Green Hydrogen Explained
Green hydrogen is made using renewable energy such as solar, wind, or hydropower. Hydrogen is made using electrolysis, where the electricity splits water into hydrogen and oxygen. This is different to grey hydrogen, which is made using fossil fuels, green hydrogen emits almost no greenhouse gases during the production. Hydrogen carried energy. This means that it can store energy which can then be used later, instead of being a direct source for energy. Green hydrogen is considered to be extremely important because many industries and companies currently rely only on burning fossil fuels, and they can’t easily switch to electricity directly. This affects climate change because fossil fuels are a huge cause of greenhouse gas emissions and global warming. So green hydrogen can reduce these emissions by replacing fossil fuels. Researchers even argue that the use of green hydrogen can support the transition to a low carbon energy system. So green hydrogen is seen as a way to solve climate change since it lets renewable energy be stored and can be used in places where normal electricity may not be the most helpful.
Electrolysis is the main way to create green hydrogen. Renewable electricity is what powers an electrolyser and the electrolyser separates water molecules, so hydrogen is collected as fuel and oxygen is released as a by-product. Renewable energy is solar and wind power, which helps provide the electricity needed in electrolysis. And since renewable energy is used, this process avoids carbon emissions, so then excess renewable electricity can be converted into hydrogen instead of being wasted. The main types of electrolysers are alkaline electrolysers, which are older and more developed technology, but a lower cost; proton exchange membrane (PEM) electrolysers which are more flexible and can respond quickly to changes in the energy supply of renewable energy; and solid oxide electrolysers which uses newer technology and also operates are high temperatures. Therefore, the production process is simple in theory, but improving efficiency and actually reducing costs are important for larger use.
Some benefits are that there is a reduction of carbon, the energy storage, and industrial uses. Green hydrogen produces almost no carbon emissions when renewable electricity is used. It could replace fossil fuels in industries that currently create large emissions. It supports countries trying to achieve the target of net zero. However, renewable energy can be unreliable because of sunlight and changes in wind levels, but hydrogen can store more renewable energy to be used later. It can provide energy during periods when the renewable production is low. Green hydrogen can be used in steel manufacturing, and replace the coal in the production process; fertiliser production, which is used to make ammonia; transportation, which is potential fuel for heavy vehicles, ships, and other things; and electricity generation, which is used as stored energy when needed. So, green hydrogen’s biggest advantage would be that it connects renewable energy with industries that are difficult to decarbonise.
In terms of challenges, this includes the cost and infrastructure. In terms of costs, green hydrogen is more expensive than fossil fuel based hydrogen. The biggest costs come from renewable electricity, electrolysers, storage systems, and transporting infrastructure. Researchers believe that costs may decrease as technology improves. With infrastructure, challenges include how hydrogen requires special storage because it is a light gas. Also, new pipelines, storage facilities, and transportation systems are required. And building this infrastructure also needs a large investment. Julián Gómez and Rui Castro from the university of Lisbon mention how Green hydrogen has a strong potential for reducing greenhouse gas emissions. It is especially useful for the industries which are hard to decarbonise. However, improvements in technology and lower costs are necessary. So, researchers generally agree that green hydrogen is promising, but realistic planning and technological improvements are required.
In conclusion, green hydrogen has the potential, and can become an important part of the future energy system. It is not a complete replacement for all fossil fuels since it still faces challenges like cost and infrastructure. However, it can also play a major role in reducing emissions in industries where electricity can’t replace fossil fuels.. Investment in renewable energy and hydrogen technology will decide how successful it becomes. So, I think that green hydrogen should be developed and part of a wider clean energy strategy. Although it isn’t a perfect solution, it has major potential to help reduce global emissions and support a more sustainable future.
References:
Google Scholar — https://scholar.google.com
JSTOR — https://www.jstor.org
EBSCO — https://www.ebsco.com
Springer — https://link.springer.com
MDPI Journals — https://www.mdpi.com
ScienceDirect — https://www.sciencedirect.com