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Mechanisms and kinetics of thermal reactions of aromatic hydrocarbons from pyrolysis of solid fuels

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Jess, Andreas:
Mechanisms and kinetics of thermal reactions of aromatic hydrocarbons from pyrolysis of solid fuels.
In: Fuel. Bd. 75 (1996) Heft 12 . - S. 1441-1448.
ISSN 1873-7153
DOI: https://doi.org/10.1016/0016-2361(96)00136-6

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Abstract

The kinetics of the thermal conversion of aromatic hydrocarbons in the presence of hydrogen and steam were studied, using anphthalene, toluene and benzene as model compounds. The experiments were performed in a tubular flow reactor at a total pressure of 160 KPa, temperatures of 700–1400°C, residence times of 0.3–2 s and different gas-phase concentrations of hydrogen, steam and the aromatics. The mechanisms of primary and consecutive reactions are presented as reaction schemes that are supported by kinetic calculations. The following order of reactivity is obtained: toluene ⪢ naphthalene > benzene. Besides gaseous organic cracking products such as methane and ethene, condensed products and a carbonaceous residue (soot) is formed, principally from naphthalene. Soot formation is strongly inhibited by hydrogen. Steam has only a little influence on the conversion of the aromatics. Under the given reaction conditions, neither the soot primarily formed nor the organic cracking products such as methane are completely converted by steam to carbon monoxide and hydrogen, even at the highest temperature investigated (1400°C).

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Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Keywords: Aromatic Hydrocarbons; Pyrolysis; Kinetics
Institutionen der Universität: Fakultäten > Fakultät für Ingenieurwissenschaften
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Chemische Verfahrenstechnik
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Chemische Verfahrenstechnik > Lehrstuhl Chemische Verfahrenstechnik - Univ.-Prof. Dr.-Ing. Andreas Jess
Fakultäten
Titel an der UBT entstanden: Nein
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 540 Chemie
600 Technik, Medizin, angewandte Wissenschaften > 600 Technik
600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
600 Technik, Medizin, angewandte Wissenschaften > 660 Chemische Verfahrenstechnik
Eingestellt am: 05 Mai 2015 09:00
Letzte Änderung: 08 Mai 2015 11:09
URI: https://eref.uni-bayreuth.de/id/eprint/11759