Preparation method of small-crystal-grain nanometer hierarchical pore SSZ-13 molecular sieve
A molecular sieve, multi-level pore technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of small mesopore specific surface area and mesopore volume, single pore size of SSZ-13 molecular sieve, etc. , to achieve the effect of improving the large grain size
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0029] Weigh 0.9g of sodium hydroxide and add it to 45mL of distilled water, stir until it is completely dissolved, then add 5g of TMADaOH and 0.24g of TPOAC dropwise, stir evenly, then add 6.5g of ethyl orthosilicate dropwise, and finally add 0.5g of Y-type molecular sieve (Si / Al=25), stirred for 1h to form an initial gel.
[0030] Put the initial gel formed above into a hydrothermal reaction kettle, raise the temperature to 140°C for hydrothermal crystallization reaction for 96 hours, wash and dry the product, and bake it in an air atmosphere at 550°C for 6 hours to obtain small-grain nano-hierarchical porous SSZ- 13 Molecular sieves.
[0031] figure 1 The XRD pattern of the nanoscale hierarchical SSZ-13 molecular sieve prepared above is given. according to figure 1 It can be seen that the prepared SSZ-13 molecular sieve maintains the characteristic diffraction peaks (2θ=9.4°, 20.5°, 30.4°) of the CHA type molecular sieve.
[0032] Furthermore, according to figure 2...
Embodiment 2
[0036] Weigh 0.9g of sodium hydroxide and add it to 40mL of distilled water, stir until it is completely dissolved, then add 4g of TMADaOH and 0.48g of TPOAC dropwise, stir evenly, then add 6.5g of ethyl orthosilicate dropwise, and finally add 0.5g of Y-type molecular sieve (Si / Al=12), stirred for 1.5h to form an initial gel.
[0037] Put the initial gel formed above into a hydrothermal reaction kettle, raise the temperature to 140°C for hydrothermal crystallization reaction for 96 hours, wash and dry the product, and bake it in an air atmosphere at 550°C for 6 hours to obtain small-grain nano-hierarchical porous SSZ- 13 Molecular sieves.
Embodiment 3
[0039] Weigh 0.8g of sodium hydroxide and add it to 40mL of distilled water, stir until completely dissolved, then dropwise add 4g of TMADaOH and 0.48g of TPOAC, stir evenly, then dropwise add 7g of tetraethyl orthosilicate, and finally add 0.1g of Y-type molecular sieve (Si / Al=6), stirred for 0.5h to form an initial gel.
[0040] Put the initial gel formed above into a hydrothermal reaction kettle, raise the temperature to 160°C for hydrothermal crystallization reaction for 120 hours, wash and dry the product, and roast it under an air atmosphere at 550°C for 6 hours to obtain a small-grain nano-hierarchical porous SSZ- 13 Molecular sieves.
PUM
| Property | Measurement | Unit |
|---|---|---|
| Total specific surface area | aaaaa | aaaaa |
| Mesopore specific surface area | aaaaa | aaaaa |
| Mesopore volume | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More