Advancements in microreactor technology for hydrogen production via steam reforming: A comprehensive review of experimental studies

Yadav, Devendra; Lu, Xinlong; Vishwakarma, Chandra Bhushan; Jing, Dengwei

doi:10.1016/j.jpowsour.2023.233621

Cited by 11 publications

(1 citation statement)

References 204 publications

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“…Fabrication defects, such as the knobs shown in Figure 5a,c, as well as tolerances illustrated in Figure 5e, can lead to S-and U-shaped bubbles. These local defects result in a reduced flow area at the bubble's nose, necessitating a higher dislodgment pressure due to the reduced principal radius R 1,nose as per Equations ( 9) and (10). As a consequence, the bubble propagates one cell in the y-direction because of the lower propagation resistance at R 1,S1 adjacent to the nose interface.…”

Section: Influence Of Experimental Defects and Tolerances On The Vali...mentioning

confidence: 99%

Dislodgement of Hydrogen Bubbles in Microchannels with Embedded Pillars: An Analytical, Experimental, and Numerical Study

Gräfner,

Huang,

et al. 2024

Advanced Materials

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Microchannels with integrated pillars have enhanced the production capabilities and performance of various applications due to their high surface‐to‐volume ratio. However, emerging gas bubbles can become trapped, potentially limiting the functionality or efficiency of the device when scaled down to the low‐micrometer scale. Understanding the conditions required to dislodge these bubbles is thus critical for optimizing microfluidic devices with complex physical behaviors. This study presents an analytical model that outlines the dislodgment conditions and driving forces for such gas–liquid flows. These terms are derived from the gas–liquid interface properties, geometry, and processing parameters. As the density of the pillar arrangement is scaled down, the resistance to bubble dislodgment typically increases. Nevertheless, the bubble is compelled to dislodge at lower pressure loads when critical volumes are reached. This newly discovered effect is particularly noticeable in densely packed arrays and can be explained by the interplay of increased surface tension, geometrical restrictions, and volume‐preserving forces. The analytical terms and effects are validated through novel experimental and numerical methods tailored for microchannels in the low‐micrometer scale, showing strong agreement.This article is protected by copyright. All rights reserved

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Section: Influence Of Experimental Defects and Tolerances On The Vali...mentioning

confidence: 99%

Dislodgement of Hydrogen Bubbles in Microchannels with Embedded Pillars: An Analytical, Experimental, and Numerical Study

Gräfner,

Huang,

et al. 2024

Advanced Materials

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Introduction

Thapliyal,

Tewari,

Verma

et al. 2024

Functional Coatings for Biomedical, Energy, and Environmental Applications

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Research Progress on Characteristics of On‐Line Hydrogen Production by Methanol Steam Reforming

Chen,

Wang

2024

Energy Tech

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On‐line hydrogen production via methanol steam reforming (MSR) has gained considerable interest due to its high efficiency, affordability, and eco‐friendliness. Currently, this technology has been widely applied in the industry and has become an important method for hydrogen energy production. However, there are still some issues with this technology, such as short catalyst lifespan and CO pollution, which require further research and improvement. This article provides a comprehensive review of the research progress made in this field, with a particular focus on the catalyst development, reaction mechanism, theoretical calculation, and reactor design. Additionally, the challenges and prospects of on‐line hydrogen production by MSR are also discussed. In conclusion, MSR technology for hydrogen production has vast application prospects and development potential. It will be further explored in‐depth and extensively in future research.

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Advancements in microreactor technology for hydrogen production via steam reforming: A comprehensive review of experimental studies

Cited by 11 publications

References 204 publications

Dislodgement of Hydrogen Bubbles in Microchannels with Embedded Pillars: An Analytical, Experimental, and Numerical Study

Dislodgement of Hydrogen Bubbles in Microchannels with Embedded Pillars: An Analytical, Experimental, and Numerical Study

Introduction

Research Progress on Characteristics of On‐Line Hydrogen Production by Methanol Steam Reforming

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