Studies of organic sulphur in coke: sulphur-carbons formed by pyrolysis in condensed phases

✍ Scribed by H.E. Blayden; J.W. Patrick

• Publisher: Elsevier Science
• Year: 1970
• Tongue: English
• Weight: 888 KB
• Volume: 49
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/0016-2361(70)90018-9

✦ Synopsis

This paper describes part of a comprehensive study of the formation and structure of carbon-sulphur complexes, and it is directed towards providing a basis for the assessment of possibilities of controlling the organic sulphur content of coke. An account is given of the formation and behaviour of sulphur-carbons prepared by pyrolysis at temperatures between 300°C and 1100°C of (1) mixtures of organic materials with elementary sulphur and (2) organic sulphur compounds. The sulphur contents, thermal stability, chemical behaviour, e.s.r. and x-ray diffraction exhibited by the sulphur-carbons were examined. In general the pyrolytic sulphur-carbons, with the exception of carbons formed from Thiokol polymer, showed no clear differentiation from sulphur-carbons sulphurized by reaction with sulphurous gases. It is suggested that they all contain essentially similar sulphur-carbon bonds, possibly of a thioether or disulphide character, at the periphery of exposed carbon hexagon layers.