Efficient production of hydrogen from natural gas steam reforming in palladium membrane reactor

Chen, Yazhong; Wang, Yu‐Zhong; Xu, Hengyong; Xiong, Guoxing

doi:10.1016/j.apcatb.2007.10.024

Cited by 114 publications

(43 citation statements)

References 50 publications

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“…However, the noble metals have a higher coke resistivity in comparison to transition metals, but their main drawbacks are represented by their high prices and the low availability of noble metals [54]. For these reasons, nickel is a good substitution for noble metals in reforming processes, [55,56] and in the specialized literature, several studies dealt with the utilization of Ni-based catalyst for mixed steam reforming [57][58][59][60][61][62][63][64][65][66].…”

Section: Hydrogen Production With Mixed Reformingmentioning

confidence: 99%

Pure Hydrogen Production in Membrane Reactor with Mixed Reforming Reaction by Utilizing Waste Gas: A Case Study

et al. 2016

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A rise in CO2 and other greenhouse gases’ concentration from gas refinery flares and furnaces in the atmosphere causes environmental problems. In this work, a new process was designed to use waste gas (flue gas and flare gas) of a domestic gas refinery to produce pure hydrogen in a membrane reactor. In particular, the process foresees that the energy and CO2 content of flue gas can provide the heat of the mixed reforming reaction to convert flare gas into hydrogen. Furthermore, the characteristics of the feed stream were obtained via simulation. Then, an experimental setup was built up to investigate the performance of a membrane reactor allocating an unsupported dense Pd-Ag membrane at the mentioned conditions. In this regard, a Ni/CeO2 catalyst was loaded in the membrane reformer for mixed reforming reaction, operating at 450 °C, in a pressure range between 100 and 350 kPa and a gas hourly space velocity of around 1000 h−1. The experimental results in terms of methane conversion, hydrogen recovery and yield, as well as products’ compositions are reported. The best results of this work were observed at 350 kPa, where the MR was able to achieve about 64%, 52% and 50% for methane conversion, hydrogen yield and recovery, respectively. Furthermore, with the assistance of the experimental tests, the proposed process was simulated in the scaling up to calculate the needed surface area for MR in the domestic gas refinery.

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Section: Hydrogen Production With Mixed Reformingmentioning

confidence: 99%

Pure Hydrogen Production in Membrane Reactor with Mixed Reforming Reaction by Utilizing Waste Gas: A Case Study

et al. 2016

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“…Description and schematic diagram of the laboratory unit with an MR are given in [7]. A simplified schematic diagram of the laboratory MR with a total working length of 60 mm is shown in Fig.…”

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confidence: 99%

“…Application of model representations for calculating the basic technological and design parameters of a high-effi ciency membrane reformer with a 41.8 m 3 H 2 /h production capacity for feeding a 50 kW battery of proton exchange membrane fuel cells (PEMFC) with hydrogen is illustrated on a project example. Keywords: modeling, membrane reformer, high-purity hydrogen.Formulation of theoretical and experimental principles of high-purity hydrogen (HPH) production from products of steam reforming of methane and other hydrocarbons using thin palladium and palladium-alloy membranes has been drawing increasing attention [1][2][3][4][5][6][7]. In [3], the flow characteristics of a pilot membrane reformer (MR) with up to 40 m 3 /h production capacity and a mixture of steam and natural gas as the feedstock [5] is described quantitatively using a mathematical model [4] that takes account of hydrogen flux through the membrane and chemical reactions in the gas phase.…”

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confidence: 99%

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Analysis of Parameters of High-Purity Hydrogen Production from Methane in a Laboratory-Scale Membrane Reformer with an Ultrathin Palladium Membrane

Vandyshev

Куликов

2015

Chem Petrol Eng

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The key characteristics of a laboratory-scale membrane reformer for high-purity hydrogen production from methane with a 4-μm-thick palladium membrane are described quantitatively using a mathematical model for an ideal displacement reactor that takes account of the hydrogen mass fl ux through the membrane and chemical reaction in the gas phase. Application of model representations for calculating the basic technological and design parameters of a high-effi ciency membrane reformer with a 41.8 m 3 H 2 /h production capacity for feeding a 50 kW battery of proton exchange membrane fuel cells (PEMFC) with hydrogen is illustrated on a project example. Keywords: modeling, membrane reformer, high-purity hydrogen.Formulation of theoretical and experimental principles of high-purity hydrogen (HPH) production from products of steam reforming of methane and other hydrocarbons using thin palladium and palladium-alloy membranes has been drawing increasing attention [1][2][3][4][5][6][7]. In [3], the flow characteristics of a pilot membrane reformer (MR) with up to 40 m 3 /h production capacity and a mixture of steam and natural gas as the feedstock [5] is described quantitatively using a mathematical model [4] that takes account of hydrogen flux through the membrane and chemical reactions in the gas phase.In this work, the model [4] was used to analyze the experimental data [6, 7] obtained on a laboratory MR with an ultrathin (thickness 4 μm) membrane of pure palladium.Description and schematic diagram of the laboratory unit with an MR are given in [7]. A simplified schematic diagram of the laboratory MR with a total working length of 60 mm is shown in Fig. 1.CH 4 -3H 2 O mixture fed into the laboratory MR inlet A was used as the feedstock for producing HPH. The conventional steam methane reforming with the formation of a five-component gas mixture (H 2 , H 2 O, CO 2 , CO, and CH 4 ) in accordance with the reversible chemical reactions CH 4 + H 2 O D 3H 2 + CO 2 (1)was carried out in the annular space of the MR or in the high-pressure chamber (HPC) in the starting section L 1 . Thereafter, the steam methane reforming products flowed through the annular space into the zone L 2 where, under a pressure gradient on the membrane, extraction of HPH occurred in combination with catalytic conversion of methane. The hydrogen-lean multicomponent gas mixture was removed from the annular space as waste gas through the outlet B. The hydrogen diffused through the palladium membrane into the low-pressure chamber (LPC) and together with the purge gas (Ar)

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“…There are few works [4][5][6][7][8][9][10][11][12][13][14][15][16] devoted to mathematical modeling of various processes in the Pdbased MR. However, in most cases, the existing models are not capable of describing the full distribution of heat and mass transfer processes taking place in MR.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Study of Palladium Membrane Reactor Performance During Propane Dehydrogenation Using CFD Method

et al. 2017

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Efficient production of hydrogen from natural gas steam reforming in palladium membrane reactor

Cited by 114 publications

References 50 publications

Pure Hydrogen Production in Membrane Reactor with Mixed Reforming Reaction by Utilizing Waste Gas: A Case Study

Pure Hydrogen Production in Membrane Reactor with Mixed Reforming Reaction by Utilizing Waste Gas: A Case Study

Analysis of Parameters of High-Purity Hydrogen Production from Methane in a Laboratory-Scale Membrane Reformer with an Ultrathin Palladium Membrane

Theoretical Study of Palladium Membrane Reactor Performance During Propane Dehydrogenation Using CFD Method

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