Catching CO2 from trucks and reducing their emissions by 90% • Hacker News Board

Re: Catching CO2 from trucks and reducing their emissions by 90%

#101

Post by on_and_off » Fri, Dec 27, 2019, 5:56 AM UTC

manicdee wrote: post #90

on_and_off wrote: post #69

Earlier quoted context omitted.

It sound like a tough sell to me if the vehicle can be retrofitted to capture 90% of the CO2 it emits. To be fair, once it is captured, I am guessing (e.g. no data) that using it as fuel would release CO2 as well, so we would be somewhere below these 90%. Still, the new vehicle won't appear out of thin air, and the electricity it uses won't either (hopefully it is nuclear or renewable). Either way, I don't see why su…

Capturing 90% of the CO2 is a nonsense claim.

how so ? that's the claim of the article.

I am not claiming that this makes it automatically true, but some data to back why it is false would help.

Re: Catching CO2 from trucks and reducing their emissions by 90%

#102

Post by on_and_off » Fri, Dec 27, 2019, 5:59 AM UTC

Taniwha wrote: post #84

on_and_off wrote: post #69

Earlier quoted context omitted.

It sound like a tough sell to me if the vehicle can be retrofitted to capture 90% of the CO2 it emits. To be fair, once it is captured, I am guessing (e.g. no data) that using it as fuel would release CO2 as well, so we would be somewhere below these 90%. Still, the new vehicle won't appear out of thin air, and the electricity it uses won't either (hopefully it is nuclear or renewable). Either way, I don't see why su…

Well because it's 90 percent efficient vehicles will emit 10% the amount of CO2, but the thing is all the CO2 eventually gets emitted, just more slowly. That might be ok if we weren't already at the world's carrying capacity for CO2, instead we need to be drastically reducing our emissions this is just an expensive stopgap measure that keeps us digging up carbon. As others have pointed out we're not just burning the…

>As others have pointed out we're not just burning the Amazon, we are burning all the Amazons back through geological time.

I agree 100% and it disturbs me very deeply, along with the hundreds of other insane things going on these days, climate grief is definitely a good way to describe how many people feel about the magnitude of these issues.

>but the thing is all the CO2 eventually gets emitted, just more slowly

Not necessarily, we could (and should) sequester CO2.

Re: Catching CO2 from trucks and reducing their emissions by 90%

#103

Post by manicdee » Sun, Jan 05, 2020, 12:02 PM UTC

on_and_off wrote: post #101

manicdee wrote: post #90

Earlier quoted context omitted.

Capturing 90% of the CO2 is a nonsense claim.

how so ? that's the claim of the article. I am not claiming that this makes it automatically true, but some data to back why it is false would help.

Thermodynamics: the energy produced by the engine comes from forming CO2 and heat in the first place. Capturing 90% of it without using all the energy produced by the combustion doesn’t make sense, it defies the laws of physics because entropy is being reversed.