Method for synthesising organic molecules
Disclosed is a method for synthesising organic molecules from carbon-containing sources and dihydrogen, as well as a device for implementing the method. The method can make use of carbon-containing sources and/or dihydrogen from renewable resources.
1. A process for synthesising organic molecules selected from the group consisting of formate, acetate and lactate comprising contacting, in an aqueous liquid medium under anaerobic conditions, at least one source of anaerobic microorganisms, capable of catalysing the reduction of carbon molecules by dihydrogen, with at least one dihydrogen stream, in the presence of at least one carbon source and at least one solid catalyst, wherein the solid catalyst is a bulk or supported metal catalyst.
2. The process according to claim 1 , wherein all or part of the dihydrogen stream comes from a microbial electrolysis comprising the oxidation of organic waste, and/or an anaerobic digestion of organic waste, and/or water electrolysis.
3. The process according to claim 1 , wherein the at least one carbon source is
a. either in gas form and chosen from carbon monoxide and carbon dioxide,
b. or in solution and chosen from solutions comprising carbonate, C 1 -C 8 carboxylates, sugars, lactate, alone or in mixture.
4. The process according to claim 1 , wherein the at least one solid catalyst is an electrically conducting or semi-conductor catalyst.
5. The process according to claim 1 , wherein the at least one solid catalyst is chosen from a hydrogenation catalyst or a catalyst comprising carbon materials, or a mixture thereof.
6. The process according to claim 1 , wherein said metal catalyst comprises at least one metal chosen from iron, ruthenium, cobalt, nickel, chromium, platinum, palladium, rhodium, or a mixture of the same or of their oxides.
7. The process according to claim 6 , wherein said metal catalyst is selected from the group consisting of iron, cobalt, nickel and ruthenium.
8. The process according to claim 1 , wherein the solid catalyst is in the form of a grid, a plate or a three-dimensional or porous structure.
9. The process according to claim 4 , wherein said catalyst is a metal membrane.
10. The process according to claim 1 , wherein the solid catalyst is used as a support for the at least one source of microorganisms.
11. The process according to claim 1 , wherein the source of microorganisms is chosen from the group comprising pure cultures, co-cultures, environmental inocula and complex microbial consortia.
12. The process according to claim 2 , wherein the at least one carbon source is
a. either in gas form and chosen from carbon monoxide and carbon dioxide,
b. or in solution and chosen from solutions comprising carbonate, C 1 -C 8 carboxylates, sugars, lactate, alone or in mixture.
13. The process according to claim 2 , wherein the at least one solid catalyst is an electrically conducting or semi-conductor catalyst.
14. The process according to claim 3 , wherein the at least one solid catalyst is an electrically conducting or semi-conductor catalyst.
15. The process according to claim 2 , wherein the at least one solid catalyst is chosen from a hydrogenation catalyst or a catalyst comprising carbon materials, or a mixture thereof.
16. The process according to claim 3 , wherein the at least one solid catalyst is chosen from a hydrogenation catalyst or a catalyst comprising carbon materials, or a mixture thereof.
17. The process according to claim 4 , wherein the at least one solid catalyst is chosen from a hydrogenation catalyst or a catalyst comprising carbon materials, or a mixture thereof.
18. The process according to claim 6 , wherein said metal catalyst comprises iron.