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      A Brief Review of Hydrogen Production Methods and Their Challenges

      , ,
      Energies
      MDPI AG

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          Abstract

          Hydrogen is emerging as a new energy vector outside of its traditional role and gaining more recognition internationally as a viable fuel route. This review paper offers a crisp analysis of the most recent developments in hydrogen production techniques using conventional and renewable energy sources, in addition to key challenges in the production of Hydrogen. Among the most potential renewable energy sources for hydrogen production are solar and wind. The production of H2 from renewable sources derived from agricultural or other waste streams increases the flexibility and improves the economics of distributed and semi-centralized reforming with little or no net greenhouse gas emissions. Water electrolysis equipment driven by off-grid solar or wind energy can also be employed in remote areas that are away from the grid. Each H2 manufacturing technique has technological challenges. These challenges include feedstock type, conversion efficiency, and the need for the safe integration of H2 production systems with H2 purification and storage technologies.

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          The role of hydrogen and fuel cells in the global energy system

          Hydrogen has been ‘just around the corner’ for decades, but now offers serious alternatives for decarbonising global heat, power and transport. Hydrogen technologies have experienced cycles of excessive expectations followed by disillusion. Nonetheless, a growing body of evidence suggests these technologies form an attractive option for the deep decarbonisation of global energy systems, and that recent improvements in their cost and performance point towards economic viability as well. This paper is a comprehensive review of the potential role that hydrogen could play in the provision of electricity, heat, industry, transport and energy storage in a low-carbon energy system, and an assessment of the status of hydrogen in being able to fulfil that potential. The picture that emerges is one of qualified promise: hydrogen is well established in certain niches such as forklift trucks, while mainstream applications are now forthcoming. Hydrogen vehicles are available commercially in several countries, and 225 000 fuel cell home heating systems have been sold. This represents a step change from the situation of only five years ago. This review shows that challenges around cost and performance remain, and considerable improvements are still required for hydrogen to become truly competitive. But such competitiveness in the medium-term future no longer seems an unrealistic prospect, which fully justifies the growing interest and policy support for these technologies around the world.
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            Hydrogen production from renewable and sustainable energy resources: Promising green energy carrier for clean development

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              Low cost hydrogen production by anion exchange membrane electrolysis: A review

                Author and article information

                Contributors
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                Journal
                ENERGA
                Energies
                Energies
                MDPI AG
                1996-1073
                February 2023
                January 20 2023
                : 16
                : 3
                : 1141
                Article
                10.3390/en16031141
                b856a814-3f15-41f5-b739-7a34b7e33b18
                © 2023

                https://creativecommons.org/licenses/by/4.0/

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