Abstract
The crystal size and shape of the silicoaluminophosphate molecular sieve SAPO-34 have been effectively controlled in the reaction system of Al 2O3-P2O5-SiO2-TEAOH- H2O under microwave radiations. Nano sheet-like SAPO-34 crystals are obtained when using colloidal silica as the silica source. When TEOS is used as the source of silica, homogeneous SAPO-34 crystals with a particle size of about 100 nm are formed, and the morphology of the crystals changes from uniform nano particles (∼100 nm) to microspheres (∼ 1.5 μm) by varying the H 2O/Al2O3 molar ratio. To further investigate the morphology control of SAPO-34, the synthetic factors, such as the silica source, water content, crystallization time and aging time have been studied in detail.
Original language | English |
---|---|
Pages (from-to) | 1304-1310 |
Number of pages | 7 |
Journal | Topics in Catalysis |
Volume | 53 |
Issue number | 19-20 |
DOIs | |
Publication status | Published - Dec 2010 |
Externally published | Yes |
Keywords
- Microwave heating
- Morphology
- SAPO-34
- Zeolite