Vapor-phase deposition preparation method of load type iron catalyst
An iron catalyst, vapor deposition technology, applied in catalyst activation/preparation, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of high safety cost, strong toxicity and explosive capacity, etc. Strong control effect
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[0026] The preparation method of the supported iron catalyst is as follows.
[0027] Step 1. Filling of the catalyst carrier; the specific method is as follows:
[0028] Catalyst carrier adopts Al 2 O 3 , SiO 2 , Aluminosilicate, zeolite molecular sieve, MgO or ZrO 2 The catalyst carrier is in the form of particles, and the particle size is in the range of 10-100 mesh; the catalyst carrier is filled in the reaction tube, and the catalyst carrier fills the cross section of the reaction tube to form the catalyst carrier bed 3; The catalyst carrier bed 3 is fixed by metal mesh, glass wool or quartz wool.
[0029] Step 2. Place the ferrocene pile; the specific method is as follows:
[0030] Place the ferrocene stack in the reaction tube near the inlet end; the mass ratio of ferrocene to the catalyst carrier is 1:30-20:1; the center distance between the ferrocene stack and the catalyst carrier bed 3 is 0-50cm;
[0031] Step 3. Deposition of iron components; the specific method is as follows...
Example Embodiment
[0039] Example one
[0040] Supported iron catalyst preparation equipment such as figure 1 As shown, the reaction tube material is quartz; the first thermocouple and the second thermocouple use K-type thermocouples; the shut-off valve and the gas pipeline are made of stainless steel; the gas source is high-purity N 2 And compressed air; the flow rate of the source gas is controlled and displayed by a flow meter.
[0041] The preparation method of the supported iron catalyst, the preparation steps are as follows:
[0042] Step (1), weigh out 1.0 g γ-Al 2 O 3 Carrier, the particle size is 20~50 mesh, press figure 1 Place it in a quartz reaction tube and fix it with a wire mesh.
[0043] Step (2), weigh 0.8 g ferrocene solid, press figure 1 The distance between the center of the ferrocene stack and the carrier layer is 10 cm.
[0044] Step (3), with N 2 Is the air source, open the shut-off valve to make N 2 Flow into the inlet end of the reaction tube, N 2 The flow rate is 25 mL / min; t...
Example Embodiment
[0048] Embodiment two The difference from the first embodiment is: step (1) uses γ-Al 2 O 3 The particle size of the carrier is 40-80 mesh. Step (3) The temperature measured by the two thermocouples are both 130°C; N 2 The flow rate is 40 mL / min. Step (5) The second thermocouple shows that the temperature reaches 400 o C; Time is 6h.
[0049] After the preparation, the iron content in the catalyst is 5.5 wt%, and the size of the nano-iron is 2-7nm by transmission electron microscope.
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