Oxidation Arrhenius plots

Figure A3.10.25 Arrhenius plots of CO oxidation by O2 over Rli single crystals and supported Rli/Al203 at PCO = PO2 = 0.01 atm [43]. The dashed line in the figure is the predicted behaviour based on the rate constants for CO and O2 adsorption and desorption on Rli under UHV conditions.

Fig. 7.1 Arrhenius plot for the oxidation of mild steel and low-alloy steels in air showing a sharp break it the slope at d curvature due to the appearance of FeO in the scale above...

Above 570°C, a distinct break occurs in the Arrhenius plot for iron, corresponding to the appearance of FeO in the scale. The Arrhenius plot is then non-linear at higher temperatures. This curvature is due to the wide stoichiometry limits of FeO limits which diverge progressively with increasing temperature. Diffraction studies have shown that complex clusters of vacancies exist in Fe, , 0 Such defect clustering is more prevalent in oxides... 

Fig. 7.35 Arrhenius plot of the parabolic rate constant for the oxidation of Ni to NiO (after...

Fig. 2. Arrhenius plots for the rate of CO oxidation over ( ) 02-treated Au/Nano-Ti02, (A) 03/02-treated Au/Nano-Ti02 and (O) 03/02-treated Au/P25.

Ferricyanide catalyses the decomposition of H2O2 at pH 6-8. The reaction is first-order in peroxide but the dependence on oxidant concentration is complex . The Arrhenius plots were curved but averaged values indicated that at pH 7 and 8, respectively, E is 25+2 and 11 + 1.5 kcal.mole". Clearly several processes are contributing to the overall reaction. 

Figure 2. Arrhenius plots of differential rates of NO reduction ( ) and of CH4 oxidation (o) during the SCR reaction, and for CH4oxidation by Oj alone (A) over CoZSM-5 (A) and HZSM-5 (B) catalysts. Feed contained 0.28% CH4, 0.21 % NO (when used) and 2.6% O2 in He.

Figure 3.36 Arrhenius plot for the oxidative dehydrogenation of methanol to formaldehyde performed in a micro reactor [72].

FIGURE 25.5 Arrhenius plots of some oxide ion conductors. (Courtesy of Prof. Tatsumi Ishihara, Kyushu University, Japan.)... 

Figure 8. Rate of carbon monoxide oxidation on calcined Pt cube monolayer as a function of temperature [27]. The square root of the SFG intensity as a function of time was fit with a first-order decay function to determine the rate of CO oxidation. Inset is an Arrhenius plot for the determination of the apparent activation energy by both SFG and gas chromatography. Reaction conditions were preadsorbed and 76 Torr O2 (flowing). (Reprinted from Ref. [27], 2006, with permission from American Chemical Society.)...

Figure 7 Arrhenius plots for non-isothermal chemiluminescence runs of oxidized polymers, (1) polypropylene, (2) polyethylene, in oxygen, heating rate 2.5°C/min. 

FIGURE 3.10 Arrhenius plot of the Semenov steps in hydrocarbon oxidation. Points 1-4 correspond to the same points as in Fig. 3.9. 

Figure 2. CO oxidation catalysis by Au/Ti02 for various pretreatments. (A) rate vs. temperature plots and (B) Arrhenius plots.

Catalyst Aiowox was substantially more reactive than catalysts prepared with shorter, high temperature treatments (rates were roughly 6 times faster with the Aiowox pretreatment at about 80 C). Although the Au/Ti02 catalysts prepared from DENs are more active than the supported Ft catalysts we have previously examined,(6) they are not as active as the best literature reports for CO oxidation by supported Au catalysts prepared by other means. Arrhenius plots using rate data between 2 and 12% conversion for the Au/Ti02 catalysts activated with these three... 

Fig. 30. Arrhenius plots for the rate of oxidation in air of both unirradiated and previously irradiated spectroscopic graphite. [After W. L. Kosiba, and G. J. Dienes, Advances in Catalysis 9, 398 (1957).]...

Fig. 9. Arrhenius plots of the oxidation of propylene over various multicomponent bismuth molybdate catalysts.

Fig. 1. Arrhenius plots for hydrogenation rate of ethylene over nickel on doped zinc oxide.

Figure 14.22 Arrhenius plot for amide growth in the oxidation of amine crosslinked epoxy films.

Fig. 4.25 Arrhenius plot of methane oxidation at a platinum surface.

Fig. 9. Reduced Arrhenius plots (k/ko against 1/T) of NiO and NiO/Ag. Comparison of measured activation energies of CO oxidation (top) with the conductivity of NiO (centre) and the Arrhenius plot obtained by impurity level analysis (bottom). Solid lines, dark dotted lines, light dash-dotted, conductivity...

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