Methane steam reforming using a membrane reactor equipped with a Pd-based composite membrane for effective hydrogen production

Kim, Chang‐Hyun; Han, Jae Yun; Lim, Hankwon; Lee, Kwan Young; Ryi, Shin Kun

doi:10.1016/j.ijhydene.2017.10.054

Cited by 67 publications

(20 citation statements)

References 40 publications

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“…To address this issue, great efforts have been made in recent years to illustrate how process intensication can be achieved through microchannel reactors. [33][34][35][36] Reaction engineering analysis is necessary to develop new processintensifying methods to meet the need of the rapid production of hydrogen from steam reforming. To successfully design microfabricated chemical systems and to further intensify the involved chemical process, a detailed understanding of the underlying mechanism of the transport phenomena is also necessary.…”

Section: -28mentioning

confidence: 99%

Computational fluid dynamics modeling of the millisecond methane steam reforming in microchannel reactors for hydrogen production

et al. 2018

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Methane steam reforming coupled with methane catalytic combustion in microchannel reactors for the production of hydrogen was investigated by means of computational fluid dynamics. Special emphasis is placed on developing general guidelines for the design of integrated micro-chemical systems for the rapid production of hydrogen. Important design issues, specifically heat and mass transfer, catalyst, dimension, and flow arrangement, were explored. The relative importance of different transport phenomena was quantitatively evaluated, and some strategies for intensifying the reforming process were proposed. The results highlighted the importance of process intensification in achieving the rapid production of hydrogen. High heat and mass transfer rates derived from miniaturization of the chemical system are insufficient for process intensification. Improvement of the reforming catalyst is also essential.The efficiency of heat exchange can be improved greatly if the reactor dimension is properly designed.Thermal management is required to improve the reliability of the integrated system. Co-current heat exchange improves the thermal uniformity in the system. The catalyst loading is a key factor determining reactor performance, and must be carefully designed. Finally, engineering maps were constructed to achieve the desired power output, and favorable operating conditions for the rapid production of hydrogen were identified.

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Section: -28mentioning

confidence: 99%

Computational fluid dynamics modeling of the millisecond methane steam reforming in microchannel reactors for hydrogen production

et al. 2018

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“…A wide application of this process is found in the chemical industry for the production of hydrogen and synthesis gas . The majority of hydrogen (approximately 48%) is produced by steam reforming or partial oxidation of methane . In addition, in recent years, a wide interest among engineers and scientists of different countries has produced a way to increase the energy efficiency of fuel‐consuming equipment as thermochemical waste‐heat recuperation by steam methane reforming …”

Section: Introductionmentioning

confidence: 99%

“…The nickel (Ni)‐based catalysts are widely used in large‐scale hydrogen production . Moreover, the noble metals such as ruthenium (Ru), rhodium (Rh), palladium (Pd), iridium (Ir), and platinum (Pt) are also used as active elements in the catalysts for steam methane reforming.…”

Section: Introductionmentioning

confidence: 99%

Flow dynamic in a packed bed filled with Ni‐Al₂O₃ porous catalyst: Experimental and numerical approach

Pashchenko

2019

AIChE Journal

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Numerical simulations and experiments have been carried out to explore the effect of particle shapes on the pressure drop and the loss factor in a packed fixed bed filled with a porous catalyst. The packed bed is presented by the Ni‐Al2O3 catalyst of the different shapes. The commercial program ANSYS Fluent is used for the analysis; more than 20 mln cells are used for computational fluid dynamics (CFD) modeling. The catalyst particles were set as a porous medium with the viscous resistance coefficients and the inertial resistance coefficients. The comparison of the pressure drops between the experimental and simulation results show a good correlation with the divergence of results <8%. To determine the effect of the porosity properties of the medium on the numerical results, two cases of CFD modeling were realized (with taking into account the porous medium properties and without it). The discrepancy between results increases with an increasing gas flow rate.

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“…Ideally, water can be split with help of renewable energies to produce hydrogen, generating a very low environmental impact [3][4][5]. However, diverse studies affirm that a transition period will be need before this ideal situation become profitable, using a wide variety of raw materials for both centralized and distributed hydrogen production systems [6][7][8][9][10]. In this context, new routes from waste materials are being widely studied in the last years, considering both solid matter such as biomass [11], plastics [11], tea [12] or industrial municipal wastes [13] and liquids, in example olive mill wastewater [14].…”

Section: Introductionmentioning

confidence: 99%

Interlayer Properties of In-Situ Oxidized Porous Stainless Steel for Preparation of Composite Pd Membranes

Furones

Alique

2017

ChemEngineering

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Abstract:Hydrogen is considered as a real alternative for improving the current energy scenario in the near future and separation processes are a crucial step for the economy of the process in both centralized and distributed production systems. In this context, Pd-based composite membranes appear as an attractive technology trying to reduce the Pd thickness by modifying the commercial supports, mainly formed by metals to fit properly in conventional industrial devices. In most cases, a final calcination step is required and hence, the metallic support can be oxidized. This work analyzes in detail the properties of intermediate layers generated by in-situ oxidation of tubular PSS supports as a crucial step for the preparation of Pd/PSS membranes. The oxidation temperature determines the modification of original morphology and permeability by increasing the presence of mixed iron-chromium oxides as temperature rises. A compromise solution need to be adopted in order to reduce the average pore mouth size and the external roughness, while maintaining a high permeation capacity. Temperature of 600 • C lets to reduce the average pore size from 3.5 to 2.1 µm or from 4.5 to 2.3 µm in case of using PSS supports with 0.1 or 0.2 µm porous media grades, respectively but maintaining a hydrogen permeation beyond targets of United States of America Department of Energy (US DOE). Lower temperatures provoke an insufficient surface modification, while greater values derive in a drastic reduction of permeability. In these conditions, two composite membranes were prepared by ELP-PP, obtaining 14.7 and 18.0 µm thick palladium layers in case of modifying PSS tubes of 0.1 or 0.2 µm media grades, respectively. In both cases, the composite Pd membranes exhibited a hydrogen perm-selectivity greater than 2000 with permeances ranged from 2.83 to 5.84·10 −4 mol m −2 s −1 Pa −0.5 and activation energies of around 13-14 kJ mol −1 .

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Methane steam reforming using a membrane reactor equipped with a Pd-based composite membrane for effective hydrogen production

Cited by 67 publications

References 40 publications

Computational fluid dynamics modeling of the millisecond methane steam reforming in microchannel reactors for hydrogen production

Computational fluid dynamics modeling of the millisecond methane steam reforming in microchannel reactors for hydrogen production

Flow dynamic in a packed bed filled with Ni‐Al₂O₃ porous catalyst: Experimental and numerical approach

Interlayer Properties of In-Situ Oxidized Porous Stainless Steel for Preparation of Composite Pd Membranes

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Methane steam reforming using a membrane reactor equipped with a Pd-based composite membrane for effective hydrogen production

Cited by 67 publications

References 40 publications

Computational fluid dynamics modeling of the millisecond methane steam reforming in microchannel reactors for hydrogen production

Computational fluid dynamics modeling of the millisecond methane steam reforming in microchannel reactors for hydrogen production

Flow dynamic in a packed bed filled with Ni‐Al2O3 porous catalyst: Experimental and numerical approach

Interlayer Properties of In-Situ Oxidized Porous Stainless Steel for Preparation of Composite Pd Membranes

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Flow dynamic in a packed bed filled with Ni‐Al₂O₃ porous catalyst: Experimental and numerical approach