The two transport worlds, passive and active, have long been thought to be mutually exclusive. “We have shown that it is not always so black and white,” Paulino asserted.

Alexander Sappok, Ifran Govani, Carl Kamp, Yujun Wang, Victor Wong, In-Situ Optical Analysis of Ash Formation and Transport in Diesel Particulate Filters During Active and Passive DPF Regeneration ...