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Calcium carbonate catalysis of alcohol oxidation in near‐critical water
Author(s) -
Suppes G. J.,
Roy S.,
Ruckman J.
Publication year - 2001
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690470920
Subject(s) - catalysis , methanol , chemistry , phenol , alcohol , hydrolysis , stoichiometry , ethanol , inorganic chemistry , butanol , transition metal , nuclear chemistry , organic chemistry
The near‐critical water oxidations (NCWO) of phenol, methanol, ethanol, n‐propanol and n‐butanol were evaluated at temperatures between 200 and 374°C and pressures between 2 and 220 bar. Reactions were conducted in packed‐bed flow reactors with ZrO 2 and CaCO 3 packings with a stoichiometric amount of HOOH. The effectiveness of CaCO 3 as an oxidation catalyst increased markedly between 200 and 374°C enhancing oxidation rates > 100 × at 374°C for phenol. Hydrolysis was observed for phenol, ethanol, and methanol over CaCO 3 at 374°C and was largely nondetectable in the absence of CaCO 3 . Despite being inexpensive and environmentally benign, CaCO 3 exhibited catalytic abilities equal to or better than many of the best published performance of NCWO catalysts containing noble or transition metals.