One type of renewable energy is green hydrogen, which is derived from fossil fuels rather than fossil fuels, and can be used as heavy aircraft and ships to drive heavy industry and burn large vehicles.
But green hydrogen critics say that as the world struggles to move away from fossil fuels, it is now a waste of renewable energy using solar or wind power to produce more fuel. At the same time, plans to use blue hydrogen to produce fossil fuels are gaining momentum.
A large part of the transition away from fossil fuels includes some of the daily machinery we use with oil and gas – cars and local transportation and, for example, heating of homes in some countries. For those previously electrified, such as computers and appliances, electricity from nuclear and Renewables such as wind and sun are replaced by coal.
But there are some industries that require a lot of energy that cannot meet their renewable energy needs. That’s the problem, because those industries are among the largest producers of greenhouse gas.
Experts say this is a huge potential for green hydrogen.
“Electricity from sources such as wind, solar and nuclear is essential to lighten our energy system — but it cannot do it alone, and it is home to very large emissions to reduce long-distance transportation and heavy industry,” he said. Energy analyst at the International Energy Agency.
“Hydrogen is versatile to fill some critical gaps,” Remme told CNN.
Green, blue or gray?
Hydrogen is the most abundant element in the earth. It is found in many things, including fossil fuels, water, plants, animals, and even humans, but it is never seen in its purest form. That means pure hydrogen, which must be separated from other molecules in energy processes.
Green hydrogen Renewable energy is used to extract hydrogen from a clean source. This typically involves the electrolysis of water – sending electrical waves into water into molecules.
Gray hydrogen Hydrogen is the most widely used form today. it is Relatively cheap, but derived from natural gas and typically uses fossil fuels as a source of energy. It is widely used in the chemical industry as a fertilizer and for refining oil. In the process of extracting hydrogen from natural gas, the remaining carbon dioxide is allowed to escape into the atmosphere, further contributing to climate change.
Blue hydrogen It is produced in the same way as gray hydrogen, but most of the carbon released during production is not “released” and is not released into the atmosphere, which is why it is described as a low-emission gas.
So, which is the best climate solution?
It ultimately depends on the energy used to produce it.
Gray hydrogen has long been seen as a clean “bridge” option as the world removes coal and oil, but it still contributes significantly to climate change.
Recent studies have shown that gray hydrogen emits more greenhouse gases than previously thought. Methane, a major component of greenhouse gas and natural gas, often flows through pipelines into the atmosphere.
If the electrolysis process to extract green hydrogen and hydrogen molecules from water is completely energized from renewable energy from the sun and wind, then green hydrogen emissions may be an alternative.
But it is not there yet.
The machines used to perform this electrolysis are expensive and the process is not particularly efficient.
A.D. By 2020, 95% of the low-carbon hydrogen produced was blue, according to a recent IAAA report. But As the green-hydrogen industry grows by 2050, it will be easier and more competitive to produce blue hydrogen by 2030, IEA reports. A.D. By 2050, the government and businesses are expected to share 35% of the green hydrogen and 62% of the greenhouse gas.
Jess Coal, who campaigned with Friends of the Earth, opposes any use of blue hydrogen. Coal said there may be a future for green hydrogen, but now is not the time to invest in it.
“You run the risk of converting your existing renewable energy into green hydrogen, and that’s an incredibly inefficient process,” Cowell told CNN.
He said it would not make sense to use hydrogen for heating purposes in the UK, which is being discussed as an alternative. If renewable energy sources are being used to generate hydrogen.
“What we want to see is that renewable energy is used for direct electrification,” he said. Rather than hydrogen.
Why is blue hydrogen controversial?
In a statement to CNN in mid-August, Chris Jackson, chairman of the UK Hydrogen and Petroleum Cell Association, said: The strategy was inconsistent with his “personal views on the role of hydrogen during the transition to zero world.” Jackson is also the CEO and founder of Protium Green Solutions, which focuses on renewable and green hydrogen.
In his statement, Jackson praised that green hydrogen is not a silver bullet.
“Similarly, I cannot ignore or argue that blue hydrogen is a viable and ‘green’ energy solution (proven by external studies).
A similar study, published in Peer Science and Engineering in early August, found that when blue hydrogen emits less than 9-12% of its carbon dioxide, it emits more methane than natural gas.
Overall, blue hydrogen greenhouse gas emissions are 20% higher than natural gas or coal, and 60% higher than diesel fuel.
There are also questions about whether carbon dioxide, which is often absorbed into the ground, is permanent.
“Our analysis is that carbon dioxide can be stored indefinitely, which is a bright and uncertain estimate. Although it is true, the use of blue hydrogen seems to be difficult to determine due to climate change, ”says the study.
Remie, from the IEA, said the study made some estimates that did not take into account the amount of greenhouse gas and that blue hydrogen is not the same as green, but that it is far from fossil fuels in the world. Fuel.
“There is a role for blue and green hydrogen, but we need to make sure that blue hydrogen is produced in high environmental standards,” he said. Technologies are already available to eliminate these emissions, which are often cost-effective and cost-effective.