I like this article. But speaking in parallels, DAC is the thermodynamic equivalent of a FCEV. We can do better, as we have with the BEV. Models showing plausible 2C emissions pathways don't scale DAC until 2040. We've only really begun exploring -ve emission tech. Wait and see.https://twitter.com/JesseJenkins/status/1183215427524202496 …
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It’s not that I think it won’t play any role. But without 1. Free electricity and 2. Emission allowance at 100$/tCO2 (never mind waivers for heavy industries) It’s at the very end of the merit order. Electrolysis will eat up free electricity long before DAC gets a chance.
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Replying to @gnievchenko
I realize it couldn’t be applied in most places where you’d have surplus RE and/or want to use electrolysis, but *negative emissions H2* looks like an interesting alternative to DAC or BECCS?https://www.anthropocenemagazine.org/2018/06/could-hydrogen-economy-throw-climate-change-lifeline/ …
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Replying to @AdamMarblestone
Potentially, but electrolysis at the scale to make an impact is not commercially viable today. I would say there are far more valuable uses of green H2 for mitigating other sectors before we have the capacity to go -ve emissions.
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