Selecting and modification method of coal-based activated carbon suitable for use in high-gravity device

A selecting and modification method of a coal-based activated carbon suitable for use in a high-gravity device, wherein the selecting and modification method comprises the following steps:

• S1, washing six different coal-based activated carbons with deionized water, oven-drying, and cooling;
• conducting a reaction under a high-gravity factor by using each of cooled coal-based activated carbons as a first packing in a high-gravity rotating packed bed and water as a first impregnation solution;
• and determining attrition rates of each of the cooled coal-based activated carbons, and selecting the coal-based activated carbon that guarantees high stability of an obtained activated carbon catalyst;
• S2, washing the six different coal-based activated carbons with deionized water, oven-drying, and cooling;
• immersing each of resulting cooled coal-based activated carbons in a second impregnation solution having 0.1 mol/L of a cobalt salt, and conducting loading modification by a first high-temperature calcination to load the cobalt salt on a surface of each of the resulting cooled coal-based activated carbons to produce different activated carbon catalysts, respectively;
• and investigating catalytic activities of the different activated carbon catalysts in an aeration device, and selecting an activated carbon catalyst with a maximum catalytic activity;
• and
• S3, placing a resulting selected coal-based activated carbon as a second packing in the high-gravity rotating packed bed;
• preparing a precursor solution with a total concentration of 0.1 mol/L and a cobalt-to-manganese ratio of 3:1 as a third impregnation solution, and placing the third impregnation solution in a liquid storage tank;
• delivering the third impregnation solution from the liquid storage tank into an inner chamber of the high-gravity rotating packed bed by a circulation pump, spraying the third impregnation solution uniformly on an inner edge of an activated carbon support bed layer by a liquid distributor, such that the third impregnation solution is in full contact with the resulting selected coal-based activated carbon for impregnation radially in a spray form under a high-speed centrifugal force, returning third the impregnation solution to the liquid storage tank through a lower outlet of the activated carbon support bed layer, and conducting cyclic impregnation;
• and reacting for a period of time, oven-drying, and conducting a second high-temperature calcination to enable loading of an active component.