Laigret project: documentation

[Christophe]

Yes there is an analysis error, at 500 ° C it is surely not bacteria ...

It is rather pyrolysis, especially that 3 pages above speak of 37 ° C for Perfringens ...

If not stupid question: in the 1st report they evoke an "indirect" process for the synthesis of petroleum which would be easier than bacterial fermentation or other pyrolysis ("direct" process) ... what is this or these types of processes? ??

[Remundo]

I think it's the I-POD: the international petrol on demand

[Christophe]

Hey, seriously! Aren't you going to do your Recy there?

[Remundo]

I do well-spelled "Recy", that's better

Otherwise, I don't know Christophe, and yes, it happens to me. Ask the Loulous who wrote the text

[Remundo]

The production of CH3OH, methanol that is directly combustible in gasoline engines and liquid at room temperature is an "old process" from CO / H2.

It was the Germans from BASF who were forerunners and there is another way of producing methanol from methane ...

We could also consider putting methanogenic bacteria in series with this process ...

My preference nevertheless goes to direct synthesis CO + 2 H2.

Here are 2 links:
History / CH3OH processes + catalysts

and the wiki
http://fr.wikipedia.org/wiki/M%C3%A9thanol

[Christophe]

A) Google Book is still very inflated to copy / paste whole books ... finally ...

Well I looked at the 2nd doc, although it affects Laigret very little, it is very complementary to the 1st: it is more interested in the chemistry and process aspect of biogas while the 1st is more interested in type of process level.

This is good, it gives very good basic knowledge on biogas.

B) By the way, speaking of anaerobic digestion, that's good, because I signed up for the Roberval competition and this year I will have to analyze this:



From what I saw it's "heavy" (the price gives an idea of ​​the quality of the content)!
There is the summary on this link: http://www.lavoisier.fr/notice/fr2743010360.html

[Remundo]

Mouce, maybe Google Book has to pay something ... The pb of this kind of book is that they are very expensive and not widely distributed (hyperpointed). it looks like a beautiful book

By the way, Perfringens produces methane?

[Christophe]

A) No Google Book does not pay anything: their policy is as follows "we copy everything we want until someone pisses us off" ... in other words the small publishers have it deeply ... and the others as well ... at least the French. In the USA it may be a little different.

Youtube and Daily et Cie also base their "profitability" on the same principle: 60 to 70% of the content does not respect copyright ...

B) Perfringens produces, at the start (of the reaction), a mixture of methane and very pure H2.

Synthesis of the article:
- Precise date of the Laigret experiment: June 15, 1947
- A new name appears: Mr Laugrier, rector of the Academy of Algiers.
- The strain is identical to the other articles
- Biomethane is not ONLY cellulosic origin! (important)
- There is no CO in methane Laigret (unlike conventional biogas)
- Oleic acid gives the best results
- Analyzes made by the Department of Mines in July 1947! Documentation to look for!
- 1 g soap = 1cm3 oil (in another article we had 4 gram for 3 cm3)
- Temporal aspect: the transformation is very fast (unlike mineral oil from which stems the popular false belief that it takes millions of years for oil ...!). Some oils can therefore be synthesized very quickly!
- And finally, and that is what brings a lot of hope to the project: Laigret was discreet with regard to the Press (therefore the sources of information that we have for the moment) on many points for economic reasons. Which probably means that some (most interesting?) Results have never been published.

https://www.econologie.com/documentation ... -3942.html

[Christophe]

An article published in Biodiesel magazine from March 2009.

Ecofasa, a Spanish company, produces biodiesel by bacterial action from waste. "Ecofa" process

Apparently bacteria produce fatty acids from household waste, so it could perhaps be a step upstream of the Laigret Process!

[Remundo]

Interesting...

There is yet another sector, direct liquefaction of biomass. Still very experimental too.

This is gentle heating (approximately 350 °) under high pressure (200 Bar), possibly in an aqueous medium.

The result is a heavy oil and various gases (CO2, CO, H2O).

See this research

In fact currently, it is gasification followed by a Fischer Tropsch synthesis or methanol which is the most "advanced", so to speak ...

@+