Smog reducing shingles? - Page 1
Forum section: electronics / general

author: GregDunn
author_rank: Frequent Contributor
timestamp: June 08, 2020, 03:26:17 pm
content: If anything ever sounded like a scam, this is it. But apparently there has been limited testing done that shows it working to some extent. I'm dubious.

author: Kleinstein
author_rank: Super Contributor
timestamp: June 08, 2020, 04:56:56 pm
content: It sounds somewhat dubious, but there is some real effect. Some surfaces (AFAIK TiO2) in combination with sunlight can react with some parts of the smog and air pollutants, especially O3 and NOx. However there is a slight catch to this: in many areas smog is a problem on cloudy foggy winter days when there is not much sun. So it won't help on those days it would be needed most.

author: Haenk
author_rank: Super Contributor
timestamp: June 09, 2020, 06:23:19 am
content: There has been an extensive test in Germany and according to Google in Italy as well using smog reducing paint:https://roma.repubblica.it/cronaca/2018/10/26/foto/roma_inaugurato_il_murales_anti-smog_di_455_mq_che_purifica_l_aria_portate_i_vostri_figli_a_respirare_qui_sotto_-210063017/1/#1So yes: it works.

author: SparkyFX
author_rank: Frequent Contributor
timestamp: June 09, 2020, 08:47:49 am
content: The question is if the effect is more pronounced than particles just sticking to surfaces that wash off anyway, i.e. because of being a surface. Or if the effective surface area yields more particles sticking to it than otherwise just being captured there and unable to gather more dust before the next rain. At some point the effect might not be above any other roof surface - and the video does not state that it actually reduces particle size or such. If i get my physics correct some particle sticking to a surface or being washed off with water might be counted as ionization.Planting trees might have a bigger effect.

author: Haenk
author_rank: Super Contributor
timestamp: June 09, 2020, 01:00:49 pm
content: Quote from: SparkyFX on June 09, 2020, 08:47:49 amUnfortunately that's impossible at the location where emissions occur. However you *do* have large buildings.

author: AVGresponding
author_rank: Super Contributor
timestamp: June 09, 2020, 06:37:45 pm
content: Quote from: SparkyFX on June 09, 2020, 08:47:49 amYes, but giant chemical companies like 3M can't make money from that.

author: GregDunn
author_rank: Frequent Contributor
timestamp: June 10, 2020, 11:21:49 pm
content: OK, folks; thanks. That seems definitive enough, from several different countries.The new roof we're contemplating has several other advantages which are not in question, so I think we'll go along assuming there isn't a ridiculous price premium...

author: rrinker
author_rank: Super Contributor
timestamp: June 12, 2020, 03:35:08 pm
content: Hopefully the next time the roof needs replacing, they are properly disposed of so as to not release all the entrapped pollutants.

author: TimFox
author_rank: Super Contributor
timestamp: June 12, 2020, 07:25:16 pm
content: Some automobile companies (including Volvo) tried using a platinum-coated catalytic radiator to absorb pollutants, including ozone and CO, as air was sucked through the radiator at an appropriate altitude for other cars' exhaust fumes. The motivation was to get pollution credits, especially if it could be shown that the catalyst absorbed more garbage than the car emitted. The idea seems to have died. Seehttps://jalopnik.com/how-volvo-once-used-a-catalyst-coated-radiator-to-remov-1831438959