A combination of H2 TPRX, TR-XRD and XPS analysis has been used to investigate the effects of CO2 on the desulfation of pre-sulfated Pt BaO/Al2O3 samples. The results demonstrate that the presence of CO2 promotes the removal of sulfur species, especially at temperatures below 500 °C, with a corresponding suppression of BaS formation, thus resulting in a lower amount of residual sulfur on the sample after desulfation.
Revised: July 16, 2010 |
Published: December 1, 2009
Citation
Kim D., J. Kwak, J. Szanyi, X. Wang, M.H. Engelhard, and C.H. Peden. 2009.Promotional effect of CO2 on desulfation processes for pre-sulfated Pt BaO/Al2O3 lean NOx trap catalysts.Topics in Catalysis 52, no. 13-20:1719-1722.PNNL-SA-64161.doi:10.1007/s11244-009-9328-8