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Alright HN domain experts. I’m prepared. What’s the rub?
by qeternity 6y ago
Alright HN domain experts. I’m prepared. What’s the rub?
- adammunich 6y agoIt’s only practical on mixtures with high co2 gas concentrations
- mdf 6y agoWould inside a chimney work?
- extropy 6y agoFrom the abstract it seems to be very applicable to combustion exhausts (coal/gas plants) and consuming 5-10% of the combustion energy to recapture the CO2. Hard to tell what is the required CO2 concentration without the full article. Typical combustion exhaust seems to be ~10% of CO2, https://en.wikipedia.org/wiki/Flue_gas https://en.wikipedia.org/wiki/Flue_gas Edit: spelling.
- raverbashing 6y agoI wonder how research is doing to concentrate CO2 from the PPM amounts we have "in regular air" There are at least two low-hanging fruits that make it "easier": CO2 is heavier than other important gases and mildly polar.
- magicalhippo 6y agoPlant lots of trees or similar, then burn them for electricity and capture the CO2 from the smoke. Compared to a lot of the other proposals out there it almost sounds plausible.
- lostapathy 6y agoOr skip a step. Turn the trees into lumber and build something with it. Long-lived wooden structures sequester carbon until they are abandoned and rot.
- marcusverus 6y agoWhy not just do a partial burn and reduce the remainder to charcoal? It would be much cheaper, require no chemicals, and the end product is pure carbon, which would be easier to store. You could literally dump it in a pile and deal with it later.
- idiotsecant 6y agoMaking charcoal is not energy-positive and still only results in about 50% carbon capture, best case scenario. Burning it in a biomass plant with good carbon capture does better and displaces carbon-emitting generation processes at the same time. As an added bonus biomass plants are excellent 'baseload' type plants, a feature that wind, solar, etc are missing without expensive storage and complex management schemes.
- AyrtonB 6y agoSuch as flue gases from fertiliser, cement, steel and power plants ... which make up a sizeable chunk of our emissions. We should be targeting CO2 capture at point-sources wherever possible. Why wait until it's diffused into the atmosphere before trying to capture it?
- chobeat 6y agoLike with every other solution, under the current political and economic systems, there's no incentive to scale it up quickly enough to make a dent in global warming and it will just live in small local prototypes and in the dreams of techno-solutionists.
- adammunich 6y agoThat too
- chr1 6y agoThat's not a techno solution worth to dream about, the real techno solution is a fine grained control of weather (like https://viento.ai https://viento.ai) and in that case the extra CO2 in atmosphere will be naturally sequestered in fields and farms in Sahara.
- neolog 6y agoThat "leadership team" doesn't seem qualified to be working in this area.
- dalbasal 6y agoAubrey de Grey, heh? IDK... now I like it more. What he is qualified for is running this sort of effort. I just don't know what to call this sort of effort. Viento is a ‘moonshot’ nonprofit pioneering targeted weather security... by combining big data, forecasting breakthroughs and AI directed weather interventions... framed as "break glass in case of climate emergency." So... I don't like the idea. I do however, like the way he puts together moonshot projects, generally. Maybe this will evolve into something better. It's useful to have 0.X% of people working on tech, to be doing it in an environment that isn't standard academia or big tech.
- pineaux 6y agoElon musk wasn't qualified to build a rocket company. Still pretty succesful though.