CFD analysis of a hybrid sorption-enhanced membrane reactor for hydrogen production during WGS reaction

Ghasemzadeh, Kamran; Zeynali, R.; Basile, Angelo; Iulianelli, Adolfo

doi:10.1016/j.ijhydene.2017.06.152

Cited by 38 publications

(7 citation statements)

References 25 publications

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“…Palladium membranes were mostly applied in MRs for high-grade hydrogen generation [22][23][24][25][26][27][28][29], but in recent years several scientists investigated other membrane materials to evaluate the effectiveness of non Pd-based membranes applied to MRs, with the main purpose of achieving more economical solutions than Pd-based membranes utilization [30,31]. Compared to other membranes, silica membranes and their applications in MRs for hydrogen generation received particular attention since they are cheaper, show higher permeability and result in more robust than Pd-based membranes [30,[32][33][34][35]. As illustrated in Figure 7, the interest towards silica MRs from both an experimental and modeling point of view is testified by an increasing number of scientific publications in this field.…”

Section: Application Of Silica Membranes In Mr Systemsmentioning

confidence: 99%

“…It is generally accepted that the main benefit deriving from the modeling of such a process is due to cost saving, originated by the reduction of the experimental tests number. Concerning silica membranes and their applications in MRs, computational fluid dynamics (CFD), black box and molecular dynamic (MD) models were applied in various studies as addressed in literature [32][33][34], but most of them are based on 1-D model with a mass balance equation; in other cases, 2-D models were based on the utilization of CFD method. Table 4 reports some of the most representative modeling studies on silica MRs, highlighting the main details about them.…”

Section: Modeling Of Silica Mrsmentioning

confidence: 99%

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Progress in Modeling of Silica-Based Membranes and Membrane Reactors for Hydrogen Production and Purification

2019

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Hydrogen is seen as the new energy carrier for sustainable energy systems of the future. Meanwhile, proton exchange membrane fuel cell (PEMFC) stacks are considered the most promising alternative to the internal combustion engines for a number of transportation applications. Nevertheless, PEMFCs need high-grade hydrogen, which is difficultly stored and transported. To solve these issues, generating hydrogen using membrane reactor (MR) systems has gained great attention. In recent years, the role of silica membranes and MRs for hydrogen production and separation attracted particular interest, and a consistent literature is addressed in this field. Although most of the scientific publications focus on silica MRs from an experimental point of view, this review describes the progress done in the last two decades in terms of the theoretical approach to simulate silica MR performances in the field of hydrogen generation. Furthermore, future trends and current challenges about silica membrane and MR applications are also discussed.

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Section: Application Of Silica Membranes In Mr Systemsmentioning

confidence: 99%

Section: Modeling Of Silica Mrsmentioning

confidence: 99%

Progress in Modeling of Silica-Based Membranes and Membrane Reactors for Hydrogen Production and Purification

2019

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“…5 Hence, the deployment of an environmentally friendly and economically attractive process 6 with a low energy-penalty is of huge interest to researchers. Various research studies have been carried out to address the limitations of steam methane reforming (SMR) 7,8 which include Sorption Enhanced Reforming (SER), 9–29 Membrane Reforming (MR), 17,25,30–33 integrated Sorption Enhanced Membrane Reforming (SEMR) 34,35 and Gas Switching Reforming (GSR). Abanades et al 24,36–38 proposed the use of Ca/Cu looping in a single reactor through a three-step process; (a) sorption enhanced reforming with simultaneous carbonation of CaO; (b) oxidation of Cu to CuO with air; (c) calcination of CaCO 3 during the reduction of CuO with a fuel gas.…”

Section: Introductionmentioning

confidence: 99%

A novel technological blue hydrogen production process: industrial sorption enhanced autothermal membrane (ISEAM)

Eluwah,

Fennell,

Tighe

et al. 2023

Energy Adv.

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“…The model results agreed well with experimental results, when assuming a thickness of the stagnant mass transfer boundary layer around the membrane to be a predetermined value. Ghasemzadeh et al 59 studied a sorptionenhanced water gas shift reaction in a Pd−Ag membrane fixed bed reactor, using a two-dimensional, isothermal model, and the film transport resistance at the interface of gas/membrane was considered to be negligible. Ji et al 47 developed a computational fluid model to simulate sorption-enhanced steam reforming of methane in a fixed bed membrane reactor.…”

Section: ■ Introductionmentioning

confidence: 99%

Comprehensive Modeling of Sorption-Enhanced Steam Reforming of Coke Oven Gas in a Fluidized Bed Membrane Reactor

et al. 2020

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Integration of membrane hydrogen separation and carbon dioxide capture with fuel steam reforming efficiently promoted hydrogen production and feedstock conversion. In this study, catalytic steam reforming of coke oven gas in a sorption-enhanced fluidized bed membrane reactor (MA-SE-SRCOG) was simulated using a reactive three-fluid model under the Euler framework. The numerical studies provided insights into details about interactions of multiscale subprocesses, including hydrogen permeation, carbon dioxide adsorption, catalytic reforming, and multiphase flow dynamics, during MA-SE-SRCOG. Concentration polarization caused by hydrogen separation was also examined. Meanwhile, impacts of several operating parameters, such as reaction pressure, steam concentration, membrane position, and reactor scale, on the performance of MA-SE-SRCOG were evaluated in terms of CH4 conversion, CO selectivity, hydrogen recovery factor, and CO2 fix factor. The simulation results demonstrated that membrane hydrogen separation and carbon dioxide adsorption promoted reforming kinetics and reactant conversions in the fast reaction zone, and also extended the reactive zone, thus efficiently improving the overall reforming efficiencies. Fast CO2 adsorption kinetics showed more profound enhancements on reducing CO selectivity compared to membrane separation, which instead had greater potential to facilitate high CH4 conversion when membrane effectiveness (a parameter representing impacts of membrane area, layer thickness and composite on permeation rates) was sufficiently large, particularly at high operation pressures. With membrane effectiveness increasing from 1 to 5, a CH4 conversion of 91.3% was achieved by MA-SE-SRCOG at 0.33 MPa and 560 °C, while the H2 permeation flux was augmented from 0.077 mol/(m2·s) to 0.192 mol/(m2·s). However, the increase of membrane effectiveness would cause more serious H2 concentration polarization in FBMR, which inhibited the effective H2 separation rates, so membrane effectiveness >10 has been observed to not remarkably benefit CH4 conversion and H2 production further. High S/C (>6) enhanced the occurrence of larger bubbles, and decreased the driving force (hydrogen partial pressure) for hydrogen permeation, both of which degraded the reforming performances and reduced yield of high purity H2. The more closely membrane units were installed to the fast reaction zone, the larger the enhancements of membrane expected to exert on COG-steam reforming reactions. With the given dimensions of the membrane tube, the decrease of reactor diameter helped to decrease concentration polarization, so higher CH4 conversion and H2 separation factors were achieved.

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CFD analysis of a hybrid sorption-enhanced membrane reactor for hydrogen production during WGS reaction

Cited by 38 publications

References 25 publications

Progress in Modeling of Silica-Based Membranes and Membrane Reactors for Hydrogen Production and Purification

Progress in Modeling of Silica-Based Membranes and Membrane Reactors for Hydrogen Production and Purification

A novel technological blue hydrogen production process: industrial sorption enhanced autothermal membrane (ISEAM)

Comprehensive Modeling of Sorption-Enhanced Steam Reforming of Coke Oven Gas in a Fluidized Bed Membrane Reactor

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