Method for applying mesocellular silica hollow sphere iron-based oxygen carrier
A technology of mesoporous silica and its application method, which is applied in the petroleum industry, fuel additives, fuels, etc., can solve the problems of low mechanical strength, easy sintering and agglomeration, and low loading of metal oxides, and achieve physical and mechanical properties Stabilize, improve reaction ability, avoid agglomeration and sintering effect
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Embodiment 1
[0027] (1) Preparation of mesoporous silica hollow spheres: Dissolve 10mL of 25% tetrapropylammonium hydroxide (TPAOH) aqueous solution and 0.92g of NaOH in 45mL of deionized water, and take another 0.33g of TPAOH Al 2 (SO 4 ) 3 18H 2 O was dissolved in water to form a 47mL solution, then 11.2mL of tetraethyl orthosilicate (TEOS) was added and stirred rapidly for 20min, the above two solutions were mixed and stirred for 4h and then left to stand at 5°C for 24h; measure 2.72g of Cetyltrimethylammonium bromide (CTAB) was dissolved in water to form a 100mL solution, and this solution was added to the previous mixed solution, stirred vigorously at room temperature for 8h, and then the white solution was transferred to the lined poly In a stainless steel reaction kettle made of tetrafluoroethylene, heat water in a constant temperature oven at 140°C for 24h; after cooling, filter and wash with deionized water several times, and dry the white solid in an ordinary blast drying oven...
Embodiment 2
[0031] (1) Preparation of mesoporous silica hollow spheres: According to the method of step (1) in Example 1, 3 g of mesoporous silica hollow spheres were prepared.
[0032] (2) Fe 2 o3 Filling of the inner core: measure 80g of Fe(NO 3 ) 3 9H 2 O was dissolved in ethanol to form a solution with a concentration of 1 mol / L, and 3 g of mesoporous silica hollow spheres obtained above were added to the above solution, and the suspension was evacuated for 30 min under ultrasonic conditions, then the vacuum pump was turned off and the The pressure in the container was adjusted to normal pressure, and the ultrasonic treatment was continued for 10 minutes; after the mixture was centrifuged, the solid was blown and dried at room temperature, and the dry powder was quickly washed twice with absolute ethanol, and then blown and dried again at room temperature, Finally, the dry powder was calcined at 500°C for 3h (programmed temperature increase rate was 4°C / min, holding time was 3h), a...
Embodiment 3
[0035] (1) Preparation of mesoporous silica hollow spheres: Dissolve 10mL of TPAOH (25% aqueous solution) and 0.80g of NaOH in 45mL of deionized water, and measure 0.30g of Al 2 (SO 4 ) 3 18H 2 O was dissolved in water to form a 47mL solution, then 11.2mL of TEOS was added and stirred rapidly for 20min, the above two solutions were mixed and stirred for 4h and then left to stand at 5°C for 24h; 2.50g of CTAB was dissolved in water to form 100mL Add the solution to the previous mixed solution, stir vigorously at room temperature for 8 hours, then transfer the white solution to a stainless steel reaction kettle lined with polytetrafluoroethylene, and heat it in a constant temperature oven at 140°C for 24 hours; After cooling, filter and wash with deionized water several times, dry the white solid in an ordinary blast drying oven at 110°C for 4h, and finally roast at 500°C for 6h (programmed temperature rise rate is 1.5°C / min, holding time is 6h), that is, 3 g of mesoporous si...
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