Apparatus and method for preparing metal catalyst
A technology of metal catalysts and packed beds, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, catalyst activation/preparation, etc., which can solve the problems of long impregnation time, unevenness, and low impregnation content , to achieve the effect of improving the impregnation effect, increasing the contact probability, and enhancing the mass transfer process
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Embodiment 1
[0032] Example 1: Preparation of supported metal activated carbon catalysts by the high gravity method, with activated carbon as the carrier, a salt solution containing copper and cerium metal ions as the activation component, and a high gravity rotating packed bed as the impregnation and activation equipment to prepare a transition metal catalyst . The scale of the experiment is a small test, the loading amount of activated carbon is 100g each time, the flow rate of the impregnating liquid is 200L / h, and the speed of the high-gravity rotating packed bed is 900r / min during the whole experiment. During activation, the air heater heats the air to 140°C. The immersion time is 10min, and the activation time is 10min. The experimental results showed that the loading of copper was 11% and that of cerium was 5.3%. At the same time, a magnetic stirrer was used to prepare the catalyst for comparison. The catalyst was immersed in the same impregnation solution for 60 minutes and activ...
Embodiment 2
[0033] Example 2: A manganese-loaded activated carbon metal catalyst was prepared by the supergravity method. Under the same working conditions as in Example 1, the influence of the rotational speed on the impregnation and activation effects was investigated. Experiments show that the loading content of activated carbon catalysts loaded with metals increases with the increase of rotational speed. When the rotation speed is 1100r / min, the metal loading of the catalyst is 12.3%, and when the rotation speed is 300r / min, the catalyst loading is 9.6%.
Embodiment 3
[0034]Example 3: Using Al2O3 and carbon fiber as carriers, transition metals and noble metal salt solutions as active components, different types of metal catalysts were prepared by the high-gravity method, and compared with the conventional soaking method. Experiments show that the loading capacity of the metal catalyst prepared by the supergravity method is much larger than that of the catalyst impregnated by the conventional method, and the impregnation time and activation time can be greatly shortened by the supergravity method. With aluminum oxide as the carrier and nickel-containing metal salt as the active component, the high-gravity rotating packed bed is impregnated for 10 minutes, activated in a high-gravity environment at 140°C for 15 minutes, and the rotation speed is 900r / min. The metal loading capacity of the catalyst can reach 8.2 %; impregnated by conventional soaking method for 20 minutes, activated in an oven at 140°C for 20 minutes, and the metal loading cont...
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