Hysteresis Kinetics of Propene Oxidation Characterized by a Ag-Re Supported Membrane Reactor

Kobayashi, Masayoshi; Kanno, Tohru; Horiuchi, Jun‐ichi; Hoshi, Shigeyuki; Hattori, Noritaka; Togawa, Junya

doi:10.1016/s0167-2991(01)81952-2

Cited by 1 publication

(1 citation statement)

References 12 publications

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“…for multiphase hydrogenations [18][19][20]), flow-through filters [21,22], coated microchannels with carbon nanofiber layers [23] or as hollow fiber bio-and enzymatic reactors [12,24,25]. They are also frequently classified as non-permselective catalytic membrane reactors [26][27][28][29][30][31][32][33][34][35][36]. Higher catalyst activity (and in some cases, higher selectivity) were observed due to the intensification in the transport of reactants by convection in the selective epoxidation of propene [34], catalytic reduction of nitrite in water and dechlorination of chloroform [37], and the catalytic oxidation of propene [38].…”

Section: Introductionmentioning

confidence: 99%

Operation of a perfusive catalytic membrane with nonlinear kinetics

Lopes

Alves

Oliveira

et al. 2013

Chemical Engineering Journal

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Operation of a perfusive catalytic curved membrane is systematized into different transportreaction regimes. The internal viscous permeation improves the catalyst performance, measured here by the effectiveness factor and by its enhancement relative to purely diffusive conditions. A theoretical analysis is presented for nonlinear kinetic expressions, which are suitable to describe the consumption of a reactant in many (bio)catalytic systems. The kinetic and transport parameters required to attain maximum enhancement are related by simple design rules, which depend on the form of the reaction rate law (namely on the order of reaction and dimensionless inhibition constant). For zero-order reactions, these optimum conditions correspond to attaining negligible concentration at a position inside the membrane, while generically may be interpreted as separating situations of severe mass transfer resistance from cases of high effectiveness. It is important to incorporate the correct kinetic expression in the analysis, so that the predictions can be used in a quantitative manner. The results for the different regimes are compiled in enhancement plots and in Peclet-Thiele diagrams. Moreover, the study also yielded new results for the nonlinear reaction-diffusion in a curved membrane with its two surfaces exposed to different concentrations, a case of relevance in membrane reactors.2

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