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 | ACS National Meeting Book of Abstracts |
| Publication status | Published - 2007 |
| Event | 234th ACS National Meeting - Boston, MA, United States Duration: Aug 19 2007 → Aug 23 2007 |
Other
| Other | 234th ACS National Meeting |
|---|---|
| Country | United States |
| City | Boston, MA |
| Period | 8/19/07 → 8/23/07 |
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ASJC Scopus subject areas
- Chemistry(all)
Cite this
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 proceeding › Conference contribution
}
TY - GEN
T1 - Effect of additives on the thermolysis of ammonia borane
AU - Heldebrant, David J.
AU - Autrey, Tom
AU - Linehan, John
AU - Camaioni, Donald M.
AU - Rassat, Scot D.
AU - Zheng, Feng
PY - 2007
Y1 - 2007
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
SN - 0841269556
SN - 9780841269552
BT - ACS National Meeting Book of Abstracts
ER -