Green Bio-Hydrogen Energy and Biogas Production Technology

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

Deadline for manuscript submissions: 31 January 2027 | Viewed by 739

Editors


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Guest Editor
Biotechnology Department, São Paulo State University, Assis 19806-900, Brazil
Interests: biogas; bio-hydrogen; biological process; environmental biotechnology nutrient recovery

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Guest Editor
Bioprocess and Biotechnology Department, São Paulo State University, Botucatu 18610-034, Brazil
Interests: bioenergy; biomass fractionation; biogas; bio-hydrogen; chemical and biotechnological processes

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Guest Editor
Department of Nuclear Energy, Federal University of Pernambuco, Recife 50810-000, Brazil
Interests: low carbon hydrogen; dark fermentation; hydrogen; biohythane; bioeconomy
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The transition to a sustainable energy system demands the accelerated development of green bio-hydrogen and advanced biogas technologies. As versatile and carbon-neutral energy carriers, bio-hydrogen and biogas represent critical pathways for decarbonizing industrial and transportation sectors, while supporting the circular integration of biomass valorization.

This Special Issue on “Green Bio-Hydrogen Energy and Biogas Production Technology” seeks high-quality papers focusing on the production, purification, application, and related topics of hydrogen and biogas. We particularly welcome contributions that explore novel bioprocesses, feedstock pretreatment and fractionation, microbial engineering, and integrated biorefinery designs for co-producing biofuels and renewable chemicals. 

Topics include, but are not limited to, the following:

  • Biological hydrogen production;
  • Advanced biogas systems and biogas upgrading technologies;
  • Biomass pretreatment and fractionation;
  • Co-production of bio-hydrogen, biogas, and value-added chemicals from agro-industrial residues;
  • Kinetic modeling and sustainability evaluation of integrated biofuel production pathways;
  • Valorization of industrial waste for renewable gas production.

Dr. Bruna Soares Fernandes
Dr. Sarita Cândida Rabelo
Prof. Dr. Emmanuel Damilano Dutra
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 250 words) can be sent to the Editorial Office for assessment.

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-anonymized 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 semimonthly 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

  • biogas
  • biofuel
  • bio-hydrogen
  • biofinery
  • biological process
  • hydrogen production
  • environmental biotechnology
  • nutrient recovery

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Published Papers (1 paper)

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Research

15 pages, 3012 KB  
Article
Research on Sealing Mechanism and Structural Optimization of Electrolysis Cell for Hydrogen Production by Electrolysis of Water
by Huijun Xin, Zudong Shen, Zhaowang Dan, Xiangnan Wang, Minglei Hu, Deng Wang, Ende Yu, Linlin Zhou and Kuang Yun
Processes 2026, 14(12), 1969; https://doi.org/10.3390/pr14121969 - 17 Jun 2026
Viewed by 377
Abstract
In order to optimize the sealing structure of the electrolytic cell for hydrogen production by electrolysis of water and enhance its sealing performance, a finite element model of the electrolytic cell sealing was established using software. The influence of different parameters of the [...] Read more.
In order to optimize the sealing structure of the electrolytic cell for hydrogen production by electrolysis of water and enhance its sealing performance, a finite element model of the electrolytic cell sealing was established using software. The influence of different parameters of the sealing rib structure on the sealing performance was studied, and the variation law of gasket compressive stress under different sealing rib slot widths, angles, and spacings was explored. The results show that under the material constants of C10 = 7.0 × 10−3 and C01 = 6.05 in the Mooney–Rivlin constitutive model of the gasket, the gasket will deform and embed into the sealing rib groove after compression. At the same time, two parts of stress concentration will occur at the contact area between the gasket and the sealing rib groove, namely tensile stress concentration and compressive stress concentration. This stress concentration is the main source of sealing effect in practical work. After adding the sealing rib groove, the contact area between the sealing rib area and the gasket increases. When maximizing the peak sealing compressive stress serves as the optimization criterion, the optimal pitch settles at 0.4 mm; if the optimization objective shifts to attaining the utmost contact area, the preferable spacing amounts to 1 mm, accompanied by a maximum contact area increment of 34.31 percent. After comprehensive deliberation over sealing stress magnitude, functional sealing area, gas tightness efficiency as well as practical engineering applicability, 0.8 mm is pinpointed in this dissertation as the globally optimal spacing dimension. With a sealing rib pitch of 0.8 mm, a breadth of 1 mm, and an inclined angle of 20 degrees, the gasket yields substantial sealing stress alongside optimized post-assembly sealing contact area, wherein 26.44 percent of the overall gasket area contributes to effective sealing performance. Full article
(This article belongs to the Special Issue Green Bio-Hydrogen Energy and Biogas Production Technology)
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