Modelling of carbon and hydrogen oxidation kinetics of a coked ferrierite catalyst

Keskitalo, Tuomo; Lipiäinen, K.; Krause, A.O.I.

doi:10.1016/j.cej.2006.03.033

Cited by 12 publications

(11 citation statements)

References 13 publications

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“…The weight loss during the TPO experiments is usually simulated with different kinds of models, but the simplest power-law kinetic models are generally used. − Moreover, Querini et al first explain the possibility of obtaining accurate fitting of experimental TPO profiles by their deconvolution with a linear combination of power-law expressions. According to our previous results, three different coke fractions can be defined for describing the carbonaceous species deposited during DTO reactions.…”

Section: Methodsmentioning

confidence: 99%

Insight into the Deactivation and Regeneration of HZSM-5 Zeolite Catalysts in the Conversion of Dimethyl Ether to Olefins

Cordero-Lanzac

Ateka

Pérez-Uriarte

et al. 2018

Ind. Eng. Chem. Res.

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The impact of different process variables affecting the coking and rejuvenation of HZSM-5 zeolite catalyst has been studied during the conversion of dimethyl ether (DME) to olefins in a fixed bed reactor. Those variables involve the effect of (i) the matrix material with mesopores; (ii) temperature; (iii) space time; (iv) acidity of the catalyst; (v) steam, inert or air in the reaction-regeneration medium. Used catalysts have been characterized through N2 adsorption-desorption and temperature-programmed oxidation, and the presence of three coke fractions has been identified, deposited within the zeolite micropores, the external surface of the crystals and the mesopores of the matrix. Low Si/Al ratios (140) and temperatures (350 °C), and cofeeding water with DME, reduce the formation of coke within the zeolite micropores, favoring the stability of the catalyst. Reaction-regeneration cycles confirm that catalysts totally recover the activity through combustion of coke during a heating ramp up to 550 °C.

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Section: Methodsmentioning

confidence: 99%

Insight into the Deactivation and Regeneration of HZSM-5 Zeolite Catalysts in the Conversion of Dimethyl Ether to Olefins

Cordero-Lanzac

Ateka

Pérez-Uriarte

et al. 2018

Ind. Eng. Chem. Res.

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“…In the literature several papers have been published on the combustion of carbonaceous materials that mention this kind of model [19][20][21][22][23][24][25][26][27][28][29]. It is well known that the system under study is very complex, which is due to different phenomena that occur on the gas-solid (gas-soot and gas-catalyst) and solid-solid (catalyst-soot) interfaces.…”

Section: Kinetic Modelmentioning

confidence: 99%

“…Elemental analysis of soot [17][18][19][20][21][22][23][24][25][26][27][28][29][30] indicates that carbon is the main component, and therefore the stoichiometry proposed for the global reaction is:…”

Section: Kinetic Modelmentioning

confidence: 99%

Catalytic combustion of diesel soot: Experimental design for laboratory testing

Peralta

Gross

Sánchez

et al. 2009

Chemical Engineering Journal

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“…Therefore, prior to the kinetic analysis, it is necessary to cut down the impact of the transfer process on the experiments results. In general, catalysts with a small mean diameter are used for the regeneration kinetics study. , We evaluated the influence of external diffusion of oxygen by reducing the mass loading of the coked catalyst from 15 to 5 mg while keeping the heating rate and the air flow rate the same. The highly consistent combustion rate of coke with these two mass loadings suggests that the external diffusion of oxygen has a minor influence in this study.…”

Section: Resultsmentioning

confidence: 99%

Kinetic Study on Air Regeneration of Industrial Methanol-to-Olefin Catalyst

Zhao

Zhou

et al. 2020

Ind. Eng. Chem. Res.

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The regeneration kinetics of coke on an industrial methanol-to-olefin (MTO) catalyst was studied via thermogravimetric analysis under the air atmosphere. To minimize the uncertainty of the kinetic parameters, four model-free methods were employed to calculate the regeneration activation energy. It was found that the activation energies obtained by all methods are quite consistent for any given coke conversion. An average activation energy of 141.1 kJ/mol was obtained for combustion of coke on the industrial MTO catalyst. The master-plot method was then employed to decide the regeneration model function. It showed that the combustion process of coke on the industrial MTO catalyst may be depicted using the Fn model. A comparison between the model prediction and additional experimental results demonstrated that the regeneration kinetics model built in this work can work very well under operation conditions of industrial interest and favor the optimization and design of a regenerator in an industrial MTO unit.

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Modelling of carbon and hydrogen oxidation kinetics of a coked ferrierite catalyst

Cited by 12 publications

References 13 publications

Insight into the Deactivation and Regeneration of HZSM-5 Zeolite Catalysts in the Conversion of Dimethyl Ether to Olefins

Insight into the Deactivation and Regeneration of HZSM-5 Zeolite Catalysts in the Conversion of Dimethyl Ether to Olefins

Catalytic combustion of diesel soot: Experimental design for laboratory testing

Kinetic Study on Air Regeneration of Industrial Methanol-to-Olefin Catalyst

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