Preparation method for carbide catalyst for organic carbon vapor phase growth and application thereof
A vapor phase growth, catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, heterogeneous catalyst chemical elements, physical/chemical process catalysts, etc., can solve uneven distribution, uncontrollable catalyst particle shape, etc. problem, to avoid uneven distribution, efficient preparation, simple and environmentally friendly process
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[0025] Embodiment 1, a method for preparing a catalyst for the vapor-phase growth of organic carbon into carbides, the method comprising: adding 30% sodium hydroxide and 5% dodecylbenzenesulfonate to 30% ferric nitrate containing catalytic elements Sodium is prepared by co-precipitation method and high-pressure hydrothermal method to prepare a mixture of iron-containing catalyst precursors. The percentages of the above substances are mass percentage concentrations. The mixture is added to a centrifugal spray dryer and spray-dried at 240°C. The cyclone separator and bag filter of the spray dryer collect the catalyst precursor. The catalyst precursor has a particle size of 60-150 microns, and then it is calcined in a rotary furnace at 450°C for 3 hours to obtain a particle size of 50-120 microns and a specific surface area of 90m. 2 / g of catalyst particles, the main composition of the catalyst is iron oxide (95%).
[0026] When the catalyst is applied, the above-mentioned catalys...
Example Embodiment
[0027] Embodiment 2, a method for preparing a catalyst for the vapor phase growth of organic carbon into carbides, the method comprising: adding 15% ammonium carbonate and 5% sodium phosphate to 10% cobalt chloride containing catalytic elements according to the co-precipitation method , The mixture of cobalt-containing catalyst precursor is prepared by high-pressure hydrothermal method. The percentages of the above substances are mass percentage concentrations. The mixture is added to the centrifugal spray dryer and spray dried at a temperature of 280℃. The catalyst precursor is collected by a filter and a bag filter. The catalyst precursor has a particle size of 80-200 microns, and then is calcined in a rotary kiln at 400°C for 2 hours to obtain a particle size of 60-150 microns and a specific surface area of 60m. 2 / g of catalyst particles, the main composition of the catalyst is cobalt oxide (90%).
[0028] When the catalyst is applied, the above-mentioned catalyst is placed ...
Example Embodiment
[0029] Embodiment 3, a method for preparing a catalyst for the vapor growth of organic carbon into carbides, the method comprising: adding 30% ammonium carbonate and 5% metaphosphoric acid to 20% nickel nitrate and 10% cobalt nitrate containing catalytic elements Sodium is prepared by co-precipitation method and high-pressure hydrothermal method to prepare a mixture of iron and cobalt catalyst precursors. The percentages of the above substances are mass percentage concentrations. The mixture is added to a two-fluid spray dryer and sprayed at 220 ℃ For drying, the cyclone separator and bag filter of the two-fluid spray dryer collect the catalyst precursor. The catalyst precursor has a particle size of 70-40 microns, and then it is calcined in a rotary kiln at 400°C for 2 hours to obtain a particle size of 50-110 microns , Specific surface area 100m 2 / g catalyst particles, the main composition of the catalyst is iron and cobalt oxide (98%).
[0030] When the catalyst is applied, t...
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