Kinetics of the chromium(VI)/thiourea reaction in the presence of polyacrylamide
The formation of chromium(III)-polyacrylamide gels was followed kinetically using spectrophotometric methods. The rate of chromium(VI) species conversion by thiourea and bisulfite was monitored to find a kinetic model for the oxidation/reduction reaction. The third order model found here shows first-order dependence on chromium(VI) concentration on thiourea and on pH. Additional results of the thiourea study show that a constant amount of chromium(VI) is consumed at gelation regardless of the initial concentration of that species, indicating that the Cr(VI) reduction reaction may be the rate-determining step in gelation. No such model or constant conversion for the bisulfite-reduced reaction could be determined.
- Research Organization:
- Univ. of Kansas
- OSTI ID:
- 6640128
- Report Number(s):
- CONF-8304162-
- Journal Information:
- Soc. Pet. Eng. AIME, Pap.; (United States), Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Vol. SPE/DOE 12715; ISSN SEAPA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
ANTITHYROID DRUGS
BENCH-SCALE EXPERIMENTS
CARBONIC ACID DERIVATIVES
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHROMIUM COMPOUNDS
COLLOIDS
DISPERSIONS
DISPLACEMENT FLUIDS
DRUGS
FLUID INJECTION
FLUIDS
GELATION
GELS
HORMONE ANTAGONISTS
KINETICS
MICROEMULSION FLOODING
MISCIBLE-PHASE DISPLACEMENT
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
ORGANIC SULFUR COMPOUNDS
OXIDATION
PH VALUE
POLYAMIDES
POLYMERS
REACTION KINETICS
REDUCTION
THIOUREA
THIOUREAS
TRANSITION ELEMENT COMPOUNDS
WELLS