LEXINGTON, Ky. (May 21, 2020) — Transportation is the world's largest source of greenhouse gas emissions. Automakers are challenged to meet higher standards designed to reduce vehic,le pollution. This pollution contributes to climate change and can be detrimental to human health.
Adhering to the new standards requires removing pollutants, specifically poisonous and highly reactive nitrogen oxides (NOx) from exhaust gas when a vehicle is started and the gas is still cold. The device that does this removal — a catalytic converter — needs to be warm to efficiently remove NOx, however.
Mark Crocker, professor of chemistry in the University of Kentucky