A kind of preparation method of noble metal @zsm core-shell structure catalyst
A core-shell structure and catalyst technology, which is applied in the field of preparation of noble metal@ZSM core-shell structure catalysts, can solve the problems of inability to achieve fine desulfurization, limited adsorption performance, and lack of noble metal active sites, so as to improve desulfurization efficiency and service life. Implementation, high success rate effect
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[0027] A preparation method of a noble metal@ZSM core-shell structure catalyst, comprising the following steps:
[0028] Step 1: Add the first base compound to the first part of water and stir, after dissolving, add CO-520 and cyclohexane with a volume ratio of 1: (2~3) and continue to stir evenly to form microemulsion A;
[0029] Step 2: Add an appropriate amount of hydrochloric acid and the second part of water to the noble metal salt and stir. After dissolving, add CO-520 and cyclohexane with a volume ratio of 1: (2~3) and continue stirring to form a microemulsion B;
[0030] Step 3: Mix microemulsion A with microemulsion B, add an appropriate amount of the second alkali compound after stirring for a period of time, continue stirring for a period of time, slowly add an organic amine template and stir evenly to obtain microemulsion C;
[0031] Step 4: Add a certain amount of aluminum source compound to microemulsion C under stirring, after the aluminum source is evenly dispe...
Embodiment 1
[0046] Add 2.9 g of NaOH to 650 ml of water and stir. After dissolving, add 850 ml of CO-520 and 2550 ml of cyclohexane and continue to stir evenly to form a microemulsion A; Add 0.5ml of hydrochloric acid and 450ml of water to copper nitrate and stir. After dissolving, add 850ml of CO-520 and 2550ml of cyclohexane and continue to stir evenly to form microemulsion B; mix microemulsion A with microemulsion B, and then add 19 ml concentrated ammonia water, continue to stir for a period of time, slowly add 25.0g TPAOH and stir evenly to obtain microemulsion C; add 6.3 g aluminum isopropoxide to microemulsion C under stirring, after the aluminum isopropoxide is uniformly dispersed, slowly Add 320 g TEOS, continue to stir until it becomes white emulsion, then transfer it to a hydrothermal synthesis kettle, and crystallize at 150°C for 72 hours; the crystallized material is separated from solid and liquid, washed, and put into an oven for 5 The temperature was raised to 100°C for 2 ...
Embodiment 2
[0048] Add 2.7 g of NaOH to 400 ml of water and stir. After dissolving, add 800 ml of CO-520 and 1600 ml of cyclohexane and continue stirring to form a microemulsion A; add 1.0 g of ruthenium chloride, 5.4 g of cerium nitrate hexahydrate and 2.1 g of silver nitrate Add 300ml of water and stir. After dissolving, add 1200ml of CO-520 and 2400ml of cyclohexane and continue to stir evenly to form microemulsion B; mix microemulsion A with microemulsion B, add 12 ml of concentrated ammonia after stirring for a while, continue After stirring for a period of time, slowly add 15.7g of TPAOH and stir evenly to obtain microemulsion C; add 7.9 g of aluminum isopropoxide to microemulsion C under the action of stirring, after the aluminum isopropoxide is uniformly dispersed, slowly add 320 g of TEOS, continue Stir until it becomes a white emulsion, then transfer it to a hydrothermal synthesis kettle, and crystallize at 150°C for 72 hours; the crystallized material is separated from solid and...
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