Poison-resistant catalyst and systems containing same
View Patent ↗A poison-resistant catalytic converter includes a washcoat having a support material comprised of titania and/or silica and a plurality of platinum group metal particles disposed in the support material. The washcoat is disposed on a substrate having a plurality of cells that define respective apertures. The catalytic converter is resistant to poisoning from sulfur and phosphorous compounds while operating at low temperatures. Applications include spark ignited internal combustion engines in combined heat and power systems, vehicles, combustion turbines, boilers and other applications for utilities, industry and vehicle emissions control.
1. A catalytic converter comprising:
a substrate body having a plurality of cells that define respective apertures; and
a washcoat disposed on the substrate, the washcoat including:
a support material comprised of support particles of at least one of titania or silica; and
a plurality of catalyst particles disposed in the support material, the catalyst particles comprised of a platinum group metal, the platinum group metal including at least one of Pt, Pd, and Rh, wherein the catalyst particles are uniformly distributed in the support material.
2. The catalytic converter of claim 1 , wherein the support material further comprises a transition metal oxide.
3. The catalytic converter of claim 1 , wherein the support material further comprises a rare earth metal oxide.
4. The catalytic converter of claim 1 , wherein the support material comprises titania and the catalyst particles are comprised of at least one of Pt and Pd.
5. The catalytic converter of claim 4 , wherein the support material comprises 50% to 98% titania by weight.
6. The catalytic converter of claim 5 , wherein the support material comprises 10% to 50% of an oxide of at least one of Si, Al, Ce, Zr, Fe, Cu, Zn, Mo, W, and Mn.