Cobalt-based catalyst having core-shell structure, and preparation method thereof
A cobalt-based catalyst, core-shell structure technology, applied in chemical instruments and methods, preparation of liquid hydrocarbon mixtures, catalysts for physical/chemical processes, etc. and other problems, to achieve the effect of high oil-wax selectivity, easy industrial scale-up, and lower production costs
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[0023] Example 1
[0024] By mass percentage Co: MnO 2 :ZrO 2 / Al 2 O 3 Composite oxide support = 10:1:89 ratio to synthesize cobalt-based catalyst. Specific steps are as follows:
[0025] Step 1. According to the mass percentage of 10:1:89 above, first weigh out 5g of microspherical ZrO 2 / Al 2 O 3 Composite oxide carrier (prepared by spray drying molding technology, particle size is 500μm, specific surface area is 230m 2 / g, the pore volume is 1.1cm 3 / g, the average pore size distribution is 15nm).
[0026] Step 2. Weigh 2.77g cobalt nitrate and 0.16g manganese nitrate, and dissolve them in 5mL alcohol water (V Ethanol :V water =1:1) in the immersion liquid.
[0027] Step 3. Add 5g of micro spherical ZrO 2 / Al 2 O 3 The composite oxide carrier is put into the rotary evaporator, and under the condition of rapid stirring, every 1gZrO 2 / Al 2 O 3 Under the dropping rate of 1mL / s of the composite oxide carrier, the impregnating solution prepared in step 2 is quickly pumped in by a pe...
Example Embodiment
[0028] Example 2
[0029] By mass percentage Co:La 2 O 3 :SiO 2 / Al 2 O 3 The composite oxide support = 15:0.5:84.5 to synthesize the cobalt-based catalyst. Specific steps are as follows:
[0030] Step 1. According to the above 15:0.5:84.5 mass percentage, first weigh out 5g clover SiO 2 / Al 2 O 3 Composite oxide carrier (prepared by extrusion molding technology, particle size length is within 10mm, diameter is 5mm, specific surface area is 260m 2 / g, the pore volume is 1.0cm 3 / g, the average pore size distribution is 14nm).
[0031] Step 2. Weigh 4.38g cobalt nitrate and 0.08g lanthanum nitrate, and dissolve them in 5mL alcohol water (V Ethanol :V water =2:1), prepared as an immersion liquid.
[0032] Step 3. Put 5g clover type SiO 2 / Al 2 O 3 The composite oxide carrier is put into the rotary evaporator, and under the condition of rapid stirring, every 1gSiO 2 / Al 2 O 3 Under the dropping rate of 1.5 mL / s of the composite oxide carrier, the immersion liquid prepared in step 2 was...
Example Embodiment
[0033] Example 3
[0034] By mass percentage Co:NiO:TiO 2 / Al 2 O 3 The ratio of composite oxide support = 20:0.5:79.5 was used to synthesize a cobalt-based catalyst. Specific steps are as follows:
[0035] Step 1. First weigh out 5g of cylindrical TiO according to the above 20:0.5:79.5 mass percentage 2 / Al 2 O 3 Composite oxide carrier (prepared by extrusion molding technology, particle size length is within 8mm, diameter is 4mm, specific surface area is 250m 2 / g, the pore volume is 0.9cm 3 / g, the average pore size distribution is 12nm).
[0036] Step 2. Weigh 6.21g cobalt nitrate and 0.12g nickel nitrate, and dissolve them in 4.5mL alcohol water (V Ethanol :V water = 5:1) in the immersion liquid.
[0037] Step 3. Put 5g cylindrical TiO 2 / Al 2 O 3 The composite oxide carrier is put into the rotary evaporator, and under the condition of rapid stirring, every 1gTiO 2 / Al 2 O 3 Under the dropping rate of 2mL / s of the composite oxide carrier, the impregnating solution prepared in s...
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