Green hydrogen

Green hydrogen is seen as a beacon of hope for the energy transition, as it can contribute to both the storage of renewable energies and the decarbonization of energy-intensive industries. But what exactly is green hydrogen, how is it produced and what potential and challenges does it present? Read all the news on relevant aspects of green hydrogen from the Table.Briefings editorial team here. What is green hydrogen? Green hydrogen refers to hydrogen that is produced from renewable energy sources such as wind or solar energy. In contrast to gray or blue hydrogen, which is produced from fossil fuels and therefore causes CO₂ emissions, green hydrogen is climate-neutral. However, the process for producing green hydrogen is energy-intensive and costly, which currently leads to a price disadvantage compared to conventional hydrogen. How is green hydrogen produced? Green hydrogen is mainly produced by electrolysis, a process in which water is split into hydrogen and oxygen using electrical energy. If the electricity comes from renewable sources, the hydrogen produced is called "green". The most common electrolysis processes are alkaline electrolysis, proton exchange membrane (PEM) electrolysis and high-temperature electrolysis: Why is green hydrogen so expensive? The cost of green hydrogen is currently significantly higher than for fossil alternatives. The price is determined by several factors: Does green hydrogen have a future? The future of green hydrogen depends heavily on technological and economic developments. However, experts agree that hydrogen, especially in its green form, can play a central role in reducing CO₂ emissions in various sectors: Political initiatives and funding programs of the European Union and Germany are geared towards strengthening the hydrogen economy. As part of the National Hydrogen Strategy, the German government has formulated ambitious targets for the production and use of green hydrogen and is investing in the expansion of the necessary infrastructure. Where is green hydrogen produced in Germany? Various projects for the production of green hydrogen are being planned and implemented in Germany. Some of the leading plants are located in regions with a high proportion of renewable energies: Does green hydrogen have disadvantages? Despite the potential, there are disadvantages associated with the production and use of green hydrogen: Can green hydrogen replace natural gas? In the long term, green hydrogen could replace natural gas in some areas, particularly in high-temperature applications and as a raw material in the chemical industry. However, this is more difficult in the heating sector and in electricity generation. Natural gas is currently much cheaper and more efficient to use. In the future, a mixture of natural gas and hydrogen, such as in so-called H₂-ready gas-fired power plants, could facilitate the transition. However, complete substitution will only be possible through a combination of technological innovations and scaling. Green hydrogen is a promising technology with great potential for decarbonization and supporting the energy transition. Especially in areas where electrification is reaching its limits, green hydrogen can offer a climate-friendly alternative. However, the price must be reduced through economies of scale, technological development and political will in order to make it competitive. Another focus in establishing hydrogen is the expansion of the infrastructure for producing, transporting and storing hydrogen.