Details
| Original language | English |
|---|---|
| Title of host publication | Developments in Strategic Ceramic Materials II |
| Subtitle of host publication | A Collection of Papers Presented at the 40th International Conference on Advanced Ceramics and Composites, ICACC 2016 |
| Editors | Waltraud M. Kriven, Yanchun Zhou, Jingyang Wang, Dongming Zhu, Gustavo Costa |
| Publisher | American Ceramic Society |
| Pages | 93-108 |
| Number of pages | 16 |
| Edition | 7 |
| ISBN (electronic) | 9781119321811 |
| ISBN (print) | 9781119321781 |
| Publication status | Published - 30 Jan 2017 |
| Event | Developments in Strategic Ceramic Materials II - 40th International Conference on Advanced Ceramics and Composites, ICACC 2016 - Daytona Beach, United States Duration: 24 Jan 2016 → 29 Jan 2016 |
Publication series
| Name | Ceramic Engineering and Science Proceedings |
|---|---|
| Number | 7 |
| Volume | 37 |
| ISSN (Print) | 0196-6219 |
Abstract
Some new applications in geopolymer research concerning hosting hydrogen storage materials have been reported recently. According to this, sodium boronhydride (SB = NaBH4) and ammoniaborane (AB = NH3BH3) could be re-crystallized within a geopolymer (G). In this study an investigation of the thermally induced hydrogen release reactions and destruction products of these new materials in comparison to the behavior of SB and AB were carried out at temperatures up to 400°C. New results are obtained in TG/DTA and temperature dependent infrared absorption (TIR) experiments, where the different materials were diluted in KBr and pressed in pellets. The melting of AB is observed at the same temperature of 115-118°C for AB and AB-G in DTA and TIR experiments. Hydrogen release could be followed using the reduction reaction of NaNO3 added in the pressed pellet starting from about 110°C for AB and AB-G and with a maximum at 120°C in accordance with the first exothermic maximum in DTA. The formation of BH4ˉ anions indicating the formation of DADB ([(NH3)2BH2]BH4]) and NH2 of PAB (poly-aminoborane) are observed at about 110 and 120°C for AB-G and AB, respectively. SB-G shows a temperature shift from about 250 to 300°C in the reaction with oxygen depending on being dried by evacuating previous to the temperature treatment or not. A similar effect is observed for SB, as well, but with a shift of only 10°C. The TIR method conducted on SB using NaNO3 indicates an initial hydrogen release between 200 and 300°C and a more pronounced effect between 300 and 400°C. An increase in NaBO2 could be detected above 300°C. Indications of a possible transient state could be seen at about 1575 cm-1 in the IR absorption spectra between 200 and 300°C.
ASJC Scopus subject areas
- Materials Science(all)
- Ceramics and Composites
- Materials Science(all)
- Materials Chemistry
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Developments in Strategic Ceramic Materials II : A Collection of Papers Presented at the 40th International Conference on Advanced Ceramics and Composites, ICACC 2016. ed. / Waltraud M. Kriven; Yanchun Zhou; Jingyang Wang; Dongming Zhu; Gustavo Costa. 7. ed. American Ceramic Society, 2017. p. 93-108 (Ceramic Engineering and Science Proceedings; Vol. 37, No. 7).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Investigations of the Thermally Induced Hydrogen Release of NaBh4, Nh3Bh3 and Their Geopolymer Composites
AU - Assi, Z.
AU - Schomborg, L.
AU - Rüscher, C. H.
N1 - Funding information:: This work was supported by DAAD and DFG.
PY - 2017/1/30
Y1 - 2017/1/30
N2 - Some new applications in geopolymer research concerning hosting hydrogen storage materials have been reported recently. According to this, sodium boronhydride (SB = NaBH4) and ammoniaborane (AB = NH3BH3) could be re-crystallized within a geopolymer (G). In this study an investigation of the thermally induced hydrogen release reactions and destruction products of these new materials in comparison to the behavior of SB and AB were carried out at temperatures up to 400°C. New results are obtained in TG/DTA and temperature dependent infrared absorption (TIR) experiments, where the different materials were diluted in KBr and pressed in pellets. The melting of AB is observed at the same temperature of 115-118°C for AB and AB-G in DTA and TIR experiments. Hydrogen release could be followed using the reduction reaction of NaNO3 added in the pressed pellet starting from about 110°C for AB and AB-G and with a maximum at 120°C in accordance with the first exothermic maximum in DTA. The formation of BH4ˉ anions indicating the formation of DADB ([(NH3)2BH2]BH4]) and NH2 of PAB (poly-aminoborane) are observed at about 110 and 120°C for AB-G and AB, respectively. SB-G shows a temperature shift from about 250 to 300°C in the reaction with oxygen depending on being dried by evacuating previous to the temperature treatment or not. A similar effect is observed for SB, as well, but with a shift of only 10°C. The TIR method conducted on SB using NaNO3 indicates an initial hydrogen release between 200 and 300°C and a more pronounced effect between 300 and 400°C. An increase in NaBO2 could be detected above 300°C. Indications of a possible transient state could be seen at about 1575 cm-1 in the IR absorption spectra between 200 and 300°C.
AB - Some new applications in geopolymer research concerning hosting hydrogen storage materials have been reported recently. According to this, sodium boronhydride (SB = NaBH4) and ammoniaborane (AB = NH3BH3) could be re-crystallized within a geopolymer (G). In this study an investigation of the thermally induced hydrogen release reactions and destruction products of these new materials in comparison to the behavior of SB and AB were carried out at temperatures up to 400°C. New results are obtained in TG/DTA and temperature dependent infrared absorption (TIR) experiments, where the different materials were diluted in KBr and pressed in pellets. The melting of AB is observed at the same temperature of 115-118°C for AB and AB-G in DTA and TIR experiments. Hydrogen release could be followed using the reduction reaction of NaNO3 added in the pressed pellet starting from about 110°C for AB and AB-G and with a maximum at 120°C in accordance with the first exothermic maximum in DTA. The formation of BH4ˉ anions indicating the formation of DADB ([(NH3)2BH2]BH4]) and NH2 of PAB (poly-aminoborane) are observed at about 110 and 120°C for AB-G and AB, respectively. SB-G shows a temperature shift from about 250 to 300°C in the reaction with oxygen depending on being dried by evacuating previous to the temperature treatment or not. A similar effect is observed for SB, as well, but with a shift of only 10°C. The TIR method conducted on SB using NaNO3 indicates an initial hydrogen release between 200 and 300°C and a more pronounced effect between 300 and 400°C. An increase in NaBO2 could be detected above 300°C. Indications of a possible transient state could be seen at about 1575 cm-1 in the IR absorption spectra between 200 and 300°C.
UR - http://www.scopus.com/inward/record.url?scp=85029895136&partnerID=8YFLogxK
U2 - 10.1002/9781119321811.ch10
DO - 10.1002/9781119321811.ch10
M3 - Conference contribution
AN - SCOPUS:85029895136
SN - 9781119321781
T3 - Ceramic Engineering and Science Proceedings
SP - 93
EP - 108
BT - Developments in Strategic Ceramic Materials II
A2 - Kriven, Waltraud M.
A2 - Zhou, Yanchun
A2 - Wang, Jingyang
A2 - Zhu, Dongming
A2 - Costa, Gustavo
PB - American Ceramic Society
T2 - Developments in Strategic Ceramic Materials II - 40th International Conference on Advanced Ceramics and Composites, ICACC 2016
Y2 - 24 January 2016 through 29 January 2016
ER -