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You are here: Home / Environment / Touted as clean, ‘blue’ hydrogen may be worse than gas, coal, researchers say

Touted as clean, ‘blue’ hydrogen may be worse than gas, coal, researchers say

August 15, 2021 by Captain Organic Planet

“Blue” hydrogen — an energy source that involves a process for making hydrogen by using methane in natural gas — is being lauded as a clean, green energy to help reduce global warming. But Cornell and Stanford University researchers believe it may harm the climate more than burning fossil fuel.

The carbon footprint to create blue hydrogen is more than 20% greater than using either natural gas or coal directly for heat, or about 60% greater than using diesel oil for heat, according to new research published in Energy Science & Engineering.

Robert Howarth, professor of ecology and environmental biology at Cornell, together with Mark Z. Jacobson, professor of civil and environmental engineering at Stanford, authored the report.

Blue hydrogen starts with converting methane to hydrogen and carbon dioxide by using heat, steam and pressure, or gray hydrogen, but goes further to capture some of the carbon dioxide. Once the byproduct carbon dioxide and the other impurities are sequestered, it becomes blue hydrogen, according to the U.S. Department of Energy.

The process to make blue hydrogen takes a large amount of energy, according to the researchers, which is generally provided by burning more natural gas.

“In the past, no effort was made to capture the carbon dioxide byproduct of gray hydrogen, and the greenhouse gas emissions have been huge,” Howarth said. “Now the industry promotes blue hydrogen as a solution, an approach that still uses the methane from natural gas, while attempting to capture the byproduct carbon dioxide. Unfortunately, emissions remain very large.”

Methane is a powerful greenhouse gas, Howarth said. It is more than 100 times stronger as an atmospheric warming agent than carbon dioxide when first emitted. The United Nations’ Intergovernmental Panel on Climate Change report released on Aug. 9 shows that cumulatively to date over the past century, methane has contributed about two-thirds as much to global warming as carbon dioxide has, he said.

Emissions of blue hydrogen are less than for gray hydrogen, but only by about 9% to 12%.

“Blue hydrogen is hardly emissions free,” wrote the researchers. “Blue hydrogen as a strategy only works to the extent it is possible to store carbon dioxide long-term indefinitely into the future without leakage back to the atmosphere.”

On Aug. 10, the U.S. Senate passed its version of the $1 trillion Infrastructure Investment and Jobs Act, which includes several billion dollars to develop, subsidize and strengthen hydrogen technology and its industry.

“Political forces may not have caught up with the science yet,” Howarth said. “Even progressive politicians may not understand for what they’re voting. Blue hydrogen sounds good, sounds modern and sounds like a path to our energy future. It is not.”

An ecologically friendly “green” hydrogen does exist, but it remains a small sector and it has not been commercially realized. Green hydrogen is achieved when water goes through electrolysis (with electricity supplied by solar, wind or hydroelectric power) and the water is separated into hydrogen and oxygen.

“The best hydrogen, the green hydrogen derived from electrolysis — if used wisely and efficiently — can be that path to a sustainable future,” Howarth said. “Blue hydrogen is totally different.”

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Filed Under: Environment Tagged With: Blue hydrogen, carbon dioxide, coal, gas, hydrogen

Article Sources

  • https://news.cornell.edu/stories/2021/08/touted-clean-blue-hydrogen-may-be-worse-gas-or-coal
  • https://onlinelibrary.wiley.com/doi/10.1002/ese3.956

About Captain Organic Planet

C.O.P. (Captain Organic Planet) is on a mission to inform anyone with an open mind that our food is far from natural; it is synthetic and fake. I believe our food supply is contributing to most of our diseases. The sad thing is it doesn't end there. Everywhere around us are dangers; in our household, in our water, and in your shampoo. Every aspect of your life is contributing to your health, wellness, sickness and disease. Challenge Conventional Culture. Live Life With An Organic Slant. L.iving O.rganically V.ibrates E.nergy

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