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SCBA CO2 offset

Global warming fire safety
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The most common cause of death in a fire is smoke inhalation. Every house and public building should really be equipped with fire fighter's SCBA air tanks.

Isn't it also convenient that such tanks also pull CO2 from the air, almost indefinitely?

If just 1% of people in the world owned a 6.8L air tank, it would sequester 408 million liters of compressed air worldwide.

There are real doubts that the manufacturing of new tanks and related equipment would be carbon neutral. But it is possible over the long term that refilling tanks would become net carbon neutral.

4and20, Oct 19 2018

On calculating costs to compress air radiative_20cooled_20water_20condenser
[4and20, Oct 25 2018]

[link]






       //such tanks also pull CO2 from the air, almost indefinitely?// How is that? My understanding is that SCBA tanks are filled with either air or an oxygen-containing gas mix. How do they pull CO2 from the air (other than by containing air, along with the tiny amount of CO2 it contains)?
MaxwellBuchanan, Oct 19 2018
  

       Exactly.   

       Wikipedia says that dry air contains 0.04% carbon dioxide.   

       So, 163,000 liters of CO2.
4and20, Oct 19 2018
  

       On the other hand, Cartridge-operated fire extinguishers use compressed CO2 and can be refilled more easily. Most houses still seem to lack a fire extinguisher.
4and20, Oct 19 2018
  

       Well, that's a lifestyle choice, i.e. opting out of surviving in the event of a fire ...
8th of 7, Oct 19 2018
  

       What is the cost of a household unit that sequesters C02 into a SCUBA tank? True, if cheap enough, a tank per global household might add up.   

       Bring out your energetically low carbon, bring out your energetically low carbon.
wjt, Oct 25 2018
  

       It's not cheap. A complete fire fighter's unit can sell online for several thousand dollars or more.   

       The equation to calculate energy costs for sequestration seem to be buried at the bottom of the linked HB idea.
4and20, Oct 25 2018
  

       Steel is probably the best material for these tanks, cheap reliable and tough. Steel is about 1.9 tonnes of CO2 released for every tonne of steel. A 6.8l tank weighs just shy of 4kg, so that's 4*1.9 = 7.6 kg CO2 released into the atmosphere per cylinder. Or about 532,000 tonnes for 1% population.   

       On the other side, we have a 6.8l tank at say 3000 psi/200 Bar, which is 1360 l air equivalent. That's 1.36 m3. CO2 is 1.97 kg/m3 so at 0.04% That's about 1g of CO2, 7000 tonnes for 1%. So the net release is about 535,000 tonnes, or a 747 flying for 135 million km.   

       It's not all bad news if you could somehow fill the tanks with pure CO2 you'd only be off by 15 fold or so.
bs0u0155, Oct 26 2018
  
      
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