High performing NOx storage and reduction Pt-BaO/Al2O3 catalyst: effects of the pre-calcination temperature of the support and the impregnation sequence for loading Pt and BaO

摘要

The catalytic NOx storage and reduction (NSR) technology is one of the most promising approaches for controlling NOx emission from the fuel-efficient lean-burn engines. The most investigated NSR catalyst system is based on Pt-BaO/Al2O3 consisting primarily of Pt and BaO dispersed on a γ-Al2O3 support. Improving the catalyst resistance to thermal sintering and lowering the loading of the precious metals in the catalysts have been the sustained topics in the development of a practical NSR catalyst.