Effect of additives on the thermolysis of ammonia borane

David J. Heldebrant, Tom Autrey, John Linehan, Donald M. Camaioni, Scot D. Rassat, Feng Zheng

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Ammonia borane (AB) is an attractive hydrogen storage material with high gravimetric and volumetric density of hydrogen. The thermolysis of solid ammonia borane follows sigmoidal kinetics with an "induction period" prior to rapid hydrogen release, generating a complex mixture of spent fuel products. We present evidence for the induction period involving isomerization of AB into the diammoniate of diborane (DADB). The induction period is substantially decreased with the addition of DADB. The induction period is also dependent on AB purity and temperature. Reducing the induction period and enhancing the rate of hydrogen release ultimately makes AB an attractive hydrogen storage material for fuel applications. This study profiles the mechanism of the thermolysis of AB, the effect of AB purity and the effect of chemical additives on the induction period and rates of dehydrogenation of AB.

Original languageEnglish
Title of host publicationACS National Meeting Book of Abstracts
Publication statusPublished - 2007
Event234th ACS National Meeting - Boston, MA, United States
Duration: Aug 19 2007Aug 23 2007

Other

Other234th ACS National Meeting
CountryUnited States
CityBoston, MA
Period8/19/078/23/07

Fingerprint

Boranes
Thermolysis
Ammonia
Hydrogen
Hydrogen storage
Spent fuels
Dehydrogenation
Isomerization
Complex Mixtures
Kinetics

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Heldebrant, D. J., Autrey, T., Linehan, J., Camaioni, D. M., Rassat, S. D., & Zheng, F. (2007). Effect of additives on the thermolysis of ammonia borane. In ACS National Meeting Book of Abstracts

Effect of additives on the thermolysis of ammonia borane. / Heldebrant, David J.; Autrey, Tom; Linehan, John; Camaioni, Donald M.; Rassat, Scot D.; Zheng, Feng.

ACS National Meeting Book of Abstracts. 2007.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Heldebrant, DJ, Autrey, T, Linehan, J, Camaioni, DM, Rassat, SD & Zheng, F 2007, Effect of additives on the thermolysis of ammonia borane. in ACS National Meeting Book of Abstracts. 234th ACS National Meeting, Boston, MA, United States, 8/19/07.
Heldebrant DJ, Autrey T, Linehan J, Camaioni DM, Rassat SD, Zheng F. Effect of additives on the thermolysis of ammonia borane. In ACS National Meeting Book of Abstracts. 2007
Heldebrant, David J. ; Autrey, Tom ; Linehan, John ; Camaioni, Donald M. ; Rassat, Scot D. ; Zheng, Feng. / Effect of additives on the thermolysis of ammonia borane. ACS National Meeting Book of Abstracts. 2007.
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AB - Ammonia borane (AB) is an attractive hydrogen storage material with high gravimetric and volumetric density of hydrogen. The thermolysis of solid ammonia borane follows sigmoidal kinetics with an "induction period" prior to rapid hydrogen release, generating a complex mixture of spent fuel products. We present evidence for the induction period involving isomerization of AB into the diammoniate of diborane (DADB). The induction period is substantially decreased with the addition of DADB. The induction period is also dependent on AB purity and temperature. Reducing the induction period and enhancing the rate of hydrogen release ultimately makes AB an attractive hydrogen storage material for fuel applications. This study profiles the mechanism of the thermolysis of AB, the effect of AB purity and the effect of chemical additives on the induction period and rates of dehydrogenation of AB.

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