Method for preparing liquid fuel through mesoporous silica hollow sphere based catalyst
A mesoporous silica and liquid fuel technology, which is applied in the preparation of biofuels, waste fuels, and liquid hydrocarbon mixtures, can solve the problems of catalyst deactivation, achieve high-efficiency conversion, facilitate rapid conversion, and have good catalytic cracking effects Effect
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Embodiment 1
[0025] Preparation of mesoporous silica hollow spheres: Measure 10mL of TPAOH (25% aqueous solution) and 0.92g of NaOH dissolved in 45mL of deionized water, and measure 0.33g of Al 2 (SO 4 ) 3 18H 2 O was dissolved in water to make 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; 2.72g of CTAB was dissolved in water to make 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 at 100°C for 6 hours, and finally calcinate at 500°C for 8 hours to obtain 3g of mesoporous silica hollow spheres.
[0026] Filled with TiO 2 Preparation of mesoporous silica h...
Embodiment 2
[0031] The filling TiO of 11.7g prepared in embodiment 1 2 The mesoporous silica hollow ball catalyst was ground to a particle size of about 0.5 mm, and all of them were loaded into a fluidized bed catalytic reactor for online catalytic cracking experiments.
[0032] Using natural air-dried poplar wood (moisture content 8%) with a particle size of about 2mm as raw material, rapid pyrolysis is carried out in a nitrogen atmosphere at 500°C. After gas-solid separation, the high-temperature pyrolysis gas is directly passed into the catalyst chamber. In the fluidized bed catalytic reactor, control the volume space velocity of the pyrolysis gas in the catalytic reactor to 15000h -1 , and finally condense the pyrolysis gas to obtain liquid products.
[0033] The collected liquid product was analyzed, and its moisture content was 32%, its higher heating value was 18.0 MJ / kg, its pH value was 4.4, and its kinematic viscosity at 40° C. was 4 cSt.
Embodiment 3
[0035] Filled with ZrO 2 Preparation of mesoporous silica hollow spheres: Measure 60g of ZrOCl 2 ·8H 2 O was dissolved in ethanol to form a solution with a concentration of 0.5 mol / L, and 3 g of mesoporous silica hollow spheres prepared in Example 1 were added to the above solution, and the suspension was vacuumed for 30 min under ultrasonic conditions, and then Turn off the vacuum pump and adjust the pressure in the container to normal pressure, and continue the ultrasonic treatment for 10 minutes; after the mixture is centrifuged, the solid is blown and dried at room temperature, and the dry powder is quickly washed twice with absolute ethanol, and then placed again at room temperature Purge and dry, and finally bake the dry powder at 500°C for 2h to obtain 15.3g of filled ZrO 2 mesoporous silica hollow spheres, in which ZrO 2 and SiO 2 The mass ratio is 4.1:1.
[0036] Fill the above with ZrO 2 The mesoporous silica hollow sphere catalyst was ground to a particle size...
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