Nowadays Water quality is evaluated by the human based on color, odor and taste. So if the water looks clear, smells not bad, and tastes good, then people assume the water it’s safe. In compliance with taste requirement, Carbon Filter(CTO & GAC) is a series of sediment filter perfectly produce water which main components is Activated carbon.
So do you really know what is Activated carbon?
Activated carbon is a product obtained after activation treatment of wood, coal and other materials. In addition to the carbonization process, activated carbon also undergoes activation, pickling and drying stages.
Here you may have a question, what does activation mean?
Activation is one of the most important steps in the production of activated carbon. And generally speaking it’s divided into four main process according to the temperature change from thermal decomposition procedure:
Procedure 1: Drying
Mainly evaporates the moisture contained in the raw materials by externally supplied heat. The temperature source is controlled at about 150℃. The temperature is not high, so the chemical composition of the wooden material has not changed.
Procedure 2: Pre-carbonization
The thermal decomposition reaction of wood materials is obvious, and the chemical composition of raw materials begins to change due to the temperature rises to about 275℃. Some unstable components like hemicellulose generate CO2, CO1 and a small amount of acetic acid.
Procedure 3: Carbonization
Carbonization is the key of activated carbon carbonization with temperature up to 400℃. Therefore it is also called the exothermic reaction stage. The raw material undergoes rapid thermal decomposition, generating a large number of decomposition products. Liquid results contain a large amount of acetic acid, methanol and wood tar. In gas result, CO2 gradually decreases while combustible gases such as methane and ethylene gradually increase.
Procedure 4: Calcination
During the calcination process, the temperature reached 500℃. At this time, there were few liquid products, and the volatile substances remaining in the charcoal were discharged to increase the fixed carbon content of the charcoal.