The AC is typically injected at the lowest temperature available that is upstream of a particle-collecting device because experience has found that mercury collection is most efficient at lower temperatures.
Mercury collection is most efficient at lower temperatures.
A city sidewalk scene consisting of two men with dreadlocks sitting on the ground, a punk rocker holding books, a woman with a camera walking away, and a man wearing a long coat, scarf, hat, and sunglasses looking away from the picture.