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A shock tube study of pyrolysis of tetrahydrothiophene at elevated temperatures
Author(s) -
Memon Hafeez Ur Rahman,
Williams Alan,
Williams Paul T.
Publication year - 2004
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.986
Subject(s) - tetrahydrothiophene , pyrolysis , chemistry , thiophene , hydrocarbon , sulfur , analytical chemistry (journal) , yield (engineering) , gas chromatography , hydrogen , organic chemistry , materials science , chromatography , metallurgy
A single pulse shock tube has been used to study the pyrolysis of a hydrogenated sulphur compound, tetrahydrothiophene over the temperature range 1686–1885 K and pressures between 2.4 and 3.5 bars. Product yield and composition was determined using capillary column gas‐chromatography with flame ionization detection and flame photometric sulphur selective detection. The principal hydrocarbon products at all temperatures were C 2 H 4 and C 2 H 2 . Other hydrocarbon reaction products were CH 4 , C 2 H 6 , C 3 H 4 , C 3 H 6 , C 4 H 3 , C 4 H 6 , C 4 H 10 , C 4 H 4 , C 6 H 6 , C 4 H 2 and some traces of C 5 and C 6 H 5 species. The sulphur compounds identified were hydrogen sulphide, carbon disulphide, thiophene and traces of ethyl mercapton. The pyrolysis experiments indicated that at lower temperatures the hydrogenated thiophene molecule reacts in two unimolecular channels to form C 2 H 4 +(CH 2 )2–S in the major faster channel which may be the route for other products. However, a second lower route may be the formation of C 3 H 6 +CH 2 S. The rate constant obtained for tetrahydrothiophene pyrolysis calculated for this study was k dis(C4H8S) =1.26×10 13 exp (316.9 kJ mol −1 ) s −1 . Copyright © 2004 John Wiley & Sons, Ltd.