Open AccessXANES analysis of sulfur form change during pyrolysis of coals
Author(s) -
Sugawara Katsuyasu,
Enda Yukio,
Sugawara Takuo,
Shirai Masayuki
Publication year - 2001
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049500020604
Subject(s) - sulfur , pyrolysis , char , chemistry , sulfide , coal , xanes , sulfoxide , nitrogen , claus process , inorganic chemistry , organic chemistry , hydrogen sulfide , spectroscopy , physics , quantum mechanics
Three kinds of coal and their density separated samples were rapidly pyrolyzed in a free‐fall reactor under a nitrogen stream at a terminal temperature of 1253 K. X‐ray absorption near edge structure analysis was applied to directly determine the sulfur forms in the coal and pyrolysis char. The results showed that the low‐density group contained sulfide and sulfoxide, which could contribute to the high extent of organic sulfur removal. Thermally stable thiophenic sulfur was observed in the higher density groups as a major form of organic sulfur.