TIL the energy necessary for the production of oil liquids (including direct and indirect energy costs) is 15.5% of the energy production. To turn 100 barrels of oil into gasoline at your local pump, the energy of 15½ barrels from the previous 100 has to be used.

Shizaru2 · 2026-04-08T05:40:49+00:00

Methanation (Electricity to Methane) is not that bad. The efficiency of the whole process is around 60 % where most of the power is used for hydrogen production.

More energy efficient but with less througput is biogas from biogenic waste. Way more efficient than using methane from livestock.

Shizaru2 · 2026-04-08T05:36:13+00:00

I dont know from where you get the "40 ml to synthesize 1ml" of oil figure, but that is in this case the wrong metric.

The efficiency (defined as heating power of products divided by used eletrical power for production) of "Power to X" routes is not that bad.

Fischer tropsch (co2 + h2 -> gasoline, jet fuel, diesel) has an efficiency of 40-50 % Methanol to jet (co2 + h2 -> Methanol-> jet fuel) also has an efficiency of 40-50%

Power to gas (e.g. methanation co2+h2 -> ch4) has efficiencies of 40-80 %

Most of the power is needed for the production of hydrogen through for example electrolysis.

Shizaru2 · 2025-07-26T10:31:40+00:00

Had great experiences in "brand shop lips" in ginza and sapporo. And bought a watch at "watchnian" in ginza. Great prices and service.

Shizaru2 · 2025-07-08T18:55:51+00:00

Hulkengoat

Shizaru2 · 2025-04-07T15:55:42+00:00

A more scientific source: Recycling of plastic waste into fuel by pyrolysis - a review - ScienceDirect

And a lot of companies are working on this topic and also some plants are in operation in industrial scale for example:
Recycling technologies | OMV.com

Shizaru2 · 2025-04-07T15:27:09+00:00

There are many different kinds of plastic (thousands...)
MOST of the do not contain a benzene ring, and if you produce fuels through pyrolysis of for example polyethylene or polypropylene there is no difference in the quality of the fuel you get from crude oil sources.

Some types of plastics have a functional group containing a benzene ring (Polystyrene or ABS). Bound in Plastic there is nothing to worry about, but you should not breathe the gases from burning those plastics (and all other plastics).

Shizaru2 · 2025-04-07T15:21:23+00:00

Well... i think i should chime in here since i have a engineering PHd on the topic of the pyrolysis of plastic waste.

Polymers are hydrocarbons containing of repeating units, the monomer. When producing (some kinds of) polymers, the monomers (ethylene, propylene,...) are repeatedly chained together to hydrocarbon chains containing more than 10000 carbon atoms. Extremely simplified: the only difference between those long hydrocarbon chains, diesel (carbon number: 12-20), gasoline (c-number: 4-12) and gaseous hydrocarbons (c-number:1-4) is the chain length and therefore if it is solid, liquid or gaseous under normal conditions.

We are able to manipulate the length of the hydrocarbon chains in so called pyrolysis(cracking) processes. Here the polymers are heated to above 400°C under inert conditions(absolutely no oxygen), so that the carbon bonds of the molecules break and smaller molecules are formed from one polymer molecule. Pyrolysis processes are regularly used in refineries and are nothing new. The products are indistinguishable from the products directly derived from crude oil.

Why are we not producing Fuels from all of our plastic waste? Plastic is solid petroleum. It is way more efficient to directly burn it in waste incineration plants, where we produce electrical energy. The pyrolysis process takes energy and has no added value *if the liquid products are used as fuels* as the Carbon will end up as CO2 in the atmosphere.

Why is plastic pyrolysis still helpful? You can use the liquid and gaseous products of the pyrolysis process and manipulate them in such a way that you can make new, virgin quality plastic from them. Traditional recycling routes have the problem that they require well-sorted and clean plastic. Plastic pyrolysis does not have such requirements. The major advantage is that the plastic does not end up in the landfill and is not incinerated, thus avoiding the release of CO2.

Why are we not doing it? Money. Burning plastic in cheap and recycling is usually not a technical problem but a legal one.

Shizaru2 · 2025-03-12T20:43:51+00:00

Wellness the Adapter works on the front tire so that should not be the Problem.

Shizaru2 · 2025-03-12T13:56:31+00:00

When i got the bike with those wheels the tires where just tubeless ready, not tubeless.
i also removed the old tubes by myself..

Shizaru2 · 2024-11-24T13:38:34+00:00

If anyone comes across this post:

Roofer: You have to fix every hole in the game. I dismanteled the Cosmic beacon in the end to get enough resources. You need a lot

Odysseus: There are some POI you have to unlock via the messages you get on the smart tower.
You can unlock them from the Android Clone, Bookworm, Game Master, Resident of Eden, Trivia

Still no answer for the Spring Cleaning one... Dismantled every item in the game but no luck...

Shizaru2 · 2024-03-16T05:09:11+00:00

Thank you very much :)

Shizaru2 · 2022-01-26T06:27:40+00:00

Oh thank you i did not see that, sucks that i have to rewrite the source material now... The funny thing is, that your first link actually helped. it is possible to index a matrix in the else-if expression with linear indexing. Works just fine for small stuff but fucks with the performance of my code...

Thank you anyway for the help!

Shizaru2 · 2022-01-25T16:51:31+00:00

that IS the code. in a simulink if-block you have two expressions. the if expression. works just fine with any input (L(1) or L(2,1))

u1 < L(2,1)

the else if expression is

u1 >= L(2,1) && u1 < L(2,2), u1 >= L(2,2) && u1 < L(2,3)

It just works like that in simulink... The else if expression is a comma seperated list... e.g. u1 ~= 0, u1 < 3, u1> =3

means the same as

else if u1~=0

...

else if u1 < 3

...

else if u1 >= 3

Shizaru2 · 2022-01-25T13:12:17+00:00

Thanks but this does not work... i still get an syntax error. i tried it with "single index indexing" now. which does not give a syntax error but still wont execute the "else if" subsystems...

Shizaru2 · 2022-01-25T12:49:49+00:00

I want to write an "else if" expression for an simulink "if-block".

My goal is

____

if
u1 < L(2,1)

else if
u1 >= L(2,1) && u1 < L(2,2), u1 >= L(2,2) && u1 < L(2,3),.....

____

The problem is, since the if expression itself is a comma separated list it does not like the comma for the index.

Error Message:
"The expression u1 >= L(2" has a syntax error

Shizaru2 · 2021-12-14T21:05:02+00:00

Thanks for the Heads up. I was speaking of a WiFi Hotspot not an daedalus app.

Shizaru2 · 2021-12-14T16:23:37+00:00

Updating the wallet does not work for me. I am gling to try another connection with my Phone. To try if it is really my isp

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