{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,25]],"date-time":"2026-06-25T05:56:28Z","timestamp":1782366988024,"version":"3.54.5"},"reference-count":121,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2023,11,29]],"date-time":"2023-11-29T00:00:00Z","timestamp":1701216000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Cranfield University"},{"name":"Sion Group Ltd."}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Clean Technol."],"abstract":"<jats:p>This study emphasises the growing relevance of hydrogen as a green energy source in meeting the growing need for sustainable energy solutions. It foregrounds the importance of assessing the environmental consequences of hydrogen-generating processes for their long-term viability. The article compares several hydrogen production processes in terms of scalability, cost-effectiveness, and technical improvements. It also investigates the environmental effects of each approach, considering crucial elements such as greenhouse gas emissions, water use, land needs, and waste creation. Different industrial techniques have distinct environmental consequences. While steam methane reforming is cost-effective and has a high production capacity, it is coupled with large carbon emissions. Electrolysis, a technology that uses renewable resources, is appealing but requires a lot of energy. Thermochemical and biomass gasification processes show promise for long-term hydrogen generation, but further technological advancement is required. The research investigates techniques for improving the environmental friendliness of hydrogen generation through the use of renewable energy sources. Its ultimate purpose is to offer readers a thorough awareness of the environmental effects of various hydrogen generation strategies, allowing them to make educated judgements about ecologically friendly ways. It can ease the transition to a cleaner hydrogen-powered economy by considering both technological feasibility and environmental issues, enabling a more ecologically conscious and climate-friendly energy landscape.<\/jats:p>","DOI":"10.3390\/cleantechnol5040067","type":"journal-article","created":{"date-parts":[[2023,11,30]],"date-time":"2023-11-30T00:34:10Z","timestamp":1701304450000},"page":"1344-1380","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":128,"title":["A Comparative Analysis of Different Hydrogen Production Methods and Their Environmental Impact"],"prefix":"10.3390","volume":"5","author":[{"given":"Somtochukwu Godfrey","family":"Nnabuife","sequence":"first","affiliation":[{"name":"School of Water, Energy and Environment, Cranfield University, Cranfield MK43 0AL, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-3186-5902","authenticated-orcid":false,"given":"Caleb Kwasi","family":"Darko","sequence":"additional","affiliation":[{"name":"Geosciences and Geological and Petroleum Engineering Department, Missouri University of Science and Technology, Rolla, MO 65409, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Precious Chineze","family":"Obiako","sequence":"additional","affiliation":[{"name":"Department of Environmental Science, Baylor University, Waco, TX 76706, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1828-7663","authenticated-orcid":false,"given":"Boyu","family":"Kuang","sequence":"additional","affiliation":[{"name":"Centre for Computational Engineering Sciences (CES), School of Aerospace, Transport, and Manufacturing (SATM), Cranfield University, Cranfield MK43 0AL, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaoxiao","family":"Sun","sequence":"additional","affiliation":[{"name":"Centre for Propulsion and Thermal Power Engineering, School of Aerospace, Transport and Manufacturing (SATM), Cranfield University, Cranfield MK43 0AL, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Karl","family":"Jenkins","sequence":"additional","affiliation":[{"name":"Centre for Computational Engineering Sciences (CES), School of Aerospace, Transport, and Manufacturing (SATM), Cranfield University, Cranfield MK43 0AL, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,11,29]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"110615","DOI":"10.1016\/j.jece.2023.110615","article-title":"PtOx Deposited Fe3O4-ZnO\/TiO2 Nanocomposites for Photocatalytic H2 Production under Visible Light","volume":"11","author":"Althabaiti","year":"2023","journal-title":"J. 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