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Promotional Effect of CO2 on Desulfation Processes for Pre-Sulfated Pt-BaO/Al2O3 Lean NOx Trap Catalysts

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Abstract

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.

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Acknowledgement

Use of the NSLS at Brookhaven National Laboratory (BNL) was supported by the U.S. Department of Energy (DOE), Office of Science/Basic Energy Sciences, under Contract No. DE-AC02-98CH10886. Financial support was provided by the U.S. DOE, Office of Energy Efficiency and Renewable Energy/Vehicle Technologies Program. Many of the experiments were performed in the Environmental Molecular Sciences Laboratory (EMSL) at Pacific Northwest National Laboratory (PNNL). The EMSL is a national scientific user facility supported by the U.S. DOE, Office of Science/Biological and Environmental Research. PNNL is a multi-program national laboratory operated for the U.S. DOE by Battelle Memorial Institute under Contract DE-AC06-76RLO 1830.

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Authors and Affiliations

  1. Institute for Interfacial Catalysis, Pacific Northwest National Laboratory, Richland, WA, 99352, USA

    Do Heui Kim, Ja Hun Kwak, Janos Szanyi, Mark H. Engelhard & Charles H. F. Peden

  2. Department of Chemical, Biological and Pharmaceutical Engineering, New Jersey Institute of Technology, Newark, NJ, USA

    Xianqin Wang

Authors
  1. Do Heui Kim
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  2. Ja Hun Kwak
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  3. Janos Szanyi
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  4. Xianqin Wang
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  5. Mark H. Engelhard
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  6. Charles H. F. Peden
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Correspondence to Do Heui Kim.

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Kim, D.H., Kwak, J.H., Szanyi, J. et al. Promotional Effect of CO2 on Desulfation Processes for Pre-Sulfated Pt-BaO/Al2O3 Lean NOx Trap Catalysts. Top Catal 52, 1719–1722 (2009). https://doi.org/10.1007/s11244-009-9328-8

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  • DOI: https://doi.org/10.1007/s11244-009-9328-8

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