I have to give you some chit @sean donato .. it's Alkylate. Alkyd refers to paint!
Octane question
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We have a railroad siding right behind the building I work out of. In the winter the leave those damn trains idling all night and the smell is terrible.
You'd be surprised how much aromatics are in gasoline.
Benzene is quite toxic, the ones with alkyl-side chains much less so. EPA primarily is concerned with benzene. I've seen no evidence aromatics are hard on fuel system parts compared to saturated hydrocarbon components.
I used to outfit organic chemistry labs with proper tubing for transfer of all sorts of organics, some halogenated, and have observed the effect of solvents on various tubings.
We used to purify benzene to remove thiophene. Extract with concentrated sulfuric acid then distill from calcium hydride.
Where are you located?
Airports here have not replaced 100LL with unleaded yet.
That stuff take my wind away like instantly every time I get a good breath of it. I try like hell to stay away. It will make you real sick if your truck leaks fumes in the cabin all the time.
No, I wouldn't. I see the analysis every day at work. There is very little.
And yes, the EPA was primarily concerned with Benzene due to it being a known carcinogen. However the refinery units that remove benzene also remove the other aromatics.
Aromatics being tough on rubbers and plastics is well documented.
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Gasoline of all sorts contain aromatics. I've done GC/MS analyses that identified and quantified each one, even separated the isomers of xylenes (dimethyl-benzenes) and mesitylenes (trimethl-benzenes). Have you?
It is not practical to remove aromatics by distillations from crude. And not economically feasible by chemical means.
And then there is winter gas! I gives people fits every spring on the first hot day when their saws vapor lock ! Had that **** blow right up in my face when opening the cap. Most people dont even know about it.
Google sucks and supports NWO, use Duck Duck Go
I wonder how much better it really is?
So explain how refineries remove aromatics from the stream of saturated hydrocarbons with near/the same boiling points? As a chemist I'd like to know, IF you know. For instance iso-octane bp = 100 oC and toluene bp = 111 oC. This is not a trivial separation in the laboratory to get close to near 100% separation
I have done all sorts of distillations with all sorts of sophisticated laboratory equipment, including vacuum/reduced pressure and steam distillations. This includes purifying novel new compounds created in the laboratory.
Google is evil personified. This track you and sell the information to the highest bidders.
ClimberBusinessman
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Use the higher-octane fuel and put stabilizer such as Stabil that has anti-ethanol properties in it.
There are a variety of ways. Most involve catalysts and the introduction of hydrogen. It all depends on how complex the refinery is. Some just strip off the C6-C8's right off their main column and sell the results to chemical companies.
I work at a refinery and see the analysis every day. I'm not guessing.
Distillation is where refining starts and is a small part of the overall refinery... again, I am not guessing.
One of the reasons ethanol use took off was it allowed refiners to lower aromatic content. Aromatics are high octane streams and in the absence of lead use was a way to crank out decent octane fuel. Ethanol replaced thse aromatics as a high octane stream. Now the refiners can sell the aromatics to Chem plants which bring good money. Most of the really big refineries have Chem plants attached to them so they just pipe them over to the Chem side.
At one time BTX was between 20 and 50% of the gasoline pool. It's well under 10% in most cases and often below 5% with Benzene levels below .6%.
These figures are for RFG. Areas not mandated to use RFG may be different.
Nothing really makes ethanol better although Stabil will prolong storage time.
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A dash of vermouth usually helps....
So what are the percentages of xylenes and toluene in gasoline you produce? I'll have to dig out old GC/MS chromatograms to give you real numbers. And I'll add, there still is detectable amounts of benzene.
Ethanol/oxygenated fuels were primarily introduced to reduce emissions (remember MTBE? a carcinogen that got in ground water from spills), not to boost octane. In fact it is not economical to obtain ethanol from corn without government subsidies. If the government subsidies were cut off, E10 would disappear.
Farmland should be used to grow food for people and animals. Part of the cost of food is directly related to the use of farmland/food crops for E10.
Years ago a property we logged at the front gate used to be a dog it's face was black from diesel soot.
It would sit at the gate all day waiting for a diesel ute to pull up, it would run out and stick it's nose right up the exhaust it must of been addicted to diesel fumes??. True story that dog was messed up.
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Dead nuts on!
I switched to Avgas a few years ago for all my 2-cycle tools. Zero problems since with gummed up carburetors and cracked plastic fuel lines. Some things sit for months and start with a couple pulls. Ethanol fuel used to result in a lot of clogged carburetors. Never will use ethanol fuel again.
