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Topical Collection "Feature Papers in Hydrogen Energy"

A topical collection in Energies (ISSN 1996-1073). This collection belongs to the section "Hydrogen Energy".

Editors

Prof. Dr. Talal Yusaf
E-Mail Website
Collection Editor
Dr. Mohamd Laimon
E-Mail
Collection Editor
School of Mechanical and Electrical Engineering, University of Southern Queensland, Toowoomba, QLD 4350, Australia
Interests: Energy Systems; Energy Modelling; Energy Security; Energy Efficiency; Sustainablity and Energy Policy; Energy Economics and Management; System Dynamics; Systems Thinking;
Dr. Hayder Abed Dhahad
E-Mail Website
Collection Editor
Mechanical Engineering Departement, University of Technology, Baghdad, Iraq
Interests: renewable energy; combustion; solar energy; fuel cell

Topical Collection Information

Dear Colleagues,

Growing energy demand, depletion of fossil fuels, threats of pollution and global warming from energy emissions are propelling countries to speed up the transition to new alternative clean fuels. One of the most promising alternatives is hydrogen, which can play an important role in that transition. Hydrogen is a good option for sectors that are difficult to electrify, such as heavy manufacturing. However, what makes hydrogen clean depends on how it is made; "grey" and "blue" hydrogen are made using fossil fuels, while "green" Hydrogen is made using renewable resources from solar or wind power. Green hydrogen can solve the world’s most pressing energy problems (CO2 emissions and global warming), as the bioproduct after hydrogen combustion is just water, and it can be blended into natural gas, thus making use of existing infrastructure. Yet, more research is needed to deal with hydrogen production, storage, and distribution challenges to make it a cost effective and efficient renewable alternative fuel. In this Topical Collection, we aim to leverage knowledge and research of hydrogen to achieve ground-breaking results with hydrogen energy development.

Prof. Dr. Talal Yusaf
Dr. Mohamd Laimon
Dr. Hayder Abed Dhahad
Collection 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 papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the collection 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. Energies 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 2000 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

  • Green hydrogen
  • Emission and pollution
  • Global warming
  • Renewable alternative fuel
  • Cost-effective

Published Papers (1 paper)

2021

Article
Feasibility Study of the Solar-Promoted Photoreduction of CO2 to Liquid Fuels with Direct or Indirect Use of Renewable Energy Sources
Energies 2021, 14(10), 2804; https://doi.org/10.3390/en14102804 - 13 May 2021
Viewed by 376
Abstract
Solar irradiation data collected at the latitude of Milan city, near the 45th parallel North, and original activity data of some high-performing photocatalysts (i.e., commercial TiO2 P25, TiO2 prepared by flame spray pyrolysis, 0.2% wt/wt Au/P25) have been used to evaluate [...] Read more.
Solar irradiation data collected at the latitude of Milan city, near the 45th parallel North, and original activity data of some high-performing photocatalysts (i.e., commercial TiO2 P25, TiO2 prepared by flame spray pyrolysis, 0.2% wt/wt Au/P25) have been used to evaluate the feasibility and the efficiency of an ideal solar photoreactor for the CO2 photoreduction in liquid phase. The best theoretical performance was achieved with commercial bare P25 titania, despite the fact that it was the material with the widest band gap (3.41 eV vs. 3.31 for FSP and 3.12 for Au/P25). In that case the efficiency of energy storage was calculated as about 2% (considering the total irradiated solar energy) and ca 18% (considering only the UV fraction of solar irradiance). Most of the energy content of the products was stored as formic acid, which would return a productivity of about 640 kg/year kgcat under daylight solar irradiation considering the variance of the irradiance data. Bare FSP titania gave a less promising result, while Au/P25 ranked in the middle. A comparison between the proposed setup and a photoreactor irradiated with UV lamps powered through a wind turbine or solar panels, which allow for an indirect use of renewable energy sources also intended for energy storage purposes, unveil that the latter is many times less efficient than the hypothesized direct solar photoreactor, despite the fact that it could be a reasonable storage system for energy production peaks. Full article
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