DAC is implemented in pilot plants by several companies in Europe and North America, and on an industrial scale by a Swiss company called Climeworks. They plan to suck one percent of the global CO2 emission in 2025. For this task, they will need to install around 750,000 DAC units.
After removing CO2 from the air, DAC plants have to get rid of it. One way to do that is to pump it underground, where it essentially turns into rock. They can also sell the CO2 for use in greenhouses (CO2 is a potent fertilizer) and carbonated drinks, or fuel, polymers, and concrete.
One way to do that is to pump it underground, where it essentially turns into rockComing up with new ways to use commercialize extracted CO2, once it’s sucked out of the air, can inspire new technology that reduces atmospheric CO2.
Right now, most of the hydrogen used in the chemical industry comes from fossil fuels. The steam reforming method — cheap and common but energetically demanding — heats up methane gas and water at very high temperature (700-1100 °C) to produce carbon monoxide and hydrogen. With these plants popping up more and more, we could see large-scale sustainable CO2 to methanol conversion in a few years.
But then what will do we do with all of that methanol?
We can either use it as it is, as fuel or antifreeze, or as a reactant to produce more chemicals. The first case is understandably not the solution to our CO2 problem: as a fuel, methanol burns and produces new CO2 that goes back into the atmosphere.
This process, described as it is, is a carbon-neutral process, and not carbon-negative as we need. Subtracting CO2 from the atmosphere is not enough if global emissions do not decrease.
An excerpt from
– 20.06.15 (Mon.)
. Covid-19 pandemic is ‘fire drill’ for effects of climate crisis, says UN official https://www.theguardian.com/environment/2020/jun/15/covid-19-pandemic-is-fire-drill-for-effects-of-climate-crisis-says-un-official
. CO2 sucked out of the atmosphere can be reused for new chemical processes https://massivesci.com/articles/carbon-dioxide-methanol-chemistry-reaction-one-pot-climate-change/
– 20.06.16 (Tue.)
. Amazon’s ‘Climate Pledge’ gets its first additional signatories: Verizon, Infosys and RB https://www.geekwire.com/2020/amazons-climate-pledge-gets-first-additional-signatories-verizon-infosys-rb/
– 20.06.17 (Wen.)
. Maersk Drilling to store CO2 in the underground https://shippingwatch.com/Offshore/article12227507.ece
– 20.06.18 (Thu.)
. 英中銀、コロナ対応で債券買取枠を拡大 マイナス金利議論せずhttp://www.asahi.com/business/reuters/CRBKBN23P2DN.html
. Climate crisis poses serious risks for pregnancy, investigation finds https://www.theguardian.com/environment/2020/jun/18/climate-change-air-pollution-investigation-study
– 20.06.19 (Fri.)
. 7月４日、協同組合デー 「気候変動に立ち向かおうhttps://www.jacom.or.jp/noukyo/news/2020/06/200619-44897.php
. Power Plant Exhaust Can Be Recovered, Reused https://www.manufacturing.net/home/news/21137823/power-plant-exhaust-can-be-recovered-reused
– 20.06.20 (Sat.)
. French citizens’ climate assembly rejects 28-hour work week proposal http://www.rfi.fr/en/france/20200620-french-citizens-climate-assembly-rejects-28-hour-work-week-proposal-social-justice-covid-19
– 20.06.21 (Sun).
Critics Say Bipartisan Carbon Market Bill Won’t Dent Climate Change https://modernfarmer.com/2020/06/critics-say-bipartisan-carbon-market-bill-wont-dent-climate-change/