A novel CFD simulation of H2 separation by Pd-based helical and straight membrane tubes

Abdi, Hamid; Pourmahmoud, Nader; Soltan, Jafar

doi:10.1007/s11814-020-0657-4

Cited by 7 publications

(2 citation statements)

References 25 publications

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“…Since the amount of produced H 2 in the reaction chamber in the case of the differential pressure of 0.020 MPa is lower compared to the case of the differential pressure of 0.010 MPa, it is easy to separate H 2 using a sweep gas. Considering H 2 separation only, the H 2 separation performance of the Pd-based membrane is promoted with the increase in the pressure difference between the reaction chamber and the sweep chamber [37]. Additionally, the H 2 separation performance of the Pd-based membrane is better when the purity of H 2 is higher [38].…”

Section: Impact Of Differential Pressurementioning

confidence: 99%

Performance Analysis of Hydrogen Production for a Solid Oxide Fuel Cell System Using a Biogas Dry Reforming Membrane Reactor with Ni and Ni/Cr Catalysts

Nishimura

Hayashi

Ito

et al. 2023

Fuels

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The present study aims to analyze the performance characteristics of the biogas dry reforming process conducted in a membrane reactor using Ni/Cr catalysts and to compare these characteristics with those obtained using pure Ni catalysts. The effect of the pre-set reaction temperature, the molar ratio of CH4:CO2 and the pressure difference between the reaction chamber and the sweep chamber on the characteristics of biogas dry reforming is analyzed. In the present work, the molar ratio of the supplied CH4:CO2 is varied to 1.5:1, 1:1 and 1:1.5. In this case, CH4:CO2 = 1.5:1 simulates a biogas. The pressure difference between the reaction chamber and the sweep chamber is varied to 0 MPa, 0.010 MPa and 0.020 MPa. The reaction temperature is changed to 400 °C, 500 °C and 600 °C. It is revealed that the highest concentration of H2 is achieved using a Ni/Cr catalyst when the molar ratio of CH4:CO2 is 1.5:1 at the differential pressure of 0.010 MPa and the reaction temperature of 600 °C. Under this condition, the H2 yield, H2 selectivity and thermal efficiency are 12.8%, 17.5% and 174%, respectively. The concentration of the H2 produced using a Ni/Cr catalyst is larger than that produced using a Ni catalyst regardless of the pre-set reaction temperature, the molar ratio of CH4:CO2 and the differential pressure.

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Section: Impact Of Differential Pressurementioning

confidence: 99%

Performance Analysis of Hydrogen Production for a Solid Oxide Fuel Cell System Using a Biogas Dry Reforming Membrane Reactor with Ni and Ni/Cr Catalysts

Nishimura

Hayashi

Ito

et al. 2023

Fuels

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show abstract

“…The literature survey indicates that most of the previous modeling studies were mainly focused on the modeling of steam methane reforming (SMR) − with a limited number of studies exploring other feedstocks such as natural gas, ethane, or prenaphtha reformed mixture. , Also, not many works in the past considered the effect of concentration polarization in their models. Patrascu and Sheintuch predicted the experimental performance of the PdAg membrane by a one-dimensional (1D) transient pseudo-homogeneous model considering the effect of concentration polarization.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Simulation of Prereformed Naphtha and Methane Steam Reforming in a Catalytic Membrane Reactor

Alrashed

Onaizi

Alenazey

et al. 2021

Ind. Eng. Chem. Res.

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As climate change concerns grow, clean energy systems based on hydrogen fuels are receiving substantial attention. This paper presents the performance analysis of the PdAu membrane in a packed bed reactor loaded with Ni-based catalysts. A comparative analysis was conducted between methane steam reforming and prereformed naphtha at temperature and pressure ranges from 450 to 650 °C and 5 to 40 bar, respectively. A one-dimensional pseudo-homogeneous model was developed using Aspen Custom Modeler for a packed bed membrane reactor (MR) with catalysts packed between the membrane and the reactor shell. The developed mathematical model was used to study the effect of key operational parameters on the membrane performance such as concentration polarization, coadsorption inhibition, temperature, feed and permeate pressure, and membrane length and its thickness. The MR performance was measured by methane conversion, hydrogen recovery, and hydrogen yield. Prereformed naphtha shows slightly better performance in terms of methane conversion and hydrogen yield approaching 87 and 79%, respectively, under operational conditions of 650 °C and 40 bar as it is closer to the thermodynamic equilibrium. Also, it has lower energy consumption by 36.3% compared to the steam methane reforming conditions.

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Modeling and comprehensive analysis of hydrogen production in a newly designed steam methane reformer with membrane system

Ullah¹,

Omer²,

Rashid³

et al. 2023

Computers & Chemical Engineering

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A novel CFD simulation of H2 separation by Pd-based helical and straight membrane tubes

Cited by 7 publications

References 25 publications

Performance Analysis of Hydrogen Production for a Solid Oxide Fuel Cell System Using a Biogas Dry Reforming Membrane Reactor with Ni and Ni/Cr Catalysts

Performance Analysis of Hydrogen Production for a Solid Oxide Fuel Cell System Using a Biogas Dry Reforming Membrane Reactor with Ni and Ni/Cr Catalysts

Modeling and Simulation of Prereformed Naphtha and Methane Steam Reforming in a Catalytic Membrane Reactor

Modeling and comprehensive analysis of hydrogen production in a newly designed steam methane reformer with membrane system

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