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A kinetic study of the thermal degradation of cetyltrimethylammonium bromide inside the mesoporous SBA-3 molecular sieve

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Authors
Rajić, Nevenka
Stojaković, Đorđe
Mrak, Maja
Kaučič, Venčeslav
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Abstract
Thermal degradation of cetyltrimethylammonium bromide (CTMAB) inside the mesoporous SBA-3 has been studied under non-isothermal conditions. There are two distinct although partly overlapping kinetic processes, and both of them can be described by the Sestak-Berggren model. The main decomposition step proceeds with E(a) = 116 +/- 2 kJ/mol which is significantly lower than for the mesoporous MCM-41 and MCM-48 suggesting that the interaction between CTMAB and the silica network plays a crucial role in the removal of the surfactant from the as-synthesized material. The second decomposition step has a higher E(a) value (E(a) = 153 +/- 5 kJ/mol) than the first step, indicating that it is primarily controlled by the size of the pore openings.
Keywords:
non-isothermal kinetics / open-framework / TG analysis / SBA-3 / cetyltrimethylammonium bromide (CTMAB) / liquid-crystal templating
Source:
Zeolites and Related Materials: Trends, Targets and Challenges, Proceedings of the 4th International, 2008, 174, 977-980
Publisher:
  • Elsevier Science Bv, Amsterdam

ISSN: 0167-2991

WoS: 000283742800051

[ Google Scholar ]
URI
http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1352
Collections
  • Radovi istraživača / Researchers’ publications (TMF)
Institution/Community
Tehnološko-metalurški fakultet
TY  - CONF
AU  - Rajić, Nevenka
AU  - Stojaković, Đorđe
AU  - Mrak, Maja
AU  - Kaučič, Venčeslav
PY  - 2008
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1352
AB  - Thermal degradation of cetyltrimethylammonium bromide (CTMAB) inside the mesoporous SBA-3 has been studied under non-isothermal conditions. There are two distinct although partly overlapping kinetic processes, and both of them can be described by the Sestak-Berggren model. The main decomposition step proceeds with E(a) = 116 +/- 2 kJ/mol which is significantly lower than for the mesoporous MCM-41 and MCM-48 suggesting that the interaction between CTMAB and the silica network plays a crucial role in the removal of the surfactant from the as-synthesized material. The second decomposition step has a higher E(a) value (E(a) = 153 +/- 5 kJ/mol) than the first step, indicating that it is primarily controlled by the size of the pore openings.
PB  - Elsevier Science Bv, Amsterdam
C3  - Zeolites and Related Materials: Trends, Targets and Challenges, Proceedings of the 4th International
T1  - A kinetic study of the thermal degradation of cetyltrimethylammonium bromide inside the mesoporous SBA-3 molecular sieve
EP  - 980
SP  - 977
VL  - 174
UR  - conv_3485
ER  - 
@conference{
author = "Rajić, Nevenka and Stojaković, Đorđe and Mrak, Maja and Kaučič, Venčeslav",
year = "2008",
abstract = "Thermal degradation of cetyltrimethylammonium bromide (CTMAB) inside the mesoporous SBA-3 has been studied under non-isothermal conditions. There are two distinct although partly overlapping kinetic processes, and both of them can be described by the Sestak-Berggren model. The main decomposition step proceeds with E(a) = 116 +/- 2 kJ/mol which is significantly lower than for the mesoporous MCM-41 and MCM-48 suggesting that the interaction between CTMAB and the silica network plays a crucial role in the removal of the surfactant from the as-synthesized material. The second decomposition step has a higher E(a) value (E(a) = 153 +/- 5 kJ/mol) than the first step, indicating that it is primarily controlled by the size of the pore openings.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Zeolites and Related Materials: Trends, Targets and Challenges, Proceedings of the 4th International",
title = "A kinetic study of the thermal degradation of cetyltrimethylammonium bromide inside the mesoporous SBA-3 molecular sieve",
pages = "980-977",
volume = "174",
url = "conv_3485"
}
Rajić, N., Stojaković, Đ., Mrak, M.,& Kaučič, V.. (2008). A kinetic study of the thermal degradation of cetyltrimethylammonium bromide inside the mesoporous SBA-3 molecular sieve. in Zeolites and Related Materials: Trends, Targets and Challenges, Proceedings of the 4th International
Elsevier Science Bv, Amsterdam., 174, 977-980.
conv_3485
Rajić N, Stojaković Đ, Mrak M, Kaučič V. A kinetic study of the thermal degradation of cetyltrimethylammonium bromide inside the mesoporous SBA-3 molecular sieve. in Zeolites and Related Materials: Trends, Targets and Challenges, Proceedings of the 4th International. 2008;174:977-980.
conv_3485 .
Rajić, Nevenka, Stojaković, Đorđe, Mrak, Maja, Kaučič, Venčeslav, "A kinetic study of the thermal degradation of cetyltrimethylammonium bromide inside the mesoporous SBA-3 molecular sieve" in Zeolites and Related Materials: Trends, Targets and Challenges, Proceedings of the 4th International, 174 (2008):977-980,
conv_3485 .

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