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Granular Series Activated Carbon: An Overview
Release time:
2025-05-29
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Abstract
Granular series activated carbon (GAC) is a highly porous, adsorbent material derived from carbonaceous raw materials such as coal, coconut shells, wood, or fruit shells. Its unique structure, characterized by a vast internal surface area and a complex network of micro-, meso-, and macropores, enables it to effectively remove contaminants from gases and liquids through physical and chemical adsorption.
Key Characteristics
High Surface Area:
A typical gram of GAC can offer a surface area exceeding 1,000 m², providing ample sites for contaminant adsorption.
Pore Structure:
GAC contains three types of pores:
Micropores (<2 nm): Dominate adsorption for small molecules (e.g., volatile organic compounds, VOCs).
Mesopores (2–50 nm): Facilitate access to micropores and adsorb larger molecules.
Macropores (>50 nm): Act as transport channels for adsorbates.
Mechanical Strength:
GAC is engineered to withstand physical stress, ensuring longevity in applications like fixed-bed adsorption columns.
Chemical Stability:
Resistant to acids, bases, and organic solvents, making it suitable for harsh industrial environments.
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