Electrochemical separation of hydrogen from reformate using PEM fuel cell technology

Gardner, C. L.; Ternan, Marten

doi:10.1016/j.jpowsour.2007.06.020

Cited by 55 publications

(35 citation statements)

References 12 publications

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“…The idea of using PEHPs for the purpose of purification of mixed streams was pioneered in the 1980s by Sedlak et al35 The concept was recently revived and several papers have been written over the past 2–3 years. Gardner and Ternan demonstrated the feasibility of recovery of hydrogen from H 2 /CO 2 mixtures with and without CO contamination 36. They demonstrated that pulsing the voltage to periodically oxidize adsorbed CO could mitigate the problem of CO contamination.…”

Section: Introductioncontrasting

confidence: 57%

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Efficiency of hydrogen recovery from reformate with a polymer electrolyte hydrogen pump

et al. 2010

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The energy efficiency of hydrogen recovery from mixtures of CO 2 , H 2 O, and H 2 by a polymer electrolyte hydrogen pump (PEHP) has been evaluated. The PEHP pumps protons across the polymer electrolyte, producing [99.99% pure H 2 and a concentrated CO 2 stream. Single stage PEHP experiments recovered 65% of the hydrogen with an energy efficiency of 50%. The energy efficiency is limited by hydrogen mass transport across the porous gas diffusion electrode. The mass transport resistance for hydrogen increases as H 2 is depleted from the CO 2 /H 2 mixture by the PEHP. Analysis shows that a multistage PEHP with fixed applied potential difference can recover [90% of the hydrogen with an energy efficiency of 75%, whereas a novel multistage PEHP design with a programmed voltage profile can achieve [90% energy efficiency with [98% hydrogen recovery.

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Section: Introductioncontrasting

confidence: 57%

“…Hydrogen purification from reformate mixtures with PEHPs has been demonstrated by several previous investigators 33, 34, 36–38. Those studies focused on the feasibility of the hydrogen pump for purification; only Casati et al37 performed any analysis on the recovery and efficiency of the process.…”

Section: Discussionmentioning

confidence: 99%

Efficiency of hydrogen recovery from reformate with a polymer electrolyte hydrogen pump

et al. 2010

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“…Also, due to the thin membrane-electrode assemblies (MEAs) used in PEM technology (less than 1 mm), a limited energy consumption of approximately 0.6 kWh/Nm 3 hydrogen (total power costs for separation and compression) is required [1]. In terms of applications, it is expected that hydrogen concentration and compression based on this technology will find applications in various industrial fields such as (i) separation and recycling of hydrogen used as cooling agent in turbines; (ii) separation of hydrogen from products of organic fuel conversion [2]; (iii) separation of hydrogen from waste gases of fuel cells; (iv) concentration and separation of hydrogen isotopes (cooling of nuclear reactors) [3,4]; (v) separation of hydrogen from mixtures with natural gas (so-called, ''hythane''), in particular, after transportation of hythane through gas pipelines [5].…”

Section: Introductionmentioning

confidence: 99%

Characterisation of a electrochemical hydrogen pump using electrochemical impedance spectroscopy

et al. 2011

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Electrochemical hydrogen pumps are electrochemical devices which are used for hydrogen purification and pressurization purposes. In such cells, gaseous hydrogen is oxidized at the anode and released at the cathode. Results presented in this paper are related to the characterization and optimization of a proton-exchange membrane (PEM) hydrogen pump using electrochemical impedance spectroscopy (EIS). Only the case of hydrogen purification is considered here. Current-voltage characteristics have been measured. The kinetics and efficiency of the cell have been investigated using EIS. The roles played by the cell structure (in particular by the ion-exchange polymer content in the electro-catalytic layers) and by different operating parameters (the cell temperature, the relative humidity and the partial pressure of hydrogen) on the overall process efficiency have been evaluated and are discussed.

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“…The same principle is used in PEM fuel cells as a standard method to measure the amount of hydrogen cross-over through polymer membranes [31]. Since only hydrogen is converted, the effects of hydrogen separation [32,33] and hydrogen recirculation at the anode side of a PEM fuel cell system [34] were recognized soon. The application to hydrogen compression may have occurred somewhat earlier [35][36][37].…”

Section: The Principle Of Electrochemical Hydrogen Purification and Cmentioning

confidence: 99%

An Engineering Toolbox for the Evaluation of Metallic Flow Field Plates

et al. 2019

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Metallic flow field plates, also called bipolar plates, are an important component of fuel cell stacks, electrolyzers, hydrogen purification and compression stacks. The manufacturing of these plates by means of stamping or hydroforming is highly suitable for mass production. In this work, a toolbox is created that is suitable for a screening process of different flow field design variants. For this purpose, the geometry and computational mesh are generated in an automated manner. Basic building blocks are combined using the open source software SALOME, and these allow for the construction of a large variant of serpentine-like flow field structures. These geometric variants are evaluated through computational fluid dynamics (CFD) simulations with the open source software OpenFOAM. The overall procedure allows for the screening of more than 100 variants within one week using a standard desktop computer. The performance of the flow fields is evaluated on the basis of two parameters: the overall pressure difference across the plate and the relative difference of the hydrogen concentration at the outlet of the channels. The results of such a screening first provide information about optimum channel geometry and the best choice of the general flow field layout. Such results are important at the beginning of the design process, as the channel geometry has an influence on the selection of the metal for deep drawing or hydroforming processes.

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Electrochemical separation of hydrogen from reformate using PEM fuel cell technology

Cited by 55 publications

References 12 publications

Efficiency of hydrogen recovery from reformate with a polymer electrolyte hydrogen pump

Efficiency of hydrogen recovery from reformate with a polymer electrolyte hydrogen pump

Characterisation of a electrochemical hydrogen pump using electrochemical impedance spectroscopy

An Engineering Toolbox for the Evaluation of Metallic Flow Field Plates

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