Criteria for a Palladium Membrane Reactor or Separator Design II: Concentration Polarization Effects

Moshe Sheintuch

doi:10.1002/9781118906842.ch2

Criteria for a Palladium Membrane Reactor or Separator Design II: Concentration Polarization Effects

Moshe Sheintuch^*

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

Abstract

With the incorporation of membranes with better permeance and the integration of heat supply to the reactor through its wall, radial gradients in membrane separators or reactors may become important. We review approximations for radial gradients in a membrane reactor or a separator, based on mass transfer coefficients (k c), and show that they are equivalent to more rigorous methods when the Sh=k cR/D H is known (where D H is hydrogen diffusivity). Concentration polarization is important when the ratio of k c to permeance velocity is around unity or smaller. Results are tested against experimental results and 2D simulations of two such cases.

Original language	English
Title of host publication	Membrane Reactor Engineering
Subtitle of host publication	Applications for a Greener Process Industry
Publisher	wiley
Pages	22-36
Number of pages	15
ISBN (Electronic)	9781118906842
ISBN (Print)	9781118906804
DOIs	https://doi.org/10.1002/9781118906842.ch2
State	Published - 8 Aug 2016
Externally published	Yes

Keywords

Hydrogen production
Membrane reactors
Methane steam reforming
Pd membrane reactor
Propane dehydrogenation

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1002/9781118906842.ch2

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abstract = "With the incorporation of membranes with better permeance and the integration of heat supply to the reactor through its wall, radial gradients in membrane separators or reactors may become important. We review approximations for radial gradients in a membrane reactor or a separator, based on mass transfer coefficients (k c), and show that they are equivalent to more rigorous methods when the Sh=k cR/D H is known (where D H is hydrogen diffusivity). Concentration polarization is important when the ratio of k c to permeance velocity is around unity or smaller. Results are tested against experimental results and 2D simulations of two such cases.",

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N2 - With the incorporation of membranes with better permeance and the integration of heat supply to the reactor through its wall, radial gradients in membrane separators or reactors may become important. We review approximations for radial gradients in a membrane reactor or a separator, based on mass transfer coefficients (k c), and show that they are equivalent to more rigorous methods when the Sh=k cR/D H is known (where D H is hydrogen diffusivity). Concentration polarization is important when the ratio of k c to permeance velocity is around unity or smaller. Results are tested against experimental results and 2D simulations of two such cases.

AB - With the incorporation of membranes with better permeance and the integration of heat supply to the reactor through its wall, radial gradients in membrane separators or reactors may become important. We review approximations for radial gradients in a membrane reactor or a separator, based on mass transfer coefficients (k c), and show that they are equivalent to more rigorous methods when the Sh=k cR/D H is known (where D H is hydrogen diffusivity). Concentration polarization is important when the ratio of k c to permeance velocity is around unity or smaller. Results are tested against experimental results and 2D simulations of two such cases.

KW - Hydrogen production

KW - Membrane reactors

KW - Methane steam reforming

KW - Pd membrane reactor

KW - Propane dehydrogenation

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M3 - 章节

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SN - 9781118906804

SP - 22

EP - 36

BT - Membrane Reactor Engineering

PB - wiley

ER -

Criteria for a Palladium Membrane Reactor or Separator Design II: Concentration Polarization Effects

Abstract

Keywords

UN SDGs

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