Influence of the support on permeation of palladium composite membranes in presence of sweep gas

Pinacci, P.; Drago, F.

doi:10.1016/j.cattod.2012.02.041

Cited by 21 publications

(11 citation statements)

References 19 publications

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“…The efficiency and lifetime of the fuel cell strongly depends on the rate of poisoning of the catalyst due to the presence of impurities in the feed. Palladium alloy-based membrane separation is reported to be an attractive method for the purification of hydrogen gas from mixture of other gases [16]. Another alternative method for hydrogen gas purification is the pressure swing adsorption (PSA) that works according to the species molecular characteristics and affinity for an adsorbent material [17,18].…”

Section: Fuel Purification Subsystem: Palladium Based Membrane Separamentioning

confidence: 99%

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Dynamic Modeling and Control of an Integrated Reformer-Membrane-Fuel Cell System

2018

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Owing to the pollution free nature, higher efficiency and noise free operation, fuel cells have been identified as ideal energy sources for the future. To avoid direct storage of hydrogen due to safety considerations, storing hydrocarbon fuel such as methane and suitably reforming in situ for hydrogen production offers merit for further investigation. Separating the resulting hydrogen in the reformate using membrane separation can directly feed pure gas to the anode side of fuel cell for power generation. Despite the numerous works reported in literature on the dynamic and steady state modeling and analysis of reformers, membrane separation units and fuel cell systems, there has been limited work on an analysis of the integrated system consisting of all the three components. This study focuses on the mathematical modeling and analysis of the integrated reformer, membrane, fuel cell system from first principles in a dynamic framework. A multi loop control strategy is developed and implemented on the mathematical model of the integrated system in which appropriate controllers based on the system dynamics are designed to examine and study the overall closed loop performance to achieve rapidly fluctuating target power demand and rejection of reformer feed and fuel cell coolant temperature disturbances.

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Section: Fuel Purification Subsystem: Palladium Based Membrane Separamentioning

confidence: 99%

“…According to Sievert's law [16], permeation of gas occurs through the palladium membrane based on the difference in partial pressures of hydrogen at both sides of the membrane. The molar flow rate of hydrogen permeating through the palladium membrane according to Sievert's law is given by [16]…”

Section: Mathematical Model Of Palladium Membrane Separationmentioning

confidence: 99%

Dynamic Modeling and Control of an Integrated Reformer-Membrane-Fuel Cell System

2018

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“…1. Top: reactor axial section, with the main gaseous fluxes; bottom: zoom on the supported Pd membrane law (Gupta (2003), Pinacci and Drago (2012)), where the driving force is the difference in H 2 partial pressure on the membrane sides: the reactor side and the support side. The two partial pressures are indicated as p H2,rea and p H2,0 respectively.…”

Section: H 2 Permeation Through the Pd Membranementioning

confidence: 99%

“…The two partial pressures are indicated as p H2,rea and p H2,0 respectively. The presence of the support, in turn, contributes to increasing the membrane-support interface pressure p 0 , with respect to an unsupported membrane (Pinacci and Drago (2012)).…”

Section: H 2 Permeation Through the Pd Membranementioning

confidence: 99%

“…The proposed model is calibrated thanks to experimental data collected on a laboratory plant at RSE (Ricerca sul Sistema Energetico) in Milan, Italy. The test rig (Pinacci and Drago (2012), Pinacci et al (2010)) can operate up to 30 bar and 450 • C and it includes process gas feeding units, for CO, CO 2 , H 2 , N 2 , He and steam; a sweep gas feeding unit; a tubular electric oven, for temperature control, to host a membrane or a reactora WGS reactor for this work -for testing; cooling lines for the membrane or reactor outlet gases, to condense steam and thus to allow to determine the gas composition by a gas-chromatographer; a computer, interfaced to a controller and a data acquisition system for the main process variables (temperature, pressure, flow rate).…”

Section: Introductionmentioning

confidence: 99%

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