Title

An Ammonia-Borane Based Hydrogen Storage System For Portable Applications

Abstract

Ammonia-borane (AB) complex is a chemical hydride with very high hydrogen content (19.6 wt%). In this paper, we present a new process for generating hydrogen via hydrolysis of AB, which yields 3 moles of H2 and one mole of NH3. Phosphoric acid was used as a sequestering agent due to its superior performance in removing NH3 and minimum pull down on the system-level gravimetric hydrogen storage density. Hydrogen was generated by reacting an aqueous solution, containing Na3Cl6Rh catalyst and phosphoric acid, at a rate of 0.025 mL/min isothermally at 70 C with AB. Rate of hydrogen evolution tripled when the injection rate was increased to 0.050 mL/min. Hydrogen production rates were essentially unchanged when the hydrogen generator operated adiabatically. When AB complex, in the form of pellets or tablets, were added periodically, one tablet at a time, to the catalytic solution at 80 C, much higher rate of H2 production was observed.

Publication Date

12-1-2006

Publication Title

ACS National Meeting Book of Abstracts

Volume

232

Number of Pages

-

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

Socpus ID

34047257867 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/34047257867

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