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In situ fiber‐optic Raman spectroscopy of organic chemistry in a supercritical water reactor
Author(s) -
Myrick M. L.,
Kolis J.,
Parsons E.,
Chike K.,
Lovelace M.,
Scrivens W.,
Holliday R.,
Williams M.
Publication year - 1994
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250250109
Subject(s) - supercritical fluid , cyclohexene , cyclohexane , raman spectroscopy , cyclohexanol , styrene , catalysis , chemistry , benzene , platinum , photochemistry , analytical chemistry (journal) , inorganic chemistry , organic chemistry , optics , copolymer , physics , polymer
In situ measurements were made of several organic chemical reactions in supercritical water using fiber‐optic probes, near‐infrared excitation and CCD array detection. The reactions studied include the conversion of cyclohexene to cyclohexane and benzene in the presence of a platinum catalyst, conversion of cyclohexanol to cyclohexene in the presence of a cobalt catalyst and the homopolymerization of styrene. Transition to the supercritical state was marked by a sudden decrease in the background and the appearance of intense Raman bands for dissolved organic compounds. The results indicate that this method of study is both sensitive and rapid enough to permit kinetic measurements, even when reactions are completed in less than 2 min.