Available Technologies

Background

In general, exhaust gas purifying catalysts are made of oxides such as Al₂O₃ and precious metals such as Pd, Pt, Rh. However, such catalysts lose their gas purifying capability very rapidly at temperature as high as 1000℃, although they are expensive as their precious metal content are high.

Description and Advantages

Kyoto University researchers developed novel catalysts that overcome above
challenges.

High Thermostability at 1100℃ Max

Low precious metal contents

High gas purification capability maintained with half the precious metal (Pd) content than currently-available catalysts (Fig. 2).

Fig. 1: NO_x/hydrocarbon conversion efficiency of novel catalysts

Fig. 2: NO_x/hydrocarbon conversion efficiency of novel catalysts and currently-available catalyst (Pd/Al₂O₃)