尽管颗粒过滤有着广阔的应用前景，但有关其在室内环境中应用于空气中纳米颗粒的文献却很少。因此，使用2 mm、4 mm和6 mm的均匀玻璃珠作为床层介质，设计并评估了体径（D）为25.4 cm的填充床颗粒过滤器。在床层厚度分别为0.1D、0.333D和0.5D的情况下，以三种气流速度（23、54和70 L/min）进行试验。对于直径在10到100nm之间的颗粒，颗粒过滤效率为90%或更高。扩散是主要的过滤机制，正如预期的那样，过滤效率随着床层厚度和停留时间的增加而增加，但随着颗粒直径的增加而降低。 单位:SICitation:ASHRAE Transactions，第114卷，pt。2、盐湖城2008

Despite the promising applications of granular filtration, there is a shortage of literature for its application for airborne nanoparticles in indoor environments. Accordingly, a pack-bed granular filter with body diameter (D) of 25.4 cm was designed and evaluated using 2 mm, 4 mm, and 6 mm uniform glass beads as the bed media. Experiments were conducted at three airflow rates—23, 54, and 70 L/min—each at bed thicknesses of 0.1D, 0.333D, and 0.5D, respectively. The particle filtration efficiencies were 90% or higher for particles with diameters between 10 and 100 nm. Diffusion is the dominant filtration mechanism, and, as expected, the efficiency increases with bed thickness and residence time, but decreases with particle diameter.Units: SI