Enhanced wet air oxidation: Synergistic rate acceleration upon effluent recirculation

Journal Article · Sat Jan 01 04:00:00 EST 2000 · Industrial and Engineering Chemistry Research

DOI:https://doi.org/10.1021/ie990149n· OSTI ID:20014510

Birchmeier, M J; Hill, Jr, C G; Houtman, C J; Atalla, R H; Weinstock, I A

Wet air oxidation (WAO) reactions of cellobiose, phenol, and syringic acid were carried out under mild conditions (155 C; 0.93 MPa O{sub 2}; soluble catalyst, Na{sub 5}[PV{sub 2}Mo{sub 10}O{sub 40}]). 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 with unreacted 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.

• Research Organization: Univ. of Wisconsin, Madison, WI (US)
• Sponsoring Organization: US Department of Energy; US Department of Agriculture
• DOE Contract Number: FC36-95GO10090
• OSTI ID: 20014510
• Journal Information: Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 1 Vol. 39; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
54 ENVIRONMENTAL SCIENCES
CELLOBIOSE
CHEMICAL REACTION KINETICS
ORGANIC ACIDS
PHENOL
RECYCLING
WASTE WATER
WATER TREATMENT
WET OXIDATION PROCESSES