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Institute for Integrated Catalysis

IIC experts discuss science of reducing diesel engine emissions in catalysis journal

(September 2008)

Photo: Diesel Engines
Experts at EMSL are working to reduce harmful emissions of nitrogen oxides from diesel engines.

Diesel engines could improve the fuel economy of vehicles by 25 to 35% compared to gasoline engines; however, the current catalytic converters do not effectively reduce engine emissions of nitrogen oxides or NOx. Nitrogen oxide emissions can cause health and environmental problems.

In the July 2008 issue of Catalysis Today, seven experts from Pacific Northwest National Laboratory's Institute of Interfacial Catalysis wrote invited papers on their research to improve catalysts for diesel engines:

  • IIC interim director Chuck Peden, one of the three guest editors for the edition, co-wrote the preface for the issue.
  • Christelle Verrier, Ja Hun Kwak, Do Heui Kim, Chuck Peden, and János Szanyi examined the NOx storage properties of several alkaline earth oxides supported on the common catalyst support material γ-Al2O3.
  • Darrel Herling and János Szanyi along with Emrah Ozensoy of the Bilknet University in Ankara, Turkey, wrote on their studies of dimethyl ether as a reducing agent for the selective catalytic reduction of NOx with hydrocarbons.
  • Do Heui Kim, Ja Hun Kwak, Xianqin Wang, János Szanyi, and Chuck Peden described research on promoting the stability of lean-NOx trap catalysts by limiting platinum sintering during sulfur removal processes.

The work by Kim et al. and Verrier et al. was funded by the DOE, Office of Freedom Car and Vehicle Technologies. The work of Ozensoy et al. was funded by DOE's Office of Basic Energy Sciences, Division of Chemical Sciences and the Scientific and Technical Research Council of Turkey.

References: Epling WS, I Nova, and CHF Peden. 2008. "Preface." Catalysis Today 136(1-2):1-2.

Kim DH, JH Kwak, X Wang, J Szanyi, and CHF Peden. 2008. "Sequential high temperature reduction, low temperature hydrolysis for the regeneration of sulfated NOx trap catalysts." Catalysis Today 136(1-2):183-187.

Ozensoy E, DR Herling, and J Szanyi. 2008. "NOx reduction on a transition metal-free γ-Al2O3 catalyst using dimethylether (DME)." Catalysis Today 136(1-2):46-54.

Verrier CLM, JH Kwak, DH Kim, CHF Peden, and J Szanyi. 2008. "NOx uptake on alkaline earth oxides (BaO, MgO, CaO and SrO) supported on γ-Al2O3." Catalysis Today 136(1-2):121-127.

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