Dehydrogenation catalyst, method for applying same and application of dehydrogenation catalyst
A dehydrogenation catalyst and catalyst technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem that dehydrogenation catalysts are difficult to meet high activity, high selectivity and high stability at the same time, and achieve Excellent propane conversion rate, uniform dispersion effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0050] The present invention also provides the preparation method of above-mentioned dehydrogenation catalyst, and this method comprises:
[0051] 1) A step of preparing a nanoporous all-silicon molecular sieve with an MFI structure by a hydrothermal crystallization method;
[0052] 2) A step of introducing active components and auxiliary agents into the nanoporous all-silicon molecular sieve obtained in step 1).
[0053] In the method provided by the invention, preferably, the implementation process in step 1) includes:
[0054] (1) the step of carrying out the hydrothermal crystallization treatment of the mixture of the organosilicon source and the templating agent;
[0055] (2) The step of separating the solid in the mixture obtained by the hydrothermal crystallization treatment, and roasting and activating the separated solid.
[0056] In the above step (1), it is preferable to add the template agent into the organosilicon source, stir evenly, and then carry out constant...
preparation example 1
[0085] Add 36.8g of ethyl silicate and 36.3g of tetrapropylammonium hydroxide (tetrapropylammonium hydroxide is 25% templating agent aqueous solution) into the reaction flask, and stir for 2 hours. The solution was transferred to a stainless steel reaction kettle lined with tetrafluoroethylene, and reacted at a constant temperature of 160°C for 48h. After the solid was filtered and washed 4 times with deionized water, the mixture obtained by crystallization was filtered, the obtained solid was washed with deionized water, dried at 120 ° C for 12 hours, and further placed in a muffle furnace. , at a heating rate of 2°C / min, the temperature was raised to 550°C and calcined for 8 hours to obtain nanoporous all-silicon molecular sieves. XRD analysis was performed on the molecular sieve, and it was confirmed that the molecular sieve was a silicate1 molecular sieve with an MFI structure. Nanoporous all-silicon molecular sieves were characterized (such as figure 1 and figure 2 sh...
preparation example 2
[0087] Add 36.3 g of 43.7 g of ethyl silicate and tetrapropyl ammonium hydroxide (tetrapropyl ammonium hydroxide is an aqueous templating agent solution with a concentration of 25%) into the reaction flask, and stir for 2 h. The solution was transferred to a stainless steel reaction kettle lined with tetrafluoroethylene, and reacted at a constant temperature of 180°C for 48h. The obtained solid was filtered and washed 4 times with deionized water, dried at 120°C for 12 hours, further placed in a muffle furnace, and heated to 550°C for 8 hours at a heating rate of 2°C / min in an air atmosphere to obtain Nanoporous all-silicon molecular sieve. The molecular sieve was subjected to XRD analysis, and it was confirmed that the molecular sieve was a silicate 1 molecular sieve with an MFI structure. Nanoporous all-silicon molecular sieves were characterized by scanning electron microscopy and ASAP2020 automatic physicochemical adsorption analyzer, and the results are shown in Table 1....
PUM
| Property | Measurement | Unit |
|---|---|---|
| particle diameter | aaaaa | aaaaa |
| specific surface area | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More