Impregnated activated carbon is a functional material that enhances specific adsorption performance through chemical modification. Its production process mainly consists of four key steps: raw material processing, impregnation modification, drying and activation, and performance testing.
During the raw material processing stage, it is necessary to screen out coal-based or wood-based activated carbon with high adsorption performance, with an iodine value of ≥800mg/g and a specific surface area of > 1000m²/g. After the ash is removed by acid washing, it is washed with water until neutral and dried to a moisture content of less than 3%. In the impregnation modification stage, different solutions are prepared according to the target application: For alkaline impregnation, 20%-40% potassium hydroxide solution is used; Acidic impregnation uses a 40%-60% phosphoric acid solution; For special purposes such as desulfurization, potassium iodide is added.
Mix activated carbon with the impregnating liquid in a ratio of 1:1 to 1:3, and stir at 60-80℃ for 1-3 hours to complete the impregnation. Subsequently, pre-drying at 100-120℃ and cremation in an inert atmosphere at 130-180℃ for 1-2 hours are carried out. To enhance performance, the mesoporous structure can be activated and amplified by steam at 800-900℃.
The finished products need to be tested for indicators such as iodine value and methylene blue adsorption value. For desulfurization products, the H₂S penetration capacity (> 30%wt) also needs to be tested. This material has a VOCs removal rate of over 95% in the treatment of chemical waste gas and an adsorption rate of 99.2% for chromium ions in electroplating wastewater. It is an important functional material in the field of environmental governance.
https://www.naturecarbon.com/coconut-shell-activated-carbon/impregnated-activated-carbon.html
