1. Iodine value: iodine value is a performance difference of activated carbon. The iodine value of shell, Wooden Activated Carbon and Coal Activated Carbon is several hundred. The iodine value of activated carbon raw material is from 800, 850, 900, 950, 1000, 1100mg/g and so on. The iodine value is the liquid phase adsorption index. It can be seen that the specific surface area of the activated carbon and the micropores are developed. The gas phase adsorption index is critical: CTC adsorption value, benzene adsorption value. Good activated carbon CTC>100%, benzene adsorption >50%), the adsorption capacity is also different! The cost price is also different! The activated carbon coconut shell with the same iodine value has excellent adsorption effect on small fractions, and different materials are used to select activated carbon of different materials.
In order to improve the adsorption performance of activated carbon, only the pore structure can be made on activated carbon as much as possible. The more pores, the more loose the activated carbon and the lighter the relative density, so the good activated carbon will be lighter in weight and in the same weight package. In the case of good performance, activated carbon will be much larger than inferior activated carbon.
2, look at the bubble: a small amount of activated carbon into the water, due to the penetration of water, the water will gradually immerse into the pore structure of the activated carbon, forcing the air in the pores to discharge, resulting in a series of extremely small bubbles, pulling out a piece of water Small bubble lines, and at the same time will emit a sound of bubbles. The more intense this phenomenon occurs, the longer the duration, the better the adsorption of activated carbon.
3, see the decolorization ability: another performance of the adsorption capacity of activated carbon is the ability to decolorize, activated carbon has the magic ability to turn colored liquid into light or colorless, which is actually because the activated carbon adsorbs the pigment molecules in the colored liquid of. Because of this characteristic of activated carbon, it is widely used in the production process of brown sugar and white sugar in the sugar industry. Take two transparent cups, put pure water in one cup, then drop a drop of red ink, stir evenly and pour half of the colored water into the other cup for comparison. Put the activated carbon into the colored water, the amount should reach half or more of the water, so the effect will be more obvious. After standing for 10-20 minutes, compare with the comparative water sample. Under the same conditions, the stronger the decolorization effect, the adsorption performance of the activated carbon. The better.