🧵 Untitled Thread
Anonymous at Fri, 22 Mar 2024 02:34:40 UTC No. 16090466
interested in homemade fuel. i want to know how i can test the produced synfuel to see what it actually is, the octane/cetane, purity, etc.
these garage pyrolyzers and gassifiers are very impricise and create very different products based on temperature and even stuff like the type of wood used.
also how sensitive are engines to octane or impurities? because it does me no good if the fuel destroys my engine in 100 miles or something.
and what about detergents or other additives? i have no idea what they put in fuel to make it run cleaner/better.
Anonymous at Fri, 22 Mar 2024 03:46:41 UTC No. 16090529
>>16090466
You'll never get pure octane or whatever, all fuel comes in fractions characterized by a range of boiling points.
What you really have to watch out for is unsaturated carbons, which will immediately turn into tar when you heat them. I think they use Raney Nickel+H2 to reduce these. Also watch out for benzene and nitrate/sulfate content. I think benzene also gets eaten by Raney Ni, and the inorganics will have to be removed with solid or liquid scrubbers somehow
And of course, don't forget America's favorite anti-knock agent
Anonymous at Fri, 22 Mar 2024 05:06:47 UTC No. 16090597
>>16090529
how do gas companies control the octane they produce then?
Anonymous at Sat, 23 Mar 2024 00:09:29 UTC No. 16091936
can i get some more input
Anonymous at Sat, 23 Mar 2024 01:18:26 UTC No. 16092007
is biodesel an option for you? Wont' work in the winter but easy to make (lye and used fryer oil).
also, the answer is ethanol, they put that in fuel, that's their "magic spice" ingredient
Anonymous at Sat, 23 Mar 2024 02:09:34 UTC No. 16092050
>>16092007
i assumed fuel from pyrolysis was biofuel but apparently not.
and no it gets cold here.
can you add ethanol to diesel? i still need a way to meafure the fuel's performance.
Anonymous at Sat, 23 Mar 2024 05:03:39 UTC No. 16092168
It all depends on how complicated you wanna get. With enough process steps you can do pretty much anything, including produce pure octane from just about any carbon feedstock, if that's your goal. The art of chemical engineering is figuring out where the sweet spot lies for your application. Ideally you want just enough reaction steps to get the job done and no more.
But to answer your question a little more directly, there's three main reactions that are done in fuel refining: condensation, which glues carbons together, cracking, which splits them apart, and distillation, which separates mixtures. More complicated systems are built by nesting loops of these simple building blocks.
So to give you more info, we need to know your application and feedstock. If you're planning on using pyrolized garbage to fuel a gas car, that will be different from using methane to fuel diesel truck.
Anonymous at Sat, 23 Mar 2024 05:40:34 UTC No. 16092184
>>16092168
i'm interested in having a pyrolyzer (as i understand it, a wood gasifier and a pyrolyzer are the same thing) and a methane digester.
the goal is to end up with gasoline and diesel. what do i need to make diesel out of methane?
Anonymous at Sat, 23 Mar 2024 07:05:28 UTC No. 16092225
>>16092215
the army IED manual is free, i don't need to ask 4chan.
Anonymous at Sat, 23 Mar 2024 17:44:06 UTC No. 16092822
>>16090597
The octane rating has to do with engine knock. It doesn't have anything to do with a specific chemical
Anonymous at Sat, 23 Mar 2024 17:45:52 UTC No. 16092827
>>16092050
It's a biofuel, but it's not like biodiesel. It's syngas
Anonymous at Sat, 23 Mar 2024 18:29:05 UTC No. 16092897
>>16092215
retard
the types of fuels OP is talking about don't burn fast enough to make a powerful explosion
Anonymous at Sat, 23 Mar 2024 19:46:56 UTC No. 16093010
>>16092184
You run some percentage of methane in a diesel engine directly. Mix it in with the air intake. Other flammable gasses work well too; monoxides, ethane, propane, butane etc. You then lower the amount of diesel fuel needed, though some is recommended as the diesel still serves a lubricating function perhaps 20-30%. This is a common cng conversion for diesel. Some even switch to 100% lgn conversions. Gasoline powered vehicles can switch to 100% flammable gas without problems, unless they are modern and the computers freak out.
Natural gas is about $1 per gasoline gallon equivalent (GGE) piped to my house. To buy cng at a filling station near me it's about $3 per GGE, someone's making bank, used to cost less than half that of gasoline. You can get at home pumps that jack the pressure up to 3,600 psi, but to get one you have to pay like $5,000.
Propane is currently $2.578 per gallon, but you have to multiply by 1.32 to convert to the energy density of gasoline making it $3.40 per gge.
Anonymous at Sat, 23 Mar 2024 19:55:22 UTC No. 16093026
>>16093010
they price this shit specifically to fight our form of autism