBON

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

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