A kinetic study of the thermal degradation of cetyl-trimethylammonium bromide inside the mesoporous SBA-3 molecular sieve(Article)(Open Access)
- aFaculty of Technology and Metallurgy, University of Belgrade, 11000 Belgrade, Serbia
- bJozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
- cNational Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
Abstract
Thermal degradation of cetyltrimethylarnmonium 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 Ea = 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 Ea value (Ea = 153±5 kJ/mol) than the first step, indicating that it is primarily controlled by the size of the pore openings. © 2008 Elsevier B.V. All rights reserved.
- ISSN: 01672991
- ISBN: 978-044453298-5
- CODEN: SSCTD
- Source Type: Book Series
- Original language: English
- DOI: 10.1016/S0167-2991(08)80053-5
- Document Type: Article
Rajic, N.; Faculty of Technology and Metallurgy, University of Belgrade, Serbia
© Copyright 2009 Elsevier B.V., All rights reserved.