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Originally Posted by SeeGeeWhy
ATCO is acting to blend up to 20% hydrogen into their sales gas volumes within 3 years and wants to be 100% eventually. Industry has committed to expanding the Alberta carbon trunk line which should facilitate more projects that employ steam methane reformers or in-situ combustion schemes
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Does it make any sense to source that 20% from gray hydrogen, generated from natural gas, then burned, as opposed to just burning natural gas? Has anyone done the emissions math on that? Because in my mind, you have efficiency losses every time you convert. Clearly they aren't going to use green hydrogen.
Just found this. hrmmmm....
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A peer-reviewed study published in Energy Science & Engineering, an open-source journal, concludes "the greenhouse gas footprint of blue hydrogen is more than 20 percent greater than burning natural gas or coal for heat and some 60 percent greater than burning diesel oil for heat," according to the paper.
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“Combined emissions of carbon dioxide and methane are greater for gray hydrogen and for blue hydrogen (whether or not exhaust flue gases are treated for carbon capture) than for any of the fossil fuels,” the study authors write in the paper. “Methane emissions are a major contributor to this, and methane emissions from both gray and blue hydrogen are larger than for any of the fossil fuels.”
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https://www.smithsonianmag.com/smart...tes-180978451/
Maybe we should think these policies through before assuming they are worth doing.