3 ms·

I would guess that gasoline must result in mostly heat and not particle pollution in PM10 and PM2.5.

by emj 6y ago

karakot 6y ago
https://en.m.wikipedia.org/wiki/Conservation_of_mass https://en.m.wikipedia.org/wiki/Conservation_of_mass
- Fezzik 6y ago
  That does not tell us anything though. The fact is that “The largest part of most combustion gas is nitrogen (N2), water vapor (H2O) (except with pure-carbon fuels), and carbon dioxide (CO2) (except for fuels without carbon); these are not toxic or noxious (although water vapor and carbon dioxide are greenhouse gases that contribute to global warming). A relatively small part of combustion gas is undesirable, noxious, or toxic substances, such as carbon monoxide (CO) from incomplete combustion, hydrocarbons (properly indicated as CxHy, but typically shown simply as "HC" on emissions-test slips) from unburnt fuel, nitrogen oxides (NOx) from excessive combustion temperatures, and particulate matter (mostly soot).” Emphasis added. https://en.m.wikipedia.org/wiki/Exhaust_gas https://en.m.wikipedia.org/wiki/Exhaust_gas
Gibbon1 6y ago
What happens is you can never get fully complete combustion. Some of the gasoline gets cracked and recombines to form HC soot. Which is also very reactive. Thus likely really bad for you. https://www.bts.gov/content/estimated-national-average-vehicle-emissions-rates-vehicle-vehicle-type-using-gasoline-and https://www.bts.gov/content/estimated-national-average-vehic... This gives actual figures for PM2.5 emissions from exhaust, brake wear, and tire wear per mile for both gasoline and diesel vehicles. There is an argument about how much EV's would reduce PM2.5. The above shows things were a lot worse 20 years ago. And current gasoline cars produce 0.008gm/mile PM2.5 from exhaust and 0.003 and 0.001 from brakes and tire wear. That says to me that EV would still reduce emissions a lot. One can assume that brake wear is half that of a gasoline powered car. So you go from 0.011gm/mile for gas. To probably 0.003 for EV's. Electrifying diesel trucks is a huge win.

I would guess that gasoline must result in mostly heat and not particle pollution in PM10 and PM2.5.

by emj 6y ago

I would guess that gasoline must result in mostly heat and not particle pollution in PM10 and PM2.5.

karakot 6y ago

https://en.m.wikipedia.org/wiki/Conservation_of_mass https://en.m.wikipedia.org/wiki/Conservation_of_mass

Fezzik 6y ago
That does not tell us anything though. The fact is that “The largest part of most combustion gas is nitrogen (N2), water vapor (H2O) (except with pure-carbon fuels), and carbon dioxide (CO2) (except for fuels without carbon); these are not toxic or noxious (although water vapor and carbon dioxide are greenhouse gases that contribute to global warming). A relatively small part of combustion gas is undesirable, noxious, or toxic substances, such as carbon monoxide (CO) from incomplete combustion, hydrocarbons (properly indicated as CxHy, but typically shown simply as "HC" on emissions-test slips) from unburnt fuel, nitrogen oxides (NOx) from excessive combustion temperatures, and particulate matter (mostly soot).” Emphasis added. https://en.m.wikipedia.org/wiki/Exhaust_gas https://en.m.wikipedia.org/wiki/Exhaust_gas

Gibbon1 6y ago

What happens is you can never get fully complete combustion. Some of the gasoline gets cracked and recombines to form HC soot. Which is also very reactive. Thus likely really bad for you. https://www.bts.gov/content/estimated-national-average-vehicle-emissions-rates-vehicle-vehicle-type-using-gasoline-and https://www.bts.gov/content/estimated-national-average-vehic... This gives actual figures for PM2.5 emissions from exhaust, brake wear, and tire wear per mile for both gasoline and diesel vehicles. There is an argument about how much EV's would reduce PM2.5. The above shows things were a lot worse 20 years ago. And current gasoline cars produce 0.008gm/mile PM2.5 from exhaust and 0.003 and 0.001 from brakes and tire wear. That says to me that EV would still reduce emissions a lot. One can assume that brake wear is half that of a gasoline powered car. So you go from 0.011gm/mile for gas. To probably 0.003 for EV's. Electrifying diesel trucks is a huge win.