Patent ID: 8356475

Claim:
A diesel soot filter comprising: an inlet, an outlet, and a fluid path therebetween, wherein an exhaust gas having soot therein moves from the inlet to the outlet through the fluid path; a substrate having a surface disposed at least partially within the fluid path and a glass catalyst disposed on the surface of the substrate such that the exhaust gas contacts at least a portion of a surface of the glass catalyst as the exhaust gas moves from the inlet to the outlet; a plurality of alkali metal ions disposed within the glass catalyst and releasable to the surface of the glass catalyst at a controlled rate sufficiently fast to supplement the lost alkali metal ions at the surface of the glass catalyst and sufficiently slow to extend the catalytic lifespan of the filter, wherein the alkali metal ions combust with the soot as the exhaust gas travels along the fluid path, and wherein the composition by weight percentage of an oxide basis of the glass catalyst is about 35-85% SiO 2 , 15-65% K 2 O, and 0-15% CaO.