Abstract
Capillary hydrodynamic fractionation (CHDF) was used, for the first time, to gain information about the particle growth mechanism of TS-1 zeolite. The particle size and the particle size distribution (PSD) of the mother solution were directly and easily monitored by CHDF during crystallization. The effects of the reaction temperature, and the ratios of H2O/Si and TPAOH/Si on the particle growth were studied. During crystallization of zeolite particles, bimodal PSD and an abrupt increase in the number average particle size (30 to 60-80 nm) were observed. It is suggested that zeolite particles of 60-80 nm formed by the aggregation of several particles of 30 nm (i.e. particle intergrowth mechanism). The apparent activation energy for particle intergrowth was 30 kJ/mol. The maximum intergrowth time decreased with increasing reaction temperature, whereas it increased with increasing H2O/Si ratio. The proposed particle growth mechanism was also compared with SEM and TEM results.
| Original language | English |
|---|---|
| Pages (from-to) | 246-254 |
| Number of pages | 9 |
| Journal | Journal of Non-Crystalline Solids |
| Volume | 316 |
| Issue number | 2-3 |
| DOIs | |
| Publication status | Published - 2003 Feb 1 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Materials Chemistry
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Capillary hydrodynamic fractionation studies on the crystal growth of TS-1 zeolite. / Jung, K. T.; Shul, Y. G.
In: Journal of Non-Crystalline Solids, Vol. 316, No. 2-3, 01.02.2003, p. 246-254.Research output: Contribution to journal › Article
TY - JOUR
T1 - Capillary hydrodynamic fractionation studies on the crystal growth of TS-1 zeolite
AU - Jung, K. T.
AU - Shul, Y. G.
PY - 2003/2/1
Y1 - 2003/2/1
N2 - Capillary hydrodynamic fractionation (CHDF) was used, for the first time, to gain information about the particle growth mechanism of TS-1 zeolite. The particle size and the particle size distribution (PSD) of the mother solution were directly and easily monitored by CHDF during crystallization. The effects of the reaction temperature, and the ratios of H2O/Si and TPAOH/Si on the particle growth were studied. During crystallization of zeolite particles, bimodal PSD and an abrupt increase in the number average particle size (30 to 60-80 nm) were observed. It is suggested that zeolite particles of 60-80 nm formed by the aggregation of several particles of 30 nm (i.e. particle intergrowth mechanism). The apparent activation energy for particle intergrowth was 30 kJ/mol. The maximum intergrowth time decreased with increasing reaction temperature, whereas it increased with increasing H2O/Si ratio. The proposed particle growth mechanism was also compared with SEM and TEM results.
AB - Capillary hydrodynamic fractionation (CHDF) was used, for the first time, to gain information about the particle growth mechanism of TS-1 zeolite. The particle size and the particle size distribution (PSD) of the mother solution were directly and easily monitored by CHDF during crystallization. The effects of the reaction temperature, and the ratios of H2O/Si and TPAOH/Si on the particle growth were studied. During crystallization of zeolite particles, bimodal PSD and an abrupt increase in the number average particle size (30 to 60-80 nm) were observed. It is suggested that zeolite particles of 60-80 nm formed by the aggregation of several particles of 30 nm (i.e. particle intergrowth mechanism). The apparent activation energy for particle intergrowth was 30 kJ/mol. The maximum intergrowth time decreased with increasing reaction temperature, whereas it increased with increasing H2O/Si ratio. The proposed particle growth mechanism was also compared with SEM and TEM results.
UR - http://www.scopus.com/inward/record.url?scp=0037303442&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0037303442&partnerID=8YFLogxK
U2 - 10.1016/S0022-3093(02)01599-5
DO - 10.1016/S0022-3093(02)01599-5
M3 - Article
AN - SCOPUS:0037303442
VL - 316
SP - 246
EP - 254
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
SN - 0022-3093
IS - 2-3
ER -