The Study on the Capacity of NOx Storage-Reduction Catalyst for Lean-Burn Engine

摘要

Components in NOx storage reduction (NSR) catalysts have been studied in order to identify their impact on NSR performance. In order to enhance the catalytic performance of the NSR catalyst, the hydrothermal stability and sulfur tolerance of the NSR catalyst were improved by developing new NSR formula. The results show that Pt/BaO/Ce_(0.7)Zr_(0.3)O_2 + Rh/Al_2O_3 catalyst has superior NSR activity, thermal stability and sulfur tolerance. The influence of space velocity, oxygen concentration and Lean-Rich period on the NSR activity was investigated.