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The crazy thing is, as far as I'm aware, it wouldn't be a difficult engineering feat to get standard air-filters on exhaust pipes. Most air filters are merely a
by alexandercrohde 8y ago
The crazy thing is, as far as I'm aware, it wouldn't be a difficult engineering feat to get standard air-filters on exhaust pipes. Most air filters are merely a sac of activated-charcoal.
- jhpankow 8y agoI don't even know where to start. Activated charcoal stuck in a car exhaust would not filter PM2.5 and wouldn't even do what was intended once it becomes saturated.
- alexandercrohde 8y agoMaybe you should start with a little bit of humility, and citing sources? Once it became saturated, you'd obviously replace it, likely at an annual exhaust inspection. [1] https://www.sciencedirect.com/science/article/pii/0016236189903141 https://www.sciencedirect.com/science/article/pii/0016236189... [2] https://university2.taylors.edu.my/EURECA/2014/downloads/46.pdf https://university2.taylors.edu.my/EURECA/2014/downloads/46....
- cameldrv 8y agoFor particles, this already exists on all new diesel vehicles (https://en.wikipedia.org/wiki/Diesel_particulate_filter https://en.wikipedia.org/wiki/Diesel_particulate_filter). They use filters made out of materials that can stand up to very high heat, and then when the filter gets clogged up, the vehicle injects some fuel and burns off the accumulated particles. This may start to get used in gasoline cars as well -- the new direct injection gas engines produce a lot of particulates, but this is not yet well regulated.