Kinetic study of methane combustion over La0.9Ce0.1CoO3

Auer, Robert; Warnier, L.; Thyrion, F. C.

doi:10.1016/s0167-2991(01)82018-8

Cited by 7 publications

(10 citation statements)

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“…1; sequential experiments are numbered onward from 2. A competition between models S2 and S3, which have been found to be most probable according to the initial rate study, can be observed, while the probability of the other models declines rapidly. Finally, the model S2 emerges as the best.…”

Section: Resultsmentioning

confidence: 84%

“…A first discrimination among 23 rival kinetic models has been published previously, where account was taken of the influence of reactant molecule partial pressures. The present paper is devoted to the final discrimination among models retained from the preceding study by means of sequential experimental design (SED).…”

Section: Introductionmentioning

confidence: 99%

“…The absence of CO or other partial oxidation products formation over a wide range of investigated perovskites was reported. [6][7][8][9][10][11][12][13][14][15][16][17][18][19] A first discrimination among 23 rival kinetic models has been published previously, 24 where account was taken of the influence of reactant molecule partial pressures. The present paper is devoted to the final discrimination among models retained from the preceding study by means of sequential experimental design (SED).…”

Section: Introductionmentioning

confidence: 99%

“…Subcases within the groups were defined according to the mech-anism of oxygen adsorption, which could be dissociative or nondissociative, and to the stoichiometry of the ratedetermining step. An overview of the models was presented elsewhere, 24 while the corresponding rate equations were derived following the approach of the rate-controlling step of Yang and Hougan. 26 (II) Six multistep rate-controlling (MSRC) models developed for catalytic oxidation by Golodets 25 denoted by S1-S6 have also been considered (Table 3).…”

Section: Introductionmentioning

confidence: 99%

“…Preliminary Model Discrimination Study. 24 Preceding works [20][21][22][23] revealed that, among a series of perovskite-type oxides described by the general formula La 1-x Ce x Co y Mn 1-y O 3 , La 0.9 Ce 0.1 CoO 3 exhibited a fairly good activity for methane combustion and resistance to SO 2 poisoning.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Kinetics of the Total Oxidation of Methane over a La_0.9Ce_0.1CoO₃ Perovskite Catalyst

Auer

Thyrion

2002

Ind. Eng. Chem. Res.

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The kinetic study of the total oxidation of methane over a La 0.9 Ce 0.1 CoO 3 catalyst has been achieved. A discrimination among the five multistep rate-controlling models, preselected in a preceding study (Stud. Surf. Sci. Cat. 2001, 133, 599-604), was carried out on the basis of experimental data from an integral fixed-bed reactor using a sequential experimental design. According to the selected model, the overall rate is controlled by the rate of three elementary steps, i.e., (a) active surface oxygen formation, (b) the reaction between surface oxygen species and gas-phase methane, and (c) the desorption of reaction products. The kinetic constants of the model were determined using weighted regression. The experimental conversions could be predicted with an average error of lower than 5%. Both reaction products inhibit the reaction, although H 2 O causes much stronger inhibition. When the partial pressure of water in the feed is significantly higher than the one produced in the reaction, the desorption becomes an equilibrium process and the overall rate is determined only by the two elementary steps a and b.

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Section: Resultsmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%