Reactivity of Pt/BaO/Al₂O₃ for NOx Storage/Reduction: Effects of Pt and Ba Loading
The control of NOx (NO and NO₂) emissions from combustion processes, including vehicle engines, remains a challenge particularly for systems operating at high air-to-fuel ratios (so-called ‘lean’ combustion). The current “3-way”, precious metal-based catalytic converters are unable to selectively reduce NOx with reductants (e.g., CO and residual unburned hydrocarbon) in the presence of excess O₂. In the last few years, worldwide environmental regulations regarding NOx emissions from diesel engines (inherently operated ‘lean’) have become significantly more stringent resulting in considerable research efforts to reduce NOx under the highly oxidizing engine operation conditions. Urea selective catalytic reduction (SCR) and non-thermal plasma assisted NOx reduction have been explored as possible technologies. In recent years, alkaline and alkaline earth oxide-based NOx storage/reduction catalysts (especially BaO/Al₂O₃) have been developed, and have shown promising activities for lean-NOx reduction [1,2].
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 15020111
- Report Number(s):
- PNNL-SA-44157; 6695; VT0401000; TRN: US200519%%186
- Resource Relation:
- Conference: 229th ACS National Meeting, San Diego, March 13-17, 2005, Book of Abstracts, 229(Pt. 1):Fuel 163
- Country of Publication:
- United States
- Language:
- English
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