Effect of additives on the thermolysis of ammonia borane

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

Effect of additives on the thermolysis of ammonia borane

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

Pacific Northwest National Laboratory

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English
Title of host publication	234th ACS National Meeting, Abstracts of Scientific Papers
Publication status	Published - Dec 31 2007
Event	234th ACS National Meeting - Boston, MA, United States Duration: Aug 19 2007 → Aug 23 2007

Publication series

Name	ACS National Meeting Book of Abstracts
ISSN (Print)	0065-7727

Other

Other	234th ACS National Meeting
Country	United States
City	Boston, MA
Period	8/19/07 → 8/23/07

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)

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@inproceedings{390ee4de0ee4432484d8494e33e85fe3,

title = "Effect of additives on the thermolysis of ammonia borane",

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.",

author = "Heldebrant, {David J.} and Tom Autrey and Linehan, {John C.} and Camaioni, {Donald M.} and Rassat, {Scot D.} and Feng Zheng",

year = "2007",

month = dec,

day = "31",

language = "English",

isbn = "0841269556",

series = "ACS National Meeting Book of Abstracts",

booktitle = "234th ACS National Meeting, Abstracts of Scientific Papers",

note = "234th ACS National Meeting ; Conference date: 19-08-2007 Through 23-08-2007",

}

TY - GEN

T1 - Effect of additives on the thermolysis of ammonia borane

AU - Heldebrant, David J.

AU - Autrey, Tom

AU - Linehan, John C.

AU - Camaioni, Donald M.

AU - Rassat, Scot D.

AU - Zheng, Feng

PY - 2007/12/31

Y1 - 2007/12/31

N2 - 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.

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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M3 - Conference contribution

AN - SCOPUS:37349127507

SN - 0841269556

SN - 9780841269552

T3 - ACS National Meeting Book of Abstracts

BT - 234th ACS National Meeting, Abstracts of Scientific Papers

T2 - 234th ACS National Meeting

Y2 - 19 August 2007 through 23 August 2007

ER -