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Sustainable Development of Fuel Cells and Hydrogen Technologies: 2nd Edition

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A5: Hydrogen Energy".

Deadline for manuscript submissions: 15 September 2026 | Viewed by 661

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Guest Editor
Department of Chemical Engineering, Laboratory of Environmental Catalysis, Cyprus University of Technology, Limassol 3036, Cyprus
Interests: wastewater treatment; chemical engineering; catalysis; hydrogen
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Special Issue Information

Dear Colleagues,

One of the most important pillars upon which the green transition toward future global sustainable development is based is energy production from fuel cells using hydrogen. Increasingly stringent air pollution and climate change legislation that is being adopted by countries around the world is paving the way toward the widespread application of hydrogen and fuel cell technologies.

As a result, the scientific community is focusing its efforts on the development of advanced fuel cells that provide higher power output, with the aim of reducing the cost of electricity production and enabling hydrogen-sourced energy to conquer global energy markets.

Moreover, advances in green hydrogen technologies such as storage, transportation, electrolyzers, and purifiers have opened the way for the implementation of hydrogen in all sectors of industry, i.e., power generators, steam boilers, maritime industries, aviation, etc.

This Special Issue aims to bring together innovations in the “Sustainable Development of Fuel Cells and Hydrogen Technologies” in order to further increase the impact of hydrogen on the global energy market. Original research articles, comprehensive reviews, and well-documented case studies will be considered for publication.

Dr. Petros G. Savva
Guest Editor

Manuscript Submission Information

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 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

  • fuel cells
  • chemical engineering
  • hydrogen
  • green hydrogen technologies

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Published Papers (1 paper)

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Research

30 pages, 3446 KB  
Article
Effects of Hydrogen Enrichment on Combustion Stability, Pressure Behavior, Harmonic Response, and Emissions in a Marine Auxiliary Diesel Engine
by Petros G. Savva
Energies 2026, 19(13), 3214; https://doi.org/10.3390/en19133214 - 7 Jul 2026
Viewed by 294
Abstract
Hydrogen supplementation in compression-ignition diesel engines is increasingly investigated as a practical retrofit approach for reducing the environmental impact of existing marine and stationary diesel power systems. This study examines the effects of hydrogen enrichment on combustion stability, pressure behavior, harmonic response, fuel [...] Read more.
Hydrogen supplementation in compression-ignition diesel engines is increasingly investigated as a practical retrofit approach for reducing the environmental impact of existing marine and stationary diesel power systems. This study examines the effects of hydrogen enrichment on combustion stability, pressure behavior, harmonic response, fuel consumption, and exhaust emissions in a 1966 Deutz A12L 714 marine auxiliary generator-set. The engine was operated at 900, 1200, and 1500 rpm with hydrogen supplied through the intake-air stream at flow rates up to 130.15 L/min. Results indicate that hydrogen enrichment improved fuel consumption and combustion-related dynamic behavior without increasing peak cylinder pressure or exhaust-gas temperature. Low-order vibration harmonics, particularly the 1X and 3X components associated with torque ripple and cyclic combustion variability, decreased with hydrogen addition. COV(Pmax) remained below 0.27% across all operating conditions, indicating preserved combustion stability, while hydrocarbon emissions and fuel consumption decreased by approximately 30% and 13%, respectively, at the highest hydrogen enrichment conditions. Phase-averaged pressure traces obtained showed virtually unchanged combustion-cycle structure and periodicity under maximum hydrogen enrichment. The findings indicate that hydrogen enrichment improves combustion stability and overall engine performance without increasing combustion severity, supporting its potential application as a retrofit solution for marine auxiliary engines, distributed generators, and other legacy diesel-engine systems. Full article
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