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Title: Enhanced wet air oxidation : synergistic rate acceleration upon effluent recirculation

Author: Birchmeier, Matthew J.; Hill, Charles G.; Houtman, Carl J.; Atalla, Rajai H.; Weinstock, Ira A.

Date: 2000

Source: Industrial engineering and chemistry research. Vol. 39 (2000): Pages 55-64

Publication Series: Miscellaneous Publication

Description: Wet air oxidation (WAO) reactions of cellobiose, phenol, and syringic acid were carried out under mild conditions (155°C; 0.93MPa 02; soluble catalyst, Na5[PV2Mo10O40]). Initial oxidation rates were rapid but decreased to small values as less reactive oxidation products accumulated. Recalcitrant oxidation products were consumed more rapidly, however, if additional cellobiose or phenol was added, a procedure equivalent to recirculation of WAO-reactor effluent. A half-fraction, factorial investigation was used to correlate rate enhancement with individual experimental variables: using a two-level design, effluents from the WAO of cellobiose were combined withunreacted cellobiose and WAO resumed. The effluents were degraded more rapidly than could be accounted for by residence time alone. Correlations identified by the factorial investigation were consistent with oxidation of recalcitrant compounds by highly reactive intermediates generated during the initially rapid radical-chain autoxidation of unreacted cellobiose.

Keywords: Wet air oxidation, WAO, synergistic rate acceleration, recirculation, effluent, oxidation

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Birchmeier, Matthew J.; Hill, Charles G.; Houtman, Carl J.; Atalla, Rajai H.; Weinstock, Ira A. 2000. Enhanced wet air oxidation : synergistic rate acceleration upon effluent recirculation. Industrial engineering and chemistry research. Vol. 39 (2000): Pages 55-64

 


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