Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 96-111 |
| Number of pages | 16 |
| Journal | Catalysis Today |
| Volume | 168 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2011 |
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Hierarchical zeolites prepared by organosilane templating : a study of the synthesis mechanism and catalytic activity. / Koekkoek, A.J.J.; Tempelman, C.H.L.; Degirmenci, V.; Guo, M.; Feng, Z.; Li, Can; Hensen, E.J.M.
In: Catalysis Today, Vol. 168, No. 1, 2011, p. 96-111.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Hierarchical zeolites prepared by organosilane templating : a study of the synthesis mechanism and catalytic activity
AU - Koekkoek, A.J.J.
AU - Tempelman, C.H.L.
AU - Degirmenci, V.
AU - Guo, M.
AU - Feng, Z.
AU - Li, Can
AU - Hensen, E.J.M.
PY - 2011
Y1 - 2011
N2 - The crystallization of hierarchical ZSM-5 in the presence of the organosilane octadecyl-dimethyl-(3-trimethoxysilyl-propyl)-ammonium chloride as the mesoporogen was investigated as a function of time and temperature. The synthesis by this method proceeds in two steps. The rapid formation of a predominantly amorphous disordered mesoporous aluminosilicate precursor phase is followed by the formation of globular highly mesoporous zeolite particles involving dissolution of the precursor phase. It is difficult to completely convert the initial phase into the final hierarchical zeolite. This limits the amount of aluminium built into the MFI network and the resulting Brønsted acidity. In the presence of iron, more crystalline hierarchical zeolite is obtained. These Fe-containing zeolites are excellent catalysts for the selective oxidation of benzene to phenol. Their hierarchical pore structure leads to higher reaction rates due to increased mass transfer and increased catalyst longevity despite more substantial coke formation.
AB - The crystallization of hierarchical ZSM-5 in the presence of the organosilane octadecyl-dimethyl-(3-trimethoxysilyl-propyl)-ammonium chloride as the mesoporogen was investigated as a function of time and temperature. The synthesis by this method proceeds in two steps. The rapid formation of a predominantly amorphous disordered mesoporous aluminosilicate precursor phase is followed by the formation of globular highly mesoporous zeolite particles involving dissolution of the precursor phase. It is difficult to completely convert the initial phase into the final hierarchical zeolite. This limits the amount of aluminium built into the MFI network and the resulting Brønsted acidity. In the presence of iron, more crystalline hierarchical zeolite is obtained. These Fe-containing zeolites are excellent catalysts for the selective oxidation of benzene to phenol. Their hierarchical pore structure leads to higher reaction rates due to increased mass transfer and increased catalyst longevity despite more substantial coke formation.
U2 - 10.1016/j.cattod.2010.12.033
DO - 10.1016/j.cattod.2010.12.033
M3 - Article
VL - 168
SP - 96
EP - 111
JO - Catalysis Today
JF - Catalysis Today
SN - 0920-5861
IS - 1
ER -