This Monday, April 5, 2022,the Intergovernmental Group of Experts on the Evolution of It published the third and final part of its sixth report dedicated to solutions that can help us . Including the use of (h2Green says – Understand, hydrogen produced by from’ .
Thus, hydrogen can serve ‘To store electricity under a large-scale spreadintermittently” or even Trade in electricity between different regions to overcome seasonal differences or generation capacities.. Hydrogen can also used instead of For peak production and supply Process for industrial needs or use The first in the production of various chemicals and Synthetics ». Finally, of course, ” The Hydrogen fuel can power the heavy transportation sector (trucks, buses, ships, trains)”.
But theBEIS may question the idea. According to scientists from the universities of Cambridge, Reading and National Center for Atmospheric Sciences (NCAS), any hydrogen leakage will affect the composition of the atmosphere – with implications for the quality of And it will have an indirect warming effect on the climate, partially offsetting some of the expected benefits from the decline from (Ko2).
People are excited about CH₄ leaks, and global warming potential (GWP). Wait till they come here around H₂…
“We estimate that H₂ GWP100 is 11 ± 5 … GWP20 for H₂ of 33 [20 to 44]”
Well, half the equivalent of CH₄, but H₂ leaks will be the next discussion… https://t.co/vBxCTvu7UN
– Glenn Peters (@Peters_Glen) April 12 2022
Hydrogen and its indirect effect on global warming
What researchers confirm is, first of all, an increase in the concentration of hydrogen in our bodies– More specifically in the troposphere, the layer closest to the Earth – it will reduce the availability of hydroxyl radicals (OH). The same ones that participate in the decomposition of methane (CH4), strong . According to these works, the From the life of CH4 in our atmosphere by one year for every one part per million increase in concentration ( ) of hydrogen. Finally, even if we can reduce its concentration in our atmosphere could continue to increase – in the event of a H.2 It will be completely out of control.
elseThe greenhouse effect that researchers expect will be affected by the presence of hydrogen in the atmosphere: (s3The troposphere layer. Sometimes referred to as ‘bad ozone’. Because it is polluted and warm. But they point out here that the benefits associated with reduced methane emissions, (CO), volatile organic compounds (VOC) or oxides (NOx) generated by the adoption of the hydrogen economy has to balance things out. A slight increase in concentration on the one hand, versus a tendency to decrease in focus on the other. However, there is still uncertainty about how much these emissions will be reduced depending on the technologies that have already been replaced by hydrogen.
Increased H . concentration2 In our atmosphere it is also not expected to have a significant effect on stratospheric ozone. The one who protects us this time from radiationIt is dangerous for us .
On the other hand, more hydrogen in the atmosphere will lead to a concentration(h20) in the stratosphere. Water vapor, which we must remember, is one of the main contributors to global warming. If the concentration of H2 1.5 ppm must be increased – the higher leakage scenario – the water vapor concentration could increase by more than 1 ppm.
The effects of hydrogen on temperature
In conclusion, the researchers note that the adoption of hydrogen as an energy carrier can certainly reduce carbon dioxide emissions.2 Thus providing significant climate benefits. But, to maximize it, it will be necessary to strictly minimize leaks and reduce emissions from othersLike methane in particular.
According to calculations, an increase in hydrogen concentration – on the order of 1.5 ppm – “taken alone” It would raise global temperatures by 0.12°C – without taking into account the effects of reducing carbon dioxide emissions2 linked. If methane emissions did not decrease in parallel, the temperature would increase by 0.43 °C. But if leaks as well as methane emissions – and the other greenhouse gases mentioned above – are controlled, adopting a hydrogen economy will help lower temperatures by 0.26°C.
Taking into account all this new data including the indirect effects on greenhouse gases, the researchers finally show that the global warming potential (GWP) for hydrogen over 100 years is of 11. Climate from carbon dioxide2. Even if researchers realize that major uncertainties remain regarding the extent of Earth’s hydrogen basin, they advocate making reducing hydrogen leakage a real priority.
To help with this, aAssessment of leakage risks at all stages of the hydrogen production, transportation, storage and use chain. It tells us that during electrolysis, approximately 10% of hydrogen is lost ” and purify”. but what ” of this hydrogen It can reduce losses to less than 1%.
The study also classifies hydrogen transport media according to the losses they cause. Transport by tank truck H.2Seems to be the worst solution as it lost more than 13% of hydrogen. And we learn that approximately 3% of hydrogen is still lost in fuel cells. But less than 1% in distribution stations.
Hydrogen leakage into the atmosphere could ‘undermine the climate benefits of decarbonization’
It’s the new Holy Grail of energy: hydrogen is the subject of all major investment plans to supply transportation, industry, or even electricity storage. However, this gas, which is supposed to be green when produced using renewable energies, is not so much. According to some scholars.
Article fromPublished on 11/13/2021
file rolland the aircraft theft or Green hydrogen – produced from renewable sources – is emerging today as a decarbonizing solution. Last year, the European Commission introduced with a goal of producing 40 gigawatts of “green” hydrogen by 2050. Germany has openly declared that it wants to become the world number one in green hydrogen, while France to finance the development of this fuel. 17 states have already published a hydrogen plan and more than 20 countries are working on it. In total, hydrogen can account for 10% of By 2050, the International Energy Agency predicts.
Hydrogen is a powerful indirect greenhouse gas 200 times more than carbon dioxide
But have we measured all the consequences of this mass production correctly? ” Hydrogen is a powerful, short-lived indirect greenhouse gas that is 200 times more powerful than carbon dioxide when released.per kilogram ‘, explains to Steven Hamburg, chief scientist at the American NGO Environmental Defense Fund (EDF). The latter, who is one of the lead authors of the Intergovernmental Panel on Climate Change (IPCC), assures Futura that hydrogen leakage can ” Significantly reduce the climate benefits of switching fuels If not minimized “.
How does hydrogen exacerbate the greenhouse effect?
The scientist explains that hydrogen interacts with other gases in the atmosphere in several ways. On the one hand, it extends the life of methane by delaying its removal. In fact, methane reacted with hydroxide radicals in the air(CH4 + OH → CH3 + H2O). However, hydrogen also reacts with OH radicals (H2 + OH → H2O + H). ” So more hydrogen in the air means less OH to react with methane ”, continues the scientist. In addition, this reaction also releases water vapor, . Finally, hydrogen also leads to the formation , which is another very powerful greenhouse gas. ” Today, it is said that switching to hydrogen would eliminate the impact of climate on the climate However, when you consider these potential leaks, this is not the case. ‘, he warns.
1 ton of hydrogen consumed = 1 to 6 tons of CO2 equivalent2 Released
according to, up to 10% of hydrogen can “leak” during production, transportation and storage, multiplying current emissions by five. Hydrogen already has a high tendency to leak due to its low Its molecular weight and its low density. According to Falko Ueckerdt of the Potsdam Institute for Climate Impact Research, the consumption of one ton of hydrogen can release between 5 and 30 kilograms of this gas into the atmosphere, which depends on warming 200 times higher than carbon dioxide.2 May up to release 1 to 6 tons of carbon dioxide equivalent2. We are far from green hydrogen!
Other scholars he interviewed Euro Active However, we believe these concerns are exaggerated. Since hydrogen is a highly flammable gas,Safety is more stringent than natural gas. Furthermore it, “ Since hydrogen is more expensive than natural gas, this encourages the prevention of leaks in infrastructure“, Tempers Gniewomir Flis, expert on hydrogen at the German research center Agora Energiewende.” The problem is that detection thresholds today are very high. So it is impossible to know how much hydrogen is actually leaking into the atmosphere.“,” supports Elisa Oko, and another from EDF. So it’s time to look into this issue. ” Otherwise, the massive conversion to hydrogen will have dire consequences Stephen Hamburg concludes.