The effect of the hydrogen flux pressure and temperature dependence factors on the membrane reactor performances

Gallucci, Fausto; Falco, de M; Tosti, Silvano; Marrelli, Luigi; Basile, Angelo

doi:10.1016/j.ijhydene.2007.03.039

Cited by 40 publications

(6 citation statements)

References 12 publications

(18 reference statements)

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“…The temperature dependence of Sievert's constant has been observed to be exponential and conforms to the Arrhenius Equation [24]. The Arrhenius form of Sievert's constant is shown in Equation 12. ( ) ( )…”

Section: Permeationmentioning

confidence: 68%

Tritium Barrier Materials and Separation Systems for the NGNP

Sherman¹,

Adams²

2008

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Section: Permeationmentioning

confidence: 68%

Tritium Barrier Materials and Separation Systems for the NGNP

Sherman¹,

Adams²

2008

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“…The balance of reaction rate and hydrogen permeation rate is important for controlling intermediate formation with palladium membrane reactors. A dense palladium membrane reactor was used by Gallucci et al 242 to study the impact of hydrogen flux temperature and pressure on the conversion of methane and recovery of hydrogen. An experimental investigation by Tosti et al 192 was carried out on thin-wall Pd−Ag tubes that were created by diffusion welding.…”

Section: Pd Membrane Reactors For Fuel Reforming and H 2 Productionmentioning

confidence: 99%

Palladium-Alloy Membrane Reactors for Fuel Reforming and Hydrogen Production: A Review

et al. 2021

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Hydrogen has a potential to be a clean energy carrier that emits only water after combustion and can be produced from diverse feedstocks. Hydrogen has much better combustion characteristics in conventional combustion systems and higher energy efficiency when used with fuel cells. More than 75 million tons of hydrogen are currently produced primarily using fossil fuels as feedstock via steam methane reforming processes. Steam methane reforming is the mature technology for producing hydrogen and when coupled with CO2 capture can help address climate challenges. Inorganic palladium (Pd) membranes have demonstrated great potential to separate hydrogen due to their stability and high selectivity for hydrogen. In this review, several methods of fabricating Pd-alloy membranes are discussed and compared in terms of membrane stability and selectivity of hydrogen. Such methods include electroless plating (ELP), chemical vapor deposition (CVD), physical vapor deposition (PVD), and electroplating deposition (EPD). The permeability of hydrogen in different Pd-based alloy membranes are presented and compared. Focus has been made, in this review, on Pd–Ag, Pd–Cu, Pd–Au, and Pd–Ru alloys. The effects of impurities (H2S, CO, O2, and CO2) on performance of different Pd-based alloy membranes are also investigated. Moreover, the subject of using Pd-membrane reactors for fuel reforming and H2 production is investigated in detail based on numerous experimental and numerical studies in the literature, considering different membrane reactor designs: axial-flow tubular, radial-flow tubular, axial-flow spherical, packed-bed, fluidized bed, and slurry bubble column. The performance of Pd-membranes in such reactors for hydrogen production is compared, and the effects of temperature, pressure, H2O/CH4 ratio, and residence time on reformer performance are also investigated. Finally, the use of computational methods, particularly, density functional theory (DFT), to complement well-established experimental methods for studying the diffusion of H and its isotopes in different metals is reviewed. The review concludes with some insights into future work to bring Pd-membrane reactors to the level required for hydrogen production at the commercial level.

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“…To clarify, the MR developed in this paper is inspired by the previous study [14], from which its 1D steady-state mathematical model is adopted for our model as described in Equations ( 3) and (4). However, instead of compacting two packed reactors in one H 2 selective MR to increase the H 2 permeation in [14], we adopted a more efficient Pd/Ag membrane [35], extended the reactor's length, and increased the tube side's pressure, as listed in Table 1…”

Section: Membrane Reactor Model Developmentmentioning

confidence: 99%

System behavior prediction by artificial neural network algorithm of a methanol steam reformer for polymer electrolyte fuel cell stack use

Andersson

Wang

et al. 2021

Fuel Cells

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In this paper, a novel membrane reactor (MR) for methanol steam reforming is modeled to produce fuel cell grade hydrogen, which can be used as the inlet fuel for a later developed 500-W horizon polymer electrolyte fuel cell (PEFC) stack. The backpropagation (BP) neural network algorithm is employed to develop the mapping relation model between the MR's prime operational parameters and fuel cell output performance for future integration system design and control application. Simulation results showed that the MR model performs well for hydrogen production and the developed PEFC system presents good agreement with experimental results. Finally, the BP method captures an accurate mapping relation model between the MR inputs and PEFC output, for example, predicts the system's behavior well.

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The effect of the hydrogen flux pressure and temperature dependence factors on the membrane reactor performances

Cited by 40 publications

References 12 publications

Tritium Barrier Materials and Separation Systems for the NGNP

Tritium Barrier Materials and Separation Systems for the NGNP

Palladium-Alloy Membrane Reactors for Fuel Reforming and Hydrogen Production: A Review

System behavior prediction by artificial neural network algorithm of a methanol steam reformer for polymer electrolyte fuel cell stack use

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