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Selectivity and yield of exothermic consecutive reactions in catalytically active porous membrane reactor

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TLDR
In this article, the performance of a membrane reactor, in which the inside porous structure is impregnated with catalysts, under nonisothermal conditions for exothermic complex consecutive reactions was analyzed.
Abstract
This paper analyzes the performance of a membrane reactor, in which the inside porous structure is impregnated with catalysts, under nonisothermal conditions for exothermic complex consecutive reactions. The mathematical model based on an extended Fick’s model, which incorporates both diffusive and convective fluxes inside the membrane pores, was developed in the form of nonlinear differential equations to be solved numerically. The selectivity and yield of the desired intermediate product were calculated as a function of critical dimensionless parameter group’s such as the mass and heat Peclet groups and the Thiele modulus. It was clarified with the calculated and experimental results that the selectivity and yield of intermediates are significantly affected by convective flow inside the macro-pores.

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High-temperature membrane reactors: potential and problems

TL;DR: The most recent literature in the field of membrane reactors is reviewed in this paper, which describes the potentials of these reactors, which now seem to be well established, and focusing mostly on problems towards practical exploitation.
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Propylene Epoxidation using Molecular Oxygen over Copper- and Silver-Based Catalysts: A Review

TL;DR: Propylene oxide (PO) is a versatile chemical, mainly used in the synthesis of polyurethane plastics as mentioned in this paper, and it can be epoxidized using molecular oxygen to replace the tedious current synthesis protoco...
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Selectivity of partial hydrogenation reactions performed in a pore-through-flow catalytic membrane reactor

TL;DR: In this article, the selectivity of partial hydrogenation reactions of unsaturated substrates was studied in a membrane reactor operating at 323 K and 40 bar hydrogen pressure, where cross-linked polyacrylic acid palladium nanoparticles were incorporated as catalysts.
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Modeling-based optimization of a fixed-bed industrial reactor for oxidative dehydrogenation of propane

TL;DR: In this paper, a theory-based pseudo-homogeneous model was presented to describe the operation of a fixed-bed multi-tubular multi-antenna ODHP reaction.
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Catalytic membrane reactors for the oxidehydrogenation of propane: experimental and modelling study

TL;DR: In this paper, the authors used a simple phenomenological model to interpret the CMR performance and found that the use of a thicker catalytic layer can enhance the selectivity to propylene when propane and oxygen are differentiated at the tube and the shell with respect to the premixed feed.
References
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Journal ArticleDOI

Catalytic inorganic membrane reactors: present experience and future opportunities

TL;DR: A membrane is commonly regarded as a barrier capable of being selectively permeated by some components of a mixture or changing the composition of a fluid stream that flows through it due to a certain driving force (a pressure, concentration, or electric potential gradient) as mentioned in this paper.
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Inorganic membrane reactors

TL;DR: In this article, the authors present a review of membrane technologies for high-temperature gas phase reactions with particular emphasis on their application in high temperature gas-phase reactions, and further advancements in modifying the surface of the membrane to tailor them to specific catalytic and separation requirements will greatly enhance the versatility of the membranes as chemical reactors and separators.
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Intraparticle‐forced convection effect in catalyst diffusivity measurements and reactor design

TL;DR: In this paper, a complete model taking into account intraparticle diffusion and forced convection together with film diffusion is derived in order to analyze diffusivity measurements by physical methods, both in perfectly mixed reactors and fixed beds.
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Simultaneous intraparticle forced convection, diffusion and reaction in a porous catalyst

TL;DR: In this paper, the effect of intraparticle forced convection on a heterogeneous reaction within a porous catalytic pellet is examined, and it is found that an appreciable enhancement of the catalyst performance can be expected for liquid-phase reactions on coarse-grained particles.
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Methane oxidative coupling using porous ceramic membrane reactors—II. Reaction studies

TL;DR: In this article, a microfiltration ceramic membrane was used as an oxygen distributor for methane oxidative coupling in a fixed-bed catalytic reactor, and the results showed that the use of a porous ceramic membrane to effect the oxygen distribution can significantly improve the selectivity obtained at a given methane conversion.
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