Research Article
Synthesis of Zeolite Nanomolecular Sieves of Different Si/Al Ratios
Table 1
Detailed reaction conditions and sample code for each as-synthesized zeolite nanomolecular sieve.
| | Code | Molar composition of reaction mixture |
Si/Al
ratio |
Silica source | Synthesis conditions | | Step I | Step II | Step III | | Temp. °C | Time, h | Temp. °C | Time, h | Temp. °C | Time, h |
| | MFI∞ | 25SiO2 : 10TPAOH : 485H2O | ∞ | TEOS | 25 | 24.0 | 75 | 1.0 | 150 | 1.5 | | MFI250 | 25SiO2 : 0.05Al2O3 : 10TPAOH : 485H2O | 250 | TEOS | 25 | 24.0 | 75 | 1.0 | 150 | 1.5 | | MFI100 | 25SiO2 : 0.13Al2O3 : 10TPAOH : 485H2O | 100 | TEOS | 25 | 24.0 | 75 | 1.0 | 150 | 1.5 | | FAU4.4 | 25SiO2 : 2.87Al2O3 : 13.75(TMA)2O : 0.025Na2O : 1625H2O | 4.4 | CSS | 25 | 24.0 | 75 | 1.0 | 150 | 8.0 | | LTA1 | 25SiO2 : 12.5Al2O3 : 13.75(TMA)2O : 2Na2O : 1625H2O | 1 | TMAS | 25 | 24.0 | 75 | 1.0 | 150 | 1.5 | | AFI0 | Al2O3 : 1.10P2O5 : 3.5TEAOH : 250H2O : 1.5HF | 0 | — | 25 | 24.0 | 75 | 1.0 | 175 | 12.0 |
|
|
Subscript in the sample code represents the Si/Al ratio of reaction mixture.
|
