Three‐phase fixed‐bed reactors

Iliuta, Ion; Larachi, Faı̈çal

doi:10.1002/9781119248491.ch5

Cited by 6 publications

(3 citation statements)

References 128 publications

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“…The trickle bed itself represents a three-phase system with liquid trickling down a fixed bed of solid particles, while the gas phase is conducted in co-or countercurrent flow. 7 In addition to the center compartment, the reactor commonly has a column head above and a sump beneath the trickle bed. The head space most often includes fixtures for liquid distribution and fittings for gas supply.…”

Section: Introductionmentioning

confidence: 99%

“…The broad deployment of trickle bed reactors ensues from their simplicity in operation and high interfacial surface areas. The trickle bed itself represents a three-phase system with liquid trickling down a fixed bed of solid particles, while the gas phase is conducted in co- or countercurrent flow . In addition to the center compartment, the reactor commonly has a column head above and a sump beneath the trickle bed.…”

Section: Introductionmentioning

confidence: 99%

“…The reactor performance depends on a variety of parameters, such as particle size and shape, packing arrangement, wetting characteristics, distributor design, gas and liquid flow rates, and the physical properties of the gas and liquid phase . For this reason, optimization and scale-up is quite difficult and requires profound knowledge and accurate prediction of transport kinetics and flow patterns on the particle and reactor scale …”

Section: Introductionmentioning

confidence: 99%

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Combined Two-Model CFD Simulation of Trickle Bed Reactors with Head-Sump Extension: Case Study on Hydrodynamics and Biological Methanation

Markthaler

Plankenbühler

Miederer

et al. 2022

Ind. Eng. Chem. Res.

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Trickle bed reactors are one of the world's most employed technologies for multiphase processing, and they have been scrutinized for decades. However, accurate prediction and scale-up of trickle bed reactors are still challenging owing to complex interactions of multiphase flow, interfacial mass transfer, and reaction kinetics. The present computational model provides an insight into process phenomena on the basis of Eulerian−Eulerian methodology. It captures all parts of a trickle bed reactorpacking, head, and sumpwhich enables simulation of co-and countercurrent flow, gas or liquid recycle, and arbitrary retention time. Applying this model, hydrodynamic simulations reveal an improved prediction of liquid holdup, liquid dispersion, and pressure drop compared to CFD models of only the trickle bed. Furthermore, the interfacial surface area is analyzed and validated on account of a literature correlation. Exemplifying the entire approach with chemical absorption and reaction, the simulation of biological methanation presents methane concentration and productivity which are of the same order of magnitude as experimental data for an operating pressure of p op = 0.1−1 MPa abs .

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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