A kinetic study of the thermal degradation of cetyltrimethylammonium bromide inside the mesoporous SBA-3 molecular sieve
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 templatingSource:
Zeolites and Related Materials: Trends, Targets and Challenges, Proceedings of the 4th International, 2008, 174, 977-980Publisher:
- Elsevier Science Bv, Amsterdam
Institution/Community
Tehnološko-metalurški fakultetTY - JOUR 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 T2 - 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 - https://hdl.handle.net/21.15107/rcub_technorep_1352 ER -
@article{ 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 = "https://hdl.handle.net/21.15107/rcub_technorep_1352" }
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. https://hdl.handle.net/21.15107/rcub_technorep_1352
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. https://hdl.handle.net/21.15107/rcub_technorep_1352 .
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, https://hdl.handle.net/21.15107/rcub_technorep_1352 .