Method and apparatus for dehydrogenating a hydrogen carrier medium
A method for dehydrogenating a hydrogen carrier medium comprises the method steps of providing a metal-containing catalyst material, an at least partially loaded hydrogen carrier medium, a metal-free reaction accelerator substance, transferring hydrogen from the hydrogen carrier medium to the reaction accelerator substance and releasing hydrogen gas from the reaction accelerator substance.
1. A method for dehydrogenating a hydrogen carrier medium, the method comprising the method steps of:
providing:
a metal-containing catalyst material;
an at least partially loaded hydrogen carrier medium, and
a metal-free reaction accelerator substance;
transferring hydrogen from the hydrogen carrier medium to the reaction accelerator substance; and
releasing hydrogen gas from the reaction accelerator substance.
2. The method as claimed in claim 1 , further comprising providing a reaction pressure of from 0.001 bar to 50 bar.
3. The method as claimed in claim 1 , further comprising providing a reaction temperature of from 25° C. to 400° C.
4. The method as claimed in claim 1 , wherein the releasing of hydrogen gas is with a release rate of at least 10 standard liters of hydrogen per liter of catalyst volume and per minute at a reaction temperature of less than 250° C.
5. The method as claimed in claim 1 , wherein reaction accelerator substance has at least one functional group which contains at least one of oxygen and nitrogen.
6. The method as claimed in claim 1 , wherein the reaction accelerator substance in the hydrogen-enriched form comprises secondary alcohols of the form
7. The method as claimed in claim 1 , wherein the reaction accelerator substance in the hydrogen-enriched form comprises at least one of oligovinyl alcohols of the form
and polyvinyl alcohols of the form
8. The method as claimed in claim 1 , wherein the reaction accelerator substance in the hydrogen-enriched form comprises secondary amines of the form
9. The method as claimed in claim 1 , wherein the reaction accelerator substance in the hydrogen-enriched form comprises at least one of oligovinylamines and polyvinylamines of the form
10. The method as claimed in claim 1 , wherein reaction accelerator substance in the hydrogen-enriched form comprises a dehydrogenatable heteroalicyclic compound of the form of one of
11. The method as claimed in claim 1 , wherein reaction accelerator substance has a vapor pressure (p R ) which is greater than the vapor pressure (p W ) of the hydrogen carrier medium, wherein p R >1.5 p W .
12. The method as claimed in claim 1 , wherein the reaction accelerator substance has a vapor pressure (p R ) which is lower than the vapor pressure (p W ) of the hydrogen carrier medium, wherein p R <0.8 p W .
13. The method as claimed in claim 1 , wherein the reaction accelerator substance has a miscibility gap with the hydrogen carrier medium at a temperature of at most 50° C.
14. The method as claimed in claim 1 , wherein the reaction accelerator substance is present as a solid.
15. An apparatus for dehydrogenating a hydrogen carrier medium, by providing: a metal-containing catalyst material; an at least partially loaded hydrogen carrier medium, and a metal-free reaction accelerator substance; transferring hydrogen from the hydrogen carrier medium to the reaction accelerator substance; and releasing hydrogen gas from the reaction accelerator substance, the apparatus comprising:
at least one reaction vessel; and
a contacting unit arranged in the at least one reaction vessel.
16. The method as claimed in claim 1 , further comprising providing a reaction pressure of less than 0.1 bar.
17. The method as claimed claim 1 , further comprising providing a reaction temperature of less than 100° C.
18. The method as claimed in claim 1 , wherein the catalyst material has been deposited directly onto the reaction accelerator substance.