Catalysts Application
Introduction
Michael Cheng
Eddie lin
Aug. 26, 2008
Part 1
TWC Fundamentals Introduction
TWC Components
载体Substrate
涂层Washcoat
巴斯夫汽车漆
氧化铝Alumina
储氧材料Oxygen storage Component 助剂Promoters and stabilizers
贵金属Precious Metal
Pt, Pd and Rh
载体Substrates
陶瓷Ceramic
z堇青石Cordierite
–2MgO-2Al
2O
3
-5SiO
2
–热稳定性Thermal Stability > 1300o C  金属Metallic
z铁铬合金Fe-cr alloy
–Fe, Cr, Al
–Y and/or Ce added
–热稳定性Thermal Stability < 1300o C