Bio-ethanol steam reforming and autothermal reforming in 3-μm channels coated with RhPd/CeO2 for hydrogen generation

To efficiently convert and utilize intermittent solar energy, a novel solar-driven ethanol steam reforming (ESR) system integrated with a membrane reactor is proposed. It has the potential to convert low-grade solar thermal energy into high energy level chemical energy. Driven by chemical potential, hydrogen permeation membranes (HPM) can separate the generated hydrogen and shift the ESR equilibrium forward to increase conversion and thermodynamic efficiency. The thermodynamic and environmental performances are analyzed via numerical simulation under a reaction temperature range of 100–400 °C with permeate pressures of 0.01–0.75 bar. The highest theoretical conversion rate is 98.3% at 100 °C and 0.01 bar, while the highest first-law efficiency, solar-to-fuel efficiency, and exergy efficiency are 82.3%, 45.3%, and 70.4% at 215 °C and 0.20 bar. The standard coal saving rate (SCSR) and carbon dioxide reduction rate (CDRR) are maximums of 101 g·m−2·h−1 and 247 g·m−2·h−1 at 200 °C and 0.20 bar with a hydrogen generation rate of 22.4 mol·m−2·h−1. This study illustrates the feasibility of solar-driven ESR integrated with a membrane reactor and distinguishes a novel approach for distributed hydrogen generation and solar energy utilization and upgradation.

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Recent progress in ethanol steam reforming for hydrogen generation

New Dimensions in Production and Utilization of Hydrogen ◽

10.1016/b978-0-12-819553-6.00003-9 ◽

2020 ◽

pp. 57-80

Author(s):

Tan Ji Siang ◽

Aishah Abdul Jalil ◽

Mohd-Nasir Nor Shafiqah ◽

Mahadi B. Bahari ◽

Herma Dina Setiabudi ◽

...

Keyword(s):

Steam Reforming ◽

Recent Progress ◽

Hydrogen Generation ◽

Ethanol Steam Reforming ◽

Ethanol Steam

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Production of hydrogen by ethanol steam reforming using Ni–Co-ex-hydrotalcite catalysts stabilized with tungsten oxides

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2020.11.143 ◽

2020 ◽

Author(s):

José L. Contreras ◽

Anabel Figueroa ◽

Beatriz Zeifert ◽

José Salmones ◽

Gustavo A. Fuentes ◽

...

Keyword(s):

Steam Reforming ◽

Ethanol Steam Reforming ◽

Tungsten Oxides ◽

Production Of Hydrogen ◽

Ethanol Steam

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Effect of Asymmetric Membrane Structure on Hydrogen Transport Resistance and Performance of a Catalytic Membrane Reactor for Ethanol Steam Reforming

Membranes ◽

10.3390/membranes11050332 ◽

2021 ◽

Vol 11 (5) ◽

pp. 332

Author(s):

Ludmilla Bobrova ◽

Nikita Eremeev ◽

Nadezhda Vernikovskaya ◽

Vladislav Sadykov ◽

Oleg Smorygo

Keyword(s):

Steam Reforming ◽

Transport Model ◽

Hydrogen Permeation ◽

Ethanol Steam Reforming ◽

Clear Understanding ◽

Catalytic Membrane ◽

Structure Property ◽

Asymmetric Membrane ◽

Supported Membrane ◽

Ethanol Steam

The performance of catalytic membrane reactors (CMRs) depends on the specific details of interactions at different levels between catalytic and separation parts. A clear understanding of decisive factors affecting their operational parameters can be provided via mathematical simulations. In the present paper, main results of numerical studies of ethanol steam reforming, followed by downstream hydrogen permeation through an asymmetric supported membrane, are reported. The membrane module consists of a thin selective layer supported on a substrate with graded porous structure. One-dimensional isothermal reaction–transport model for the CMR has been developed, and its validation has been carried out by using performance data from a lab-scale reactor with a disk-shaped membrane. Simulations demonstrate the model’s capabilities to analyze local concentrations gradients, as required to provide accurate estimates of the relationship between structure–property–performance. It was shown that transport properties of multilayer asymmetric membranes are highly related to the structural properties of each single layer.

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