Abstract
The research, development, and practical application of renewable energies are becoming a major trend with environmental problems such as increasingly serious global warming and the depletion of oil resources. Hydrogen is an ideal alternative energy source due to its cleanness and high combustion ratio. It is recognized as the most likely replacement for the existing coal and oil systems as the future energy base of the global economy. But as things stand, the hydrogen reserve technology and hydrogen storage technology at the current stage all have certain advantages and disadvantages. Based on this background, the study summarizes the current state of the art of hydrogen energy production technologies such as direct hydrogen production from fossil fuel, hydrogen production from electrolysis of water, hydrogen production from biomass, as well as four types of hydrogen storage methods, namely, high-pressure gaseous hydrogen storage, low-temperature liquid hydrogen storage, solid hydrogen storage, and organic liquid hydrogen storage, and analyzes the advantages and disadvantages of each technology. Among them, hydrogen production from electrolyzed water and bio-hydrogen production are the technologies with higher potential but still need to improve economic competitiveness. The high-pressure gaseous hydrogen storage technology can also be brought to market on a wide scale after cost reduction.
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