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None of the credible end products are good, though. Perchlorate itself is at least somewhat toxic. Chlorate and chlorite are, too, and efforts are made to redu
by amluto 3y ago
None of the credible end products are good, though.
Perchlorate itself is at least somewhat toxic. Chlorate and chlorite are, too, and efforts are made to reduce the amount in drinking water.
Chloride is relatively innocuous (people need quite a bit to be healthy), although it’s not great when it gets on metals due to corrosion issues. Bit chloride doesn’t exist by itself — it needs to be balanced by a positive charge somewhere.
So that leaves HCl? Hydrogen chloride gas is fairly nasty.
The best outcome I can think of for automotive use is to carry around a bunch of calcium carbonate, AdBlue style, and try to arrange for the end products to be CaCl and CO2, and to declare that this is somehow a good thing because the cars all emit a steady drip drip drip of deicing fluid.
- perihelions 3y agoThe point is there's supposedly *no* chlorine-containing species in the exhaust. They stay behind in the liquid phase, in a sort of "catalytic" role. - "at the anode, the perchlorate gets oxidized to chlorate and chlorite ions, but none of that shows up in the gas phase"
- phyzome 3y agoIf truly none of it ends up the gas, that's cool. But I don't quite believe it, because it's happening in the context of combustion. Maybe if you route the vapor away from the liquid before burning it? There are other questions: What's the toxicity in a spill? What does refilling look like? It's an interesting piece of work, no doubt, but this is nothing that looks production-ready. I don't have access to the original paper (even through SciHub) and it might answer some of these questions.
- Scoundreller 3y agoTerrible for surrounding vegetation though