As a carbonaceous adsorption material, activated carbon is widely used in meteorological and liquid phase adsorption and purification. activated carbon gold recovery Therefore, accurate detection of its physical, adsorption and chemical properties is very important for guiding the production and application of activated carbon.
In order to control the quality of activated carbon products, according to the types and uses of activated carbon, many types of activated carbon performance testing methods have been established, which can generally be divided into activated carbon performance testing, microstructure testing and application simulation evaluation testing.
Generally, the performance testing of activated carbon is the most widely used, mainly including physical performance testing, physical performance testing, adsorption performance testing and chemical performance testing. The main testing indicators are iodine value, methylene blue, carbon tetrachloride, specific surface area, pore size distribution, benzene Adsorption, strength, packing density, ash and volatile content, etc.
Methylene blue is also an indicator of the adsorption performance of activated carbon. Because of its large molecular diameter, it is generally believed that it is mainly adsorbed in pores with larger pore diameters. The value of methylene blue mainly characterizes the number of pores in the activated carbon.
The test principle is to take a certain amount of activated carbon sample and mix it with a known concentration of methylene blue solution to fully mix and absorb, use a spectrophotometer to detect the concentration change of the test methylene blue solution, and calculate the number of milligrams of methylene blue adsorbed per gram of activated carbon sample.
Iodine value is also the most commonly used index to determine the adsorption performance of activated carbon.activated carbon manufacturers australia It is generally believed that its value has a good relationship with the number of micropores in the activated carbon. The detection principle is to weigh a certain amount of activated carbon and prepare a well-prepared iodine value with a known concentration after fully shaking and mixing, then titrate the amount of residual iodine in the solution to calculate the number of milligrams of iodine adsorbed per gram of activated carbon.