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

被引：3

作者：

Stojakovic, Djordje ^{[1
]}

Rajic, Nevenka ^{[1
]}

Mrak, Maja ^{[2
]}

Kaucic, Venceslav ^{[3
]}

机构：

[1] Univ Belgrade, Fac Technol & Met, Belgrade 11000, Serbia

[2] Jozef Stefan Inst, Ljubljana 1000, Slovenia

[3] Natl Inst Chem, Ljubljana 1000, Slovenia

来源：

JOURNAL OF THE SERBIAN CHEMICAL SOCIETY | 2007年 / 72卷 / 12期

关键词：

NPK method; non-isothermal kinetics; open-framework; SBA-3; cetyltrimethylammonium bromide (CTMAB);

D O I：

10.2298/JSC0712309S

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The thermal degradation of cetyltrimethylammonium bromide (CTMAB) inside the mesoporous SBA-3 was studied under non-isothermal conditions. There are two distinct and complex kinetic processes which partly overlap, each consisting of one dominant and three minor individual processes. The two dominant processes can be described by the Sestak-Berggren model. The main decomposition step (the first dominant process) involves the overcoming of weak interactions between CTMAB and the silica network and proceeds with a lower Ea value (116 +/- 2 kJ mol(-1)) than the second dominant process (153 +/- 5 kJ mol(-1)), which can be explained by the size reduction of the pore openings due to the contraction of the SBA-3 unit cell caused by the removal of CTMAB.

引用

页码：1309 / 1319

页数：11