Design of a Tubular Ceramic Membrane for Gas Separation in a PEMFC System

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Abstract

The objective of this study is to introduce a shortcut in the method of design for a tubular ceramic membrane (TCM) for gas separation. Generally, it explains the permeation of the multi component gas using cross flow models in a porous membrane and the surface area of the membrane required. The novel aspect of this method is that the expression for the length of the membrane is simplified to a number unit (NTU) and a height of transfer unit (HTU). The HTU term for porous membranes is characterised by the physical properties of the membrane; the feed flow rate, nF, membrane thickness, lM, feed pressure, PF, K the permeability of gas and the diameter of the membrane, DM. The integral for NTU of a porous membrane is the solution for the local permeate along the length of the membrane. It is found that, NTU mainly depends on the rejection stream, xR, along the membrane and it describes the relative degree of separation. The Proton Electrolyte Membrane Fuel Cell (PEMFC) system is taken as the case study. CO is the main culprit in reducing the performance of the PEMFC and will act as a catalyst poison for the fuel cell anode at a concentration as low as 100 ppm. Thus, the reformate, from primary reforming, contains a significant amount of CO and must be purified. The effect of some important parameters such as temperature, pressure and the thickness of membrane to the degree of separation are presented in this paper. From the results, it can be seen that the system could reduce the CO concentration from 2000 - 500 ppm. Basically the TCM will operate, in series, with a pressure swing adsorber in order to further reduce the concentration of CO to less than 10 ppm before entering the fuel cell stack. However, this paper only focuses on the design of the TCM. Besides this, it is observed that the purity of the hydrogen increased from 72.8 - 96% (at θ = 0.5) after the membrane.

Original languageEnglish
Pages (from-to)189-198
Number of pages10
JournalFuel Cells
Volume3
Issue number4
Publication statusPublished - 2003

Fingerprint

Ceramic membranes
Fuel cells
Protons
Electrolytes
Membranes
Gases
Reforming reactions
Permeation

Keywords

  • Ceramic Membrane
  • Cross-Flow Model
  • Height of a Transfer Unit
  • Number of Transfer Unit
  • PEMFC

ASJC Scopus subject areas

  • Energy(all)
  • Engineering(all)

Cite this

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title = "Design of a Tubular Ceramic Membrane for Gas Separation in a PEMFC System",
abstract = "The objective of this study is to introduce a shortcut in the method of design for a tubular ceramic membrane (TCM) for gas separation. Generally, it explains the permeation of the multi component gas using cross flow models in a porous membrane and the surface area of the membrane required. The novel aspect of this method is that the expression for the length of the membrane is simplified to a number unit (NTU) and a height of transfer unit (HTU). The HTU term for porous membranes is characterised by the physical properties of the membrane; the feed flow rate, nF, membrane thickness, lM, feed pressure, PF, K the permeability of gas and the diameter of the membrane, DM. The integral for NTU of a porous membrane is the solution for the local permeate along the length of the membrane. It is found that, NTU mainly depends on the rejection stream, xR, along the membrane and it describes the relative degree of separation. The Proton Electrolyte Membrane Fuel Cell (PEMFC) system is taken as the case study. CO is the main culprit in reducing the performance of the PEMFC and will act as a catalyst poison for the fuel cell anode at a concentration as low as 100 ppm. Thus, the reformate, from primary reforming, contains a significant amount of CO and must be purified. The effect of some important parameters such as temperature, pressure and the thickness of membrane to the degree of separation are presented in this paper. From the results, it can be seen that the system could reduce the CO concentration from 2000 - 500 ppm. Basically the TCM will operate, in series, with a pressure swing adsorber in order to further reduce the concentration of CO to less than 10 ppm before entering the fuel cell stack. However, this paper only focuses on the design of the TCM. Besides this, it is observed that the purity of the hydrogen increased from 72.8 - 96{\%} (at θ = 0.5) after the membrane.",
keywords = "Ceramic Membrane, Cross-Flow Model, Height of a Transfer Unit, Number of Transfer Unit, PEMFC",
author = "Kamarudin, {Siti Kartom} and {Wan Daud}, {Wan Ramli} and Mohammad, {Abdul Wahab} and Som, {A. Md} and Takriff, {Mohd Sobri}",
year = "2003",
language = "English",
volume = "3",
pages = "189--198",
journal = "Fuel Cells",
issn = "1615-6846",
publisher = "John Wiley and Sons Ltd",
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TY - JOUR

T1 - Design of a Tubular Ceramic Membrane for Gas Separation in a PEMFC System

AU - Kamarudin, Siti Kartom

AU - Wan Daud, Wan Ramli

AU - Mohammad, Abdul Wahab

AU - Som, A. Md

AU - Takriff, Mohd Sobri

PY - 2003

Y1 - 2003

N2 - The objective of this study is to introduce a shortcut in the method of design for a tubular ceramic membrane (TCM) for gas separation. Generally, it explains the permeation of the multi component gas using cross flow models in a porous membrane and the surface area of the membrane required. The novel aspect of this method is that the expression for the length of the membrane is simplified to a number unit (NTU) and a height of transfer unit (HTU). The HTU term for porous membranes is characterised by the physical properties of the membrane; the feed flow rate, nF, membrane thickness, lM, feed pressure, PF, K the permeability of gas and the diameter of the membrane, DM. The integral for NTU of a porous membrane is the solution for the local permeate along the length of the membrane. It is found that, NTU mainly depends on the rejection stream, xR, along the membrane and it describes the relative degree of separation. The Proton Electrolyte Membrane Fuel Cell (PEMFC) system is taken as the case study. CO is the main culprit in reducing the performance of the PEMFC and will act as a catalyst poison for the fuel cell anode at a concentration as low as 100 ppm. Thus, the reformate, from primary reforming, contains a significant amount of CO and must be purified. The effect of some important parameters such as temperature, pressure and the thickness of membrane to the degree of separation are presented in this paper. From the results, it can be seen that the system could reduce the CO concentration from 2000 - 500 ppm. Basically the TCM will operate, in series, with a pressure swing adsorber in order to further reduce the concentration of CO to less than 10 ppm before entering the fuel cell stack. However, this paper only focuses on the design of the TCM. Besides this, it is observed that the purity of the hydrogen increased from 72.8 - 96% (at θ = 0.5) after the membrane.

AB - The objective of this study is to introduce a shortcut in the method of design for a tubular ceramic membrane (TCM) for gas separation. Generally, it explains the permeation of the multi component gas using cross flow models in a porous membrane and the surface area of the membrane required. The novel aspect of this method is that the expression for the length of the membrane is simplified to a number unit (NTU) and a height of transfer unit (HTU). The HTU term for porous membranes is characterised by the physical properties of the membrane; the feed flow rate, nF, membrane thickness, lM, feed pressure, PF, K the permeability of gas and the diameter of the membrane, DM. The integral for NTU of a porous membrane is the solution for the local permeate along the length of the membrane. It is found that, NTU mainly depends on the rejection stream, xR, along the membrane and it describes the relative degree of separation. The Proton Electrolyte Membrane Fuel Cell (PEMFC) system is taken as the case study. CO is the main culprit in reducing the performance of the PEMFC and will act as a catalyst poison for the fuel cell anode at a concentration as low as 100 ppm. Thus, the reformate, from primary reforming, contains a significant amount of CO and must be purified. The effect of some important parameters such as temperature, pressure and the thickness of membrane to the degree of separation are presented in this paper. From the results, it can be seen that the system could reduce the CO concentration from 2000 - 500 ppm. Basically the TCM will operate, in series, with a pressure swing adsorber in order to further reduce the concentration of CO to less than 10 ppm before entering the fuel cell stack. However, this paper only focuses on the design of the TCM. Besides this, it is observed that the purity of the hydrogen increased from 72.8 - 96% (at θ = 0.5) after the membrane.

KW - Ceramic Membrane

KW - Cross-Flow Model

KW - Height of a Transfer Unit

KW - Number of Transfer Unit

KW - PEMFC

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