On the importance of by-products in the kinetics of n-butane oxidation to maleic anhydride

Müller, Mauritio; Kutscherauer, Martin; Böcklein, Sebastian; Mestl, Gerhard; Turek, Thomas

doi:10.1016/j.cej.2020.126016

Cited by 18 publications

(40 citation statements)

References 40 publications

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“…The kinetics have been the subject of numerous studies in the last decades, resulting in a high number of approaches with different complexities. A comparison with the experimental results obtained previously reveals that some of these models can describe the conversion and selectivity to MA quite well. However, the formation of CO and CO 2 could not be described with the desired degree of detail.…”

Section: Introductionsupporting

confidence: 54%

“…A substantial advantage of this reactor is its almost isothermal behavior, which allows kinetic measurements without disruptive influences through heat transport limitations. Further details on the reactor and its periphery, as well as the procedure of the experiments, have been described elsewhere. , …”

Section: Methodsmentioning

confidence: 99%

“…For MA and the intermediate products acetic and acrylic acid, both their influence on n -butane oxidation kinetics and their (concerted) oxidation were investigated. Detailed information on all experiments, together with a qualitative analysis, has already been described in a previous publication …”

Section: Methodsmentioning

confidence: 99%

“…Most of the available kinetics do not distinguish between CO and CO 2 (e.g., , ) or assume a fixed CO/CO 2 ratio (e.g.,). Even the models that differentiate between CO and CO 2 (e.g., , ) do not allow a sufficient description of CO/CO 2 formation, which strongly depends on the operating conditions …”

Section: Introductionmentioning

confidence: 99%

“…The aim of the following article is to develop rate equations that can precisely describe not only the conversion and selectivity to MA but also the selectivities to CO and CO 2 . For this purpose, experiments are used, which have already been qualitatively evaluated in an earlier publication . The objective is to be able to reproduce as many of the observed influences on conversion and selectivities as possible without obtaining a model of excessive complexity.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Improved Kinetics ofn-Butane Oxidation to Maleic Anhydride: The Role of Byproducts

Müller

Kutscherauer

Böcklein

et al. 2020

Ind. Eng. Chem. Res.

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Detailed modeling of the oxidation of n-butane to maleic anhydride can help improve the process knowledge and facilitate the development of optimization strategies. Unfortunately, none of the kinetics published in the literature can satisfactorily describe the formation of the most important byproducts: CO and CO2. Based on qualitative findings, we derived different kinetic approaches (Eley–Rideal, Langmuir–Hinshelwood, and Mars and van Krevelen). With a mathematical model of the used millistructured fixed-bed laboratory reactor, these were adapted to the experimental results over a wide range of industrially relevant operating conditions. A comparison of the results suggests that the kinetics can be best described with a redox approach, according to Mars and van Krevelen, derived under the assumption of three different active sites. In this context, the aforementioned description of CO/CO2 formation can be significantly improved, even with a simplified reaction network. The key is to include information on the role of the usually neglected byproducts acetic and acrylic acid.

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Section: Introductionsupporting

confidence: 54%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%