Preparation method of gallium-containing zeolite and application to coal pyrolysis volatile matter transformation
A technology of zeolite and gallium source is applied in the field of preparation of gallium-containing zeolite to achieve the effects of promoting conversion, simple synthesis method and mild conditions
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Embodiment 1
[0062] (1) Under stirring conditions, first take 10.58g TPAOH and 0.233mL 10mol / L NaOH solution and add them to 10.81g water, then add 1.97g TPOAC to form a transparent solution A;
[0063] (2) Add 12.5g LUDOX HS-40 dropwise to solution A, stir for 1h after the dripping, add 0.21g gallium nitrate hydrate and 0.35g aluminum isopropoxide, and stir for 0.5h for aging;
[0064] (3) Transfer the solution obtained from step (2) room temperature aging to a stainless steel reactor with PTFE lining, crystallize at 140°C for 4 days, filter and wash with suction, dry at 105°C, and then roast at 550°C 6h;
[0065] (4) The solid obtained in step (3) is ion-exchanged with ammonium nitrate, exchanged three times, washed, dried, and calcined at 550° C. for 6 hours to obtain a multi-porous micron-scale framework-containing gallium molecular sieve with MFI framework structure.
[0066] See Figure 5 The molecular sieve prepared by this method obviously has intracrystalline mesopores formed by the remov...
Embodiment 2
[0068] (1) Under stirring conditions, first take 10.58g TPAOH and 0.233mL 10mol / L NaOH solution and add them to 10.81g water, then add 1.97g TPOAC to form a transparent solution A;
[0069] (2) Add 12.5g LUDOX HS-40 dropwise to A, stir for 1h, add 0.21g gallium nitrate hydrate and 0.087g aluminum isopropoxide, stir for 0.5h;
[0070] (3) Transfer the solution obtained from step (2) room temperature aging to a stainless steel reactor with PTFE lining, crystallize at 140°C for 4 days, filter and wash with suction, dry at 105°C, and then roast at 550°C 6h;
[0071] (4) The solid obtained in step (3) is ion-exchanged with ammonium nitrate, exchanged three times, washed, dried, and calcined at 550° C. for 6 hours to obtain a multi-porous micron-scale framework-containing gallium aluminum molecular sieve with MFI framework structure.
[0072] See Image 6 The molecular sieve prepared by this method can also observe the mesopores formed by the accumulation of particles on the surface and the...
Embodiment 3
[0074] (1) Under stirring conditions, first take 10.58g TPAOH and 0.233mL 10mol / L NaOH solution and add them to 10.81g water, then add 1.97g TPOAC to form a transparent solution A;
[0075] (2) Add 12.5g LUDOX HS-40 dropwise to A, stir for 1h, add 0.21g gallium nitrate hydrate and 0,17g aluminum isopropoxide, and stir for 0.5h;
[0076] (3) Transfer the solution obtained from step (2) room temperature aging to a stainless steel reactor with PTFE lining, crystallize at 140°C for 4 days, filter and wash with suction, dry at 105°C, and then roast at 550°C 6h;
[0077] (4) The solid obtained in step (3) is ion-exchanged with ammonium nitrate, exchanged three times, washed, dried, and calcined at 550° C. for 6 hours to obtain a multi-porous micron-scale framework-containing gallium aluminum molecular sieve with MFI framework structure.
[0078] See Figure 7 Obvious intracrystalline and intercrystalline mesopores can also be observed when synthesizing molecular sieves by this method. The ...
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