Catalysis in Multifunctional Reactors

Mahajani, Sanjay M.; Saha, Basudeb

doi:10.1515/psr-2015-0014

Cited by 2 publications

(2 citation statements)

References 146 publications

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“…In addition, heterogeneous catalysts include a wide range of materials (such as ion exchange resins, zeolites, metal oxides, supported metals, and others) and are the basis for process intensification with multifunctional reactors [2]. Reactive distillation, reactive stripping, and chromatographic reactors are examples of such processes where ion exchange resins find frequent applications [3].…”

Section: Introductionmentioning

confidence: 99%

Revisiting Isothermal Effectiveness Factor Equations for Reversible Reactions

et al. 2023

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Ion exchange resins have many industrial applications, namely as sorbents and catalysts. In solid-catalyzed reactions, intraparticle reaction-diffusion competition is generally described by effectiveness factors calculated numerically or analytically in the case of isothermal particles and simple rate laws. Although robust, numerical calculations can be time-consuming, and convergence is not always guaranteed and lacks the flexibility of user-friendly equations. In this work, analytical equations for effectiveness factors of reversible reactions derived from the general scheme A+B⇌C+D are developed and numerically validated. These effectiveness factors are analytically expressed in terms of an irreversible nth order Thiele modulus (specifically written for the nth order forward reaction), the thermodynamic equilibrium constant, the ratios of effective diffusivities, and the ratios of surface concentrations. The application of such analytical equations is illustrated for two liquid phase reactions catalyzed by Amberlyst-15, specifically the synthesis of ethyl acetate and acetaldehyde dimethyl acetal. For both reactions, the prediction of the concentration profiles in isothermal batch reactors achieved errors between 1.13% and 3.38% for six distinct experimental conditions. Finally, the impact of non-ideal behavior upon the multicomponent effective diffusivities, subsequently conveyed to the effectiveness factors, is enlightened.

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Section: Introductionmentioning

confidence: 99%

Revisiting Isothermal Effectiveness Factor Equations for Reversible Reactions

et al. 2023

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“…A major approach to improve the efficiency of chemical processes is the integration of reaction and separation operations [1]. The most frequent motivations for this are that continuous or periodic removal of products from the reaction locus and/or recycling of unused reactants may increase the conversion for equilibrium limited reversible reactions and improve selectivity and yield for multistep reaction systems [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Analysis of reactor–separator processes for polymeric and oligomeric degradation products with controlled molar mass distributions

Sainio

Kaspereit

2021

Chemical Engineering Science

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Catalysis in Multifunctional Reactors

Cited by 2 publications

References 146 publications

Revisiting Isothermal Effectiveness Factor Equations for Reversible Reactions

Revisiting Isothermal Effectiveness Factor Equations for Reversible Reactions

Analysis of reactor–separator processes for polymeric and oligomeric degradation products with controlled molar mass distributions

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