Kinetics of oxidation

The kinetics of oxidation of mild steel at high temperature are parabolic, with... 

Wet-air oxidation (also called liquid-phase thermal oxidation) is not a new technology it has been around for over forty years and has already demonstrated its great potential in wastewater treatment facilities. Despite this, there are some very important issues that remain to be addressed before a wet oxidation process can be scaled-up the kinetics of oxidation of many important hazardous compounds... 

Haynie, F. H. and Ketcham, S. J., Electrochemical Behaviour of A1 Alloys Susceptible to Intergranular Corrosion. Electrode Kinetics of Oxide-covered Al , Corrosion, 19,403t (1963) Ketcham, S. J. and Haynie, F. H., Electrochemical Behaviour of Al Alloys Susceptible to Intergranular Corrosion. Effect of Cooling Rate on Structure and Electrochemical Behaviour in 202A Al Alloy , Corrosion, 19, 242t (1963)... 

Studies of the influence of irradiation on the kinetics of oxidation have been confined to post-irradiation work. In general, prior irradiation increases reactivity, although there are considerable inconsistencies in the enhancements obtained The effects can be derived from an increased surface area associated with the swelling voids produced in the metal by the irradiation, and can also probably arise to a lesser extent from chemical effects of the fission products. 

The kinetics of oxidation over noble metals is dramatically different and much more complex. Every chemical species has an inhibiting effect on the rate of oxidation of another species. Carbon monoxide is a particularly strong self-poison, so that its oxidation kinetics usually proceeds at a negative order with respect to CO concentration. The kinetics also... 

These measurements indicate that it is not possible to identify a single value of pe surrounding the O2/H2S interface in the environment. Redox couples do not respond to the pe of the environment with the same lability as hydrogen ion donors and acceptors. There is no clear electron buffer capacity other than the most general states of "oxygen containing" or "H2S containing." The reason for the vast differences in pec in the oxic waters is the slow oxidation kinetics of the reduced forms of the redox couples. The reduced species for which the kinetics of oxidation by O2 has been most widely studied is Mn. This oxidation reaction... 

Wood and Higginson " have made a detailed study of the kinetics of oxidation of Fe(ll) by a number of complexes of Co(IIl) with ethylenediaminetetraacetic acid (H4Y = EDTA) and hydroxyethylethylenediaminetriacetic acid (H3YOH = HEDTA). Rate data and activation parameters are quoted (Table 21) for the... 

The kinetics of oxidation of propionic acid in aqueous perchloric acid by Co(III) perchlorate are ... 

The focus of our investigations of the kinetics of oxidation of Athabasca bitumen has been on the use of an aneroid calorimeter ( 1 ) for measuring rates of heat production under nearly isothermal (AT < 1.2°C in each experiment) conditions. Initial attention was given to just two of the variables that affect the kinetics of oxidation (i) temperature and (ii) pressure of oxygen. 

In conclusion, one can say that most anodic oxide films are of a duplex, or even triplex, character, with only the inner portion being composed of a pure anhydrous oxide. In the duplex films, the outer layer contains anions and often a degree of hydration. There could exist a third thin oxide layer at the surface, again with somewhat different properties, which may have a role in the kinetics of oxide growth. 

Figure 31. Correlation of the kinetics of oxide growth with kinetics of sulfate incorporation into the oxide during galvanostatic (a) and potentio-static (b) anodization of A1 in Ff2S04 solutions.166...

G.A. George, Use of chemiluminescence to study the kinetics of oxidation of solid polymers. In N. Grassie (Ed.), Developments in Polymer Degradation-3, Applied Science Publishers, London, 1981, p. 173. 

If the concentration of an initiator does not virtually change throughout the experiment, then v = const, and oxidation must occur at a constant rate. Actually, the initiation rate decreases. If the initiator is a sole source of radicals in the system, the kinetics of oxidation is described by the equation [2] ... 

The experimental values of rate constants of R02 reactions with aromatic amines (AmH) are given in Database [52], The experimental measurement of the rate constant /c7 for aromatic amines from kinetics of oxidation faced with great difficulties. These difficulties arise due to the extremely high activity of aminyl radicals toward hydroperoxide [53-56], The reaction... 

Mahoney and DaRooge [57] studied the kinetics of oxidation of 9,10-dihydroanthracene at 333 K in the presence of some phenols and estimated the ratio of rate constants ks/k2. From these ratios, the rate constants ks were calculated for several para-substituent phenols 4-YC6H4OH using 2 = 850L mol-1 s 1. 

While the rate of decomposition in air was more rapid than in nitrogen, the kinetics of oxidative decomposition cannot be estimated reliably by isothermal weight loss because ofthe possibility of competing oxidative weight gain process. For this reason the kinetics were not estimated from the available data... 

The enzymic reduction and kinetics of oxidation of cytochrome b.245 of neutrophils. Biochem. J. 204, 479-85. 

Thus taking into account the cohesion energy density allows essentially to improve upon results of correlation analysis on influence of medium properties on kinetics of oxidation of propanethiole by chlorine dioxide. At the same time a significance of this factor is indirect proof of radical stages in the process. 

As well as an important kinetic transient (see above) aqueous Ag(ll) = +2.0V) can be obtained by oxidation of Ag(I) by OH" radicals. The pA s of Ag remain controversial. The kinetics of oxidation of a variety of substrates have been discussed. ... 

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