Recycling of synthetic fuel CO2?

crude vegetable oil, diester, bio-ethanol or other biofuels, or fuel of vegetable origin ...
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zeenenergy
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Re:




by zeenenergy » 18/05/21, 21:02

Christophe wrote:
chatelot16 wrote:catalyst energy = 0


False, an enzyme can bring biochemical energy. This is why it breaks down during the reactions. And enzymes is super expensive, it is THE major problem of biofuels 2ieme generation (lignocellulosic = it takes a lot of energy to turn the cellulose or lignite into sugars).

The trick of carbon science would be to use doped "super enzymes" ... which wear out much less quickly.

Well if you do not read English I will translate the passage of the most important page ... but it's still pretty light!



there are stable metalloenzyme catalysts that convert water and CO2 into Ethanol 8)

see the work of Marc Fontecave professor at the Collège de France : Arrow: https://www.college-de-france.fr/site/m ... course.htm
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Re: Recycling CO2 into synthetic fuel?




by NCSH » 17/11/21, 20:04

Hello,
Rather than recycling CO2 of fossil origin for a second use which has the advantage of being inexpensive but often accompanied by fine particles that must be filtered, it is preferable to start from CO2 of atmospheric origin by using processes known as Direct Capture in the Atmosphere or DAC for Anglo-Saxons. The costs envisaged for the start of industrialization from 2025/2030 are of the order of 100 to 250 € / tonne, evolving towards 50 in 2050, which would make it possible to massively produce all kinds of synthetic hydrocarbons (including ethanol, methanol and its derivatives) at reasonable costs. In Europe, we have the Zurich-based start-up Climeworks, which has just completed its project in Iceland to bury CO2 in stable geological layers (Orca).
To produce green hydrogen at a lower cost, it turns out that solar energy is unbeatable, in the intertropical band at 1.5 € / kg from 2025/2030 and possibly at 0.6 / 0.75 in 2050.
All these cost evaluations have been made public by the scientific publications of the Technical University of Lappeenranta in recent years since 2016. Whatever the transformation processes to obtain the hydrocarbon molecules (algae, photocatalysis,
electrophotocatalysis, electrocatalysis, ... or even the old recipes of FT thermochemistry), it is at the initiative of the Germans who are the main leaders in trying to officially legalize the deduction of CO with the European authorities2 non-fossil atmospheric according to various principles, including that of the circular economy ...

March 2019 - Cost - 1-s2.0-S0959652619307772-main.pdf
DAC cost evolution up to 2050
(2.12 million) Downloaded times 6070
Sept 2021 - Solar Hydrogen - solr.202100487.pdf
Solar Hydrogen cost evolution up to 2050
(1.78 million) Downloaded times 11838


To discover the parallel universe of non-fossil synthetic fuels, take the time to browse (15 min) the NCSH website:
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Re: Recycling CO2 into synthetic fuel?




by NCSH » 12/10/22, 10:35

Hello,

Less than a year later, it becomes official, the German energy agency DENA publishes a recent report which confirms and develops this argument of moderate cost of synthetic and non-fossil carbon energy carriers obtained from renewable electrical energy and CO2 from the atmosphere or DAC: €110 to €120/MWhth in 2030 and €64/MWhthterm in 2050 for imports ...
Note that 3 of the 5 authors of this study are from the Technical University of Lappeenranta!

Sept 2022: to be found on the DENA website: dena.de/en/newsroom/publication-detail/pub/study-e-kerosene-for-commercial-aviation/

It seems that the link does not work, nor does the attachment for pdf file! Help!
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Re: Recycling CO2 into synthetic fuel?




by Remundo » 12/10/22, 10:40

https://www.dena.de/en/newsroom/publica ... -aviation/

64 € / MWhth, it's a bit obscure...

let's say that a liter of gasoline is 10 thermal kWh...

that would put the liter at 64 € x 10 kWh / 1000 kWh = 0.64 €/L

If it's really doable, then go all out. : Idea:

the Germans are indeed considering e-fuels and other biofuels.

They are quite right!
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Re: Recycling CO2 into synthetic fuel?




by NCSH » 12/10/22, 14:17

Hello Remundo,

The Germans don't just think, but above all for ten years they have spent a few hundred million euros to achieve the current results: the industrial stage!
Indeed, the European Parliament voted on September 14 a quota of 5.7% of non-fossil and non-electric energies (in direct use) dedicated to the transport sector by 2030, ie around 10 to 15 Mtoe/year. This concerns H2, NH3 and non-fossil synthetic carbon energies.

From now on, it will be a question of deployment!

To be found on the news website Euractiv.com, section Transport/section/alternatives-renewable-fuel/news/... on September 15th.

Sorry, but it still gets stuck, I can't get the link functions window to work...
There is something wrong.
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Re: Recycling CO2 into synthetic fuel?




by sicetaitsimple » 12/10/22, 14:25

NCSH wrote:Sorry, but it still gets stuck, I can't get the link functions window to work...
There is something wrong.


If it's just a link, just copy it and paste it into your post.

The "attachments" function is used, as its name suggests, to attach files (documents, images, etc.) to your post.
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Re: Recycling CO2 into synthetic fuel?




by NCSH » 12/10/22, 14:32

So to send a link to a web page, you don't go through the "chainon"?
Which one doesn't work anymore when I tried to send a pdf file?

https://www.euractiv.com/section/altern ... on-target/

Will this work?
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Re: Recycling CO2 into synthetic fuel?




by gegyx » 12/10/22, 14:43

Yes, it works. I had just found it but not by your indicated track path. :D

For the link => copy the link address in the address bar of your browser.

For the pdf => must insert the doc as attachments (at the bottom of the page).
you have to click on "attachments", then on "add files" (from your computer)...
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Re: Recycling CO2 into synthetic fuel?




by NCSH » 12/10/22, 14:46

So it works!

Concerning the costs of non-fossil synthetic energies:

No, it blocks. When I paste, nothing happens, although the small window is blue, the bar flashes!
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Re: Recycling CO2 into synthetic fuel?




by sicetaitsimple » 12/10/22, 14:59

NCSH wrote:No, it blocks. When I paste, nothing happens, although the small window is blue, the bar flashes!


Click on "attachments", then "add files" which normally directs you to your hard disk, you select your file, then "open", then finally "insert in the line". Normally it works, unless your file format is not recognized.
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