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US 2022/0024758 A1Published application
Reversible liquid organic system, method and process for loading and discharging hydrogen based on n-heterocycles
AssigneeYeda Research and Development Co. Ltd.
InventorsDavid MILSTEIN, Yinjun XIE
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Abstract
The present invention provides a system, a process and a method of storing hydrogen (H2) and releasing it on demand, comprising and making use of N-heterocycles as liquid organic hydrogen carriers (LOHCs).
Claims37
A reversible hydrogen loading and discharging system comprising:
- at least one N-heterocycle;
- one transition metal catalyst, or transition metal catalyst precursor;
- and a catalytic amount of at least one weak acid, wherein the system does not comprise any solvent and is functional under mild temperatures and pressures.
22-23. (canceled)
A reversible process for the storage and release of hydrogen (H2) upon demand comprising the steps of:
- a. when hydrogen storage is desired, reacting a substituted or unsubstituted pyridine derivative with molecular hydrogen (H2) in the presence of a first catalyst, under conditions sufficient to generate a substituted or unsubstituted piperidine derivative;
- and
- b. when hydrogen release is desired, reacting a substituted or unsubstituted piperidine derivative with a second catalyst and a catalytic amount of at least one weak acid, under conditions sufficient to release hydrogen, thereby generating the corresponding substituted or unsubstituted pyridine derivative and molecular hydrogen (H2);
- wherein the first and the second catalyst are the same, the process does not comprise any solvent, and the process is carried out under mild temperatures and hydrogen pressures.
1 more element
(canceled)
Dependencies are inferred from the claim text.