Adsorption characteristics
Activated carbon is a fine carbon particle with a large surface area and finer pores - capillaries. This capillary has a strong adsorption capacity, due to the large surface area of carbon particles, it can fully contact with the gas (impurities). When these gases (impurities) hit the capillary is adsorbed, play a role in purification. Activated carbon surface area study is very important, the activated carbon surface area measurement data only by BET method to detect the results are true and reliable, there are many domestic instruments can only do direct comparison test. At this stage, the multi-point BET method is adopted to test the specific surface area at home and abroad. The BET specific surface area standards developed at home and abroad are all based on the BET method. See GB / T 19587-2004 - Method for determining the specific surface area of solid matter. The BET surface area test is actually a time-consuming task. Due to the different adsorption capacities of samples, some samples may take a full day to test. If the test process is not fully automated, the tester can not leave at any moment High concentration, observation dashboard, control knob, a little careless will lead to the failure of the testing process, which would waste a lot of valuable time testers. F-Sorb 2400 surface area tester is truly BET method to detect the function of the instrument (both direct contrast method), more important F-Sorb 2400 surface area tester is by far the only fully automated intelligent surface area testing equipment , The test results with the international high consistency and stability is also good, while reducing human error and improve the accuracy of test results. The company is located in:
Mechanical properties
⑴ Particle Size: A standard sieve screening method was used to determine the weight of activated carbon remaining in and passing through each sieve, indicating the particle size distribution.
⑵ observation density or bulk density: diet pore volume and volume of interstitial particles volume of activated carbon per unit weight.
⑶ bulk density and particle density: diet pore volume rather than diet volume of granular volume per unit volume of activated carbon.
⑷ intensity: that of activated carbon crushing resistance.
⑸ wear resistance: that is wear-resistant or anti-friction properties.
These mechanical properties directly affect the application of activated carbon, for example: the density affects the size of the container; the charcoal thickness affects the filtration; the carbon particle size distribution affects the fluid resistance and the pressure drop; the fragmentation affects the life of the activated carbon and the regeneration of the waste charcoal.
Chemical characteristics
Activated carbon adsorption in addition to physical adsorption, as well as chemical adsorption. Activated carbon adsorption depends on both the pore structure, but also depends on the chemical composition.
Activated carbon not only contains carbon, but also contains small amounts of chemical bonds, oxygen and hydrogen initiated by functional groups, such as carbonyls, carboxyls, phenols, lactones, quinones and ethers. Some of these oxides and complexes on the surface, some from the raw material derivatives, some activated, activated by the air or water vapor generated role. Surface sulfides and chlorides are sometimes formed. In the activation of raw materials contained in the minerals concentrated in the activated carbon into ash, the main component of ash is alkali and alkaline earth metal salts, such as carbonates and phosphates.
