Elemental composition of activated carbon
2020年11月24日In addition to carbon, the element composition of activated carbon also contains oxygen, hydrogen and other elements. Most of the oxygen and hydrogen elements in activated carbon form a chemical combination with carbon to form surface oxides. Other elements mainly constitute the ash content of activated carbon. The content of various elements in activated carbon is related to the raw materials used and the process conditions for producing activated carbon.
Carbon element
Carbon is the main element in activated carbon. The content of carbon in wood activated carbon is usually more than 90%, and it increases with the increase of the activation degree. The presence of carbon has a decisive influence on the properties and structure of activated carbon. The microcrystalline structure formed by it brings porosity to activated carbon; the type and quantity of surface compounds formed by it and hydrogen and oxygen have great effects on the surface properties of activated carbon such as hydrophobicity and hydrophilicity. Impact.https://www.coalactivatedcarbon.com/
Oxygen and hydrogen
The elite elements of oxygen and hydrogen are the main elements other than carbon in activated carbon. These two elements are present in different degrees in all activated carbons.
The oxygen and hydrogen contained in the raw materials are not completely removed during the carbonization activation process and remain, and they are the main sources of these two elements. In addition, air and water vapor will inevitably exist during the carbonization activation process, which is also one of the possible sources of oxygen and hydrogen. As the activation temperature of carbon increases, the content of oxygen and hydrogen in activated carbon decreases. However, even if the temperature rises above 1,000 degrees Celsius, they cannot be removed from the activated carbon.
The two elements of oxygen and hydrogen usually form surface compounds on the surface of activated carbon, which will affect the adsorption performance of activated carbon to a certain extent.
Ash
Ash is the inorganic part of activated carbon, and its content and composition are greatly affected by the types of raw materials, and to a certain extent by the process conditions used in the manufacture of activated carbon.
The chemical composition of ash is relatively complex, usually composed of oxides, carbonates, and silicates of many elements.https://www.chinactivecarbon.com/
Carbon element
Carbon is the main element in activated carbon. The content of carbon in wood activated carbon is usually more than 90%, and it increases with the increase of the activation degree. The presence of carbon has a decisive influence on the properties and structure of activated carbon. The microcrystalline structure formed by it brings porosity to activated carbon; the type and quantity of surface compounds formed by it and hydrogen and oxygen have great effects on the surface properties of activated carbon such as hydrophobicity and hydrophilicity. Impact.https://www.coalactivatedcarbon.com/
Oxygen and hydrogen
The elite elements of oxygen and hydrogen are the main elements other than carbon in activated carbon. These two elements are present in different degrees in all activated carbons.
The oxygen and hydrogen contained in the raw materials are not completely removed during the carbonization activation process and remain, and they are the main sources of these two elements. In addition, air and water vapor will inevitably exist during the carbonization activation process, which is also one of the possible sources of oxygen and hydrogen. As the activation temperature of carbon increases, the content of oxygen and hydrogen in activated carbon decreases. However, even if the temperature rises above 1,000 degrees Celsius, they cannot be removed from the activated carbon.
The two elements of oxygen and hydrogen usually form surface compounds on the surface of activated carbon, which will affect the adsorption performance of activated carbon to a certain extent.
Ash
Ash is the inorganic part of activated carbon, and its content and composition are greatly affected by the types of raw materials, and to a certain extent by the process conditions used in the manufacture of activated carbon.
The chemical composition of ash is relatively complex, usually composed of oxides, carbonates, and silicates of many elements.https://www.chinactivecarbon.com/
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