Layering ASZM-TEDA Carbon Beds of Varying Particle Sizes to Optimize Filter Performance

Abstract : This research investigated cyanogen chloride (CK) filtration performance and airflow resistance of adsorbent beds consisting of two ASZM-TEDA Carbon layers of different particle size. Adsorbent particle size affects filter performance in two ways: (1) smaller particle size results in increased chemical vapor breakthrough time and (2) larger particle size results in lower airflow resistance. CK was used as a basis for assessing filtration performance because it is a design-limiting agent for NBC filters. The results of the study showed that ASZM-TEDA Carbon beds consisting of an inlet layer of larger particle size followed by a layer of smaller particle size provided a superior trade-off of filtration performance and airflow resistance.