Particle density, general properties adsorbents

All of the various applications require special adsorbent characteristics. The broadest and generally the most significant are the inherent adsorption capacity and selectivity. In many cases, the adsorption and desorption rates or kinetics and pressure drop are also important hence, particle size is important. In addition, nearly every different application has a different set of additional priorities. For example, the main prerequisite for municipal water purification and many other large-scale applications is low cost. Other adverse conditions can complicate adsorbent specifications. For example, properties such as density, color, fluid compatibility, and durability (e.g., attrition resistance, crush strength, and hardness) all may be important. Adsorbents that have the ideal combination of essential characteristics for a specific application may or may not exist. That implies that compromises are frequently necessary. 

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