Title: Hydrogen storage by reversible hydrogenation of pi-conjugated substrates

Abstract

Processes are provided for the storage and release of hydrogen by means of a substantially reversible catalytic hydrogenation of extended pi-conjugated substrates which include large polycyclic aromatic hydrocarbons, polycyclic aromatic hydrocarbons with nitrogen heteroatoms, polycyclic aromatic hydrocarbons with oxygen heteroatoms, polycyclic aromatic hydrocarbons with alkyl, alkoxy, nitrile, ketone, ether or polyether substituents, pi-conjugated molecules comprising 5 membered rings, pi-conjugated molecules comprising six and five membered rings with nitrogen or oxygen hetero atoms, and extended pi-conjugated organic polymers. The hydrogen, contained in the at least partially hydrogenated form of the extended pi-conjugated system, can be facilely released for use by a catalytic dehydrogenation of the latter in the presence of a dehydrogenation catalyst which can be effected by lowering the hydrogen gas pressure, generally to pressures greater than 0.1 bar or raising the temperature to less than 250° C. or less, or by a combination of these two process parameters.

Inventors:

Pez, Guido Peter; Scott, Aaron Raymond; Cooper, Alan Charles; Cheng, Hansong

Issue Date:

2008-09-30

Research Org.:

Air Products and Chemicals, Inc., Allentown, PA (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1531566

Patent Number(s):

7,429,372

Application Number:

10/833,484

Assignee:

Air Products and Chemicals, Inc. (Allentown, PA)

DOE Contract Number:  

FC36-04GO14006

Resource Type:

Patent

Resource Relation:

Patent File Date: 2004-04-27

Country of Publication:

United States

Language:

English

Subject:

08 HYDROGEN; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY