The iodine adsorption value is also an indicator of activated carbon. The iodine value is used to measure the price of activated carbon. The same material and specification of activated carbon can use iodine value to measure the quality and price of activated carbon.
The strong adsorption capacity of activated carbon mainly depends on the iodine value, butane to, ash, and bulk weight. The following is an indication of the effect of various values ​​of activated carbon on the adsorption force of activated carbon:
Iodine value
The iodine value refers to the amount of iodine adsorbed by activated carbon in a 0.02 N 12/KL aqueous solution. The iodine value is associated with the pore surface area greater than 10 A in diameter.
The high iodine value of activated carbon is one of the criteria for judging.
2. Butane value
The butane value is the adsorption of butane by the activated carbon per unit weight of saturated air and butane at a specific temperature and under a specific pressure through the carbon bed.
3. Ash
There are two kinds of gray powder of activated carbon: surface gray powder, and the other is internal gray powder. Generally speaking, the gray powder of activated carbon refers to the internal gray powder.
4. Moisture
Moisture is a measure of how much water is contained in the carbon, that is, the weight of the adsorbed water in the activated carbon.
5. Hardness
The hardness value refers to the resistance of the granular activated carbon to the decaying motion of the steel ball in the RO-TAP instrument. Hardness is an indicator of the mechanical strength of activated carbon.
Carbon tetrachloride
The carbon tetrachloride value is an indicator of the total pore volume measured by a saturated zero Celsius CCI4 gas stream passing through a 25 degree carbon bed.
6. Sugar value
The molasses value is a measure of the relative decolorization ability of activated carbon in a boiling molasses solution. The molasses value is interpreted as a surface with a hole diameter greater than 28A
product. Because molasses is a multi-component mixture, this parameter must be tested in strict accordance with the instructions. The molasses value is the activated carbon standard and the activity to be tested.
The sample of charcoal is treated with a molasses solution obtained by calculating the ratio of the optical density of the filtrate.
7. Stacking weight
Stacking weight is a method of measuring the mass of a specific amount of carbon. By gradually adding activated carbon to a graduated drum to 100 cc and measuring its mass. This value is used to calculate the amount of activated carbon required to fill a particular adsorption unit. Simply put, the bulk weight is the weight per unit volume of activated carbon.
8. Particle density
The particle density is the weight of the granular carbon per unit volume, excluding the particles and the space between the cracks greater than 0.1 mm.
9. Methylene blue
The methylene blue value refers to the number of milligrams of methylene blue absorbed when 1.0 g of carbon and 1.0 m/L of methylene blue solution reach equilibrium.
10. Wear value
The wear value is an indicator for measuring the wear resistance of activated carbon. The wear value of the granular activated carbon indicates that the particles reduce the resistance of the particles during the treatment.
The ratio of the average diameter of the final particles to the average diameter of the original particles was determined.
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