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Processes
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Recent Advances in Green Hydrogen Production and Hydrogen-Based Energy Storage...
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Recent Advances in Green Hydrogen Production and Hydrogen-Based Energy Storage Technology

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Energy Systems".

Deadline for manuscript submissions: 15 October 2025 | Viewed by 6320

Special Issue Editors

Dr. Song Hu

E-Mail Website
Guest Editor
School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China
Interests: hydrogen production; hydrogen-based energy storage systems; gas–liquid two-phase mass transfer; green hydrogen replacement in the industry section
Dr. Yanghong Xia

E-Mail Website
Guest Editor
College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
Interests: hydrogen production by water electrolysis; advanced control methods; stability analysis of power system; hybrid AC/DC microgrids
Special Issues, Collections and Topics in MDPI journals
Dr. Shunliang Ding

E-Mail Website
Guest Editor
School of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou 450001, China
Interests: hydrogen production by water electrolysis
Dr. Tianze Wang

E-Mail Website
Guest Editor
China North Vehicle Research Institute, Beijing 100081, China
Interests: safety issues in production, storage and transportation of hydrogen; hydrogen diffusion; hydrogen ignition

Special Issue Information

Dear Colleagues,

Rapid transitions are occurring in energy systems around the world in response to climate change. Renewable energy (RE) has garnered significant attention and promotion as a green and sustainable energy source. However, the reliability and availability of RE still encounter several challenges. This is because RE’s profile regarding uncertainty and intermittency can hardly match the energy demanded from society. Hydrogen, as an energy storage and conversion solution, being both an energy source and a material, presents a promising approach to addressing these issues concerning RE. Thus, the development of green hydrogen production and hydrogen-based energy storage technology has attracted much attention in recent years.

We are pleased to invite you to submit your research to this Special Issue, titled “Recent Advances in Green Hydrogen Production and Hydrogen-Based Energy Storage Technology”.

This Special Issue aims to collect cutting-edge research and developments in hydrogen energy from researchers on reports of their latest endeavors in advancing this field. Topics of this Special Issue include the following:

  • Design and optimization of electrolysis stacks;
  • Control strategies of electrolysis hydrogen production systems;
  • Improvement of electrolysis systems’ dynamic performance;
  • High-efficiency gas–liquid two-phase mass transfer in electrolyzer stacks;
  • Technical and economic analyses of hydrogen-based energy storage systems;
  • Green hydrogen replacement in chemical (such as ammonia and coal) and metallurgy industries;
  • Hydrogen safety;
  • Other relative aspects.

In this Special Issue, original research articles and reviews are welcome to be submitted. Research areas may include, but are not limited to, the above-outlined areas.

We look forward to receiving your contributions.

Dr. Song Hu
Dr. Yanghong Xia
Dr. Shunliang Ding
Dr. Tianze Wang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Processes is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • hydrogen production
  • hydrogen-based energy storage systems
  • gas–liquid two-phase mass transfer
  • green hydrogen replacement in industry section
  • hydrogen safety

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (3 papers)

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Research

15 pages, 3537 KiB  
Article
Mathematical Modeling and Experimental Validation for a 50 kW Alkaline Water Electrolyzer
by Min Liu, Xinyu Zheng, Yansong Jia, Guining Shao, Jianfeng Shi, Sheng Zeng, Kun Wang, Yang Li and Chaohua Gu
Processes 2024, 12(12), 2616; https://doi.org/10.3390/pr12122616 - 21 Nov 2024
Viewed by 3223
Abstract
Due to its high maturity and low cost, alkaline water electrolysis (AWE) technology has been widely integrated with large-scale renewable energy systems (RESs) for green hydrogen (H2) production. Here, to evaluate the operational performance of a 50 kW AWE electrolyzer under [...] Read more.
Due to its high maturity and low cost, alkaline water electrolysis (AWE) technology has been widely integrated with large-scale renewable energy systems (RESs) for green hydrogen (H2) production. Here, to evaluate the operational performance of a 50 kW AWE electrolyzer under different operation conditions, we developed an empirical modeling and experimental validation approach. The model particularly focuses on the polarization curve and the hydrogen to oxygen ratio (HTO). The relevant parameters of the empirical model were obtained by fitting the experimental data with MATLAB. The validity and accuracy of the established model and parameters were verified by comparing the fitted values with experimental values, and a good correlation was found. Since the experiments were performed in the sub-cell of 5 MW scale AWE electrolyzers, this model can also predict the performance of industrial MW-scale AWE electrolyzers and serve as a tool for the optimal design and control of industrial AWE electrolyzers. The results demonstrated that the models can achieve an accuracy with an R2 value exceeding 0.95 across a range of operational conditions. Full article
(This article belongs to the Special Issue Recent Advances in Green Hydrogen Production and Hydrogen-Based Energy Storage Technology)
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17 pages, 2169 KiB  
Article
Study on Suitability Evaluation Method of Non-Metallic Seals in Long Distance Hydrogen-Doped Natural Gas Pipelines
by Xiaobin Liang, Fan Fei, Weifeng Ma, Ke Wang, Junjie Ren and Junming Yao
Processes 2024, 12(11), 2353; https://doi.org/10.3390/pr12112353 - 26 Oct 2024
Viewed by 1136
Abstract
Hydrogen doping using existing natural gas pipelines is a promising solution for hydrogen transportation. A large number of non-metallic seals are currently used in long-distance natural gas pipelines. Compared with metallic seals, non-metallic seals have the advantages of corrosion resistance, light weight, and [...] Read more.
Hydrogen doping using existing natural gas pipelines is a promising solution for hydrogen transportation. A large number of non-metallic seals are currently used in long-distance natural gas pipelines. Compared with metallic seals, non-metallic seals have the advantages of corrosion resistance, light weight, and easy processing, which can improve the safety and economy of pipelines. In order to ensure the long-term safe use of seals in hydrogen-doped natural gas pipelines, this paper selects the non-metallic seals commonly used in long-distance natural gas pipelines and carries out the hydrogen-doped sealing test, hydrogen-doped aging test, and hydrogen-doped anti-explosion test on the non-metallic seals under the conditions of different hydrogen-doped ratios. At the same time, combined with the actual working conditions of a hydrogen-doped natural gas pipeline, the external environment, and other factors, the applicability evaluation index system was established, and the applicability evaluation model based on hydrogen-doped physical and chemical properties, fuzzy comprehensive evaluation, and the structural entropy weight method was developed and applied in the field. The results show that the evaluation result of nitrile rubber in soft seals is 1.7845, and the evaluation result of graphite-polytetrafluoroethylene material in hard seals is 1.5988, and both of them are at a good level. This paper provides technical support and judging strategies for the selection of non-metallic sealing materials for hydrogen-doped natural gas pipelines. Full article
(This article belongs to the Special Issue Recent Advances in Green Hydrogen Production and Hydrogen-Based Energy Storage Technology)
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11 pages, 3244 KiB  
Article
Key Components Degradation in Proton Exchange Membrane Fuel Cells: Unraveling Mechanisms through Accelerated Durability Testing
by Keguang Yao, Li Wang, Xin Wang, Xiaowu Xue, Shuai Li, Hanwen Zhang, Zhengnan Li, Yanpu Li, Gangping Peng, Min Wang and Haijiang Wang
Processes 2024, 12(9), 1983; https://doi.org/10.3390/pr12091983 - 14 Sep 2024
Viewed by 1033
Abstract
In the process of promoting the commercialization of proton exchange membrane fuel cells, the long-term durability of the fuel cell has become a key consideration. While existing durability tests are critical for assessing cell performance, they are often time-consuming and do not quickly [...] Read more.
In the process of promoting the commercialization of proton exchange membrane fuel cells, the long-term durability of the fuel cell has become a key consideration. While existing durability tests are critical for assessing cell performance, they are often time-consuming and do not quickly reflect the impact of actual operating conditions on the cell. In this study, improved testing protocols were utilized to solve this problem, which is designed to shorten the testing cycle and evaluate the degradation of the cell performance under real operating conditions more efficiently. Accelerated durability analysis for evaluating the MEA lifetime and performance decay process was carried out through two testing protocols—open circuit voltage (OCV)-based accelerated durability testing (ADT) and relative humidity (RH) cycling-based ADT. OCV-based ADT revealed that degradation owes to a combined mechanical and chemical process. RH cycling-based ADT shows that degradation comes from a mainly mechanical process. In situ fluoride release rate technology was employed to elucidate the degradation of the proton exchange membrane during the ADT. It was found that the proton exchange membrane suffered more serious damage under OCV-based ADT. The loss of F− after the durability test was up to 3.50 × 10−4 mol/L, which was 4.3 times that of the RH cycling-based ADT. In addition, the RH cycling-based ADT had a significant effect on the catalyst layer, and the electrochemically active surface area decreased by 48.6% at the end of the ADT. Moreover, it was observed that the agglomeration of the catalysts was more obvious than that of OCV-based ADT by transmission electron microscopy. It is worth noting that both testing protocols have no obvious influence on the gas diffusion layer, and the contact angle of gas diffusion layers does not change significantly. These findings contribute to understanding the degradation behavior of proton exchange membrane fuel cells under different working conditions, and also provide a scientific basis for developing more effective testing protocols. Full article
(This article belongs to the Special Issue Recent Advances in Green Hydrogen Production and Hydrogen-Based Energy Storage Technology)
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