Overall apparent reaction rates for the removal of monochloramine (MCA) in granular activated carbon (GAC) beds were determined using a fixed-bed reactor system and under conditions typical for swimming pool water treatment. Reaction rates dropped and quasi-stationary conditions were reached quickly. Diffusional mass transport in the pores was shown to be limiting the overall reaction rate. This was reflected consistently in the Thiele modulus, in the effect of temperature, pore size distribution and of grain size on the reaction rates. Pores <2.5 times the diameter of the monochloramine molecule were shown to be barely accessible for the monochloramine conversion reaction. GACs with a significant proportion of large mesopores were found to have the highest overall reactivity for monochloramine removal.

使用固定床反应器系统并在游泳池水处理的典型条件下，确定了去除颗粒活性炭（GAC）床中一氯胺（MCA）的总体表观反应速率。反应速度下降，很快达到了准稳态条件。孔中的扩散物质传输显示出限制了整体反应速率。这始终反映在Thiele模量，温度，孔径分布和晶粒尺寸对反应速率的影响上。孔隙小于一氯胺分子直径的2.5倍，对于一氯胺转化反应来说几乎是不可接近的。发现具有大比例的大中孔的GAC具有最高的整体反应活性，可去除一氯胺。