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How to Choose the Right Activated Carbon Based on Key Parameters
Release time:
2025-06-12 17:30
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When we purchase activated carbon, there are many indicators to consider. Choosing the right product based on these indicators is a complex task. This article provides a brief introduction to the basic indicators of activated carbon.
The commonly used parameters of activated carbon are mainly divided into three categories: adsorption performance, physical properties, and chemical properties. Among them, adsorption performance is an important basis for evaluating the adsorption capacity of activated carbon.
Below is a brief introduction to each indicator and its meaning:
1. Adsorption Performance Indicators
(These indicators are crucial for evaluating the adsorption capacity and efficiency of activated carbon.)
Iodine Value: The amount of iodine adsorbed by activated carbon. The higher the value, the more developed the micropores are, which is related to the adsorption of small molecules.
Carbon Tetrachloride Adsorption (CTC Value): Reflects the ability of activated carbon to adsorb carbon tetrachloride and indicates gas-phase adsorption capacity.
Methylene Blue Value: The amount of methylene blue adsorbed by activated carbon, indicating the ability to adsorb large molecules. Suitable for wastewater treatment.
Tannic Acid Value: The amount of tannic acid adsorbed by activated carbon, indicating its adsorption ability. This indicator is commonly used in water purification.
Molasses Value: The amount of molasses adsorbed by activated carbon, indicating its adsorption capability.
Caramel Decolorization Rate: Measures the decolorization ability of activated carbon for caramel, used in the food and beverage industry.
Specific Surface Area: Refers to the total surface area per gram of carbon, measured by nitrogen adsorption. A higher BET value means stronger adsorption potential.
Total Pore Volume: The total pore volume of activated carbon, directly related to its adsorption capacity.
2. Physical Property Indicators
(These properties affect the product’s performance and durability in actual use.)
Ash Content: The amount of inorganic residue in activated carbon, which affects adsorption performance. Lower ash content indicates higher purity and better adsorption performance.
Moisture Content: The amount of moisture in activated carbon. Excess moisture can affect adsorption performance.
Particle Size Distribution: Influences flow resistance, adsorption rate, and filtration performance.
Density (Bulk Density): The density of activated carbon in different forms, affecting the filling volume of adsorption devices.
Strength (Hardness/Abrasion Resistance): The mechanical strength of activated carbon, which affects its service life.
3. Chemical Property Indicators
(These parameters apply to special applications and safety standards.)
Volatile Matter Content: Indicates the portion of carbon that volatilizes under heating conditions, affecting performance stability.
Iron Salt Content: The amount of iron salts in activated carbon. This is critical in sensitive applications such as pharmaceuticals or electronics, where the metal ion content must be strictly controlled.
Different application fields have different requirements for the performance indicators of activated carbon. Whether you are engaged in gold recovery, air purification, water treatment, or food processing, understanding these parameters will help you choose the most suitable product.
When selecting activated carbon, you need to choose based on your actual situation.
Not sure which specification suits your needs? Contact us—our technical experts will provide the most suitable activated carbon solution according to your specific conditions and application requirements.
activated carbon indicators
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