Mixed Conducting Membrances For Nox Decomposition in Automobile Exhausts

用于汽车尾气中氮氧化物分解的混合导电膜

• 批准号: 9200988
• 负责人: Anthony Sammells
• 金额: $ 25.98万
• 依托单位: Eltron Research, Inc.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-08-15 至 1995-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9200988&HistoricalAwards=false
• 关键词: Mixed; Conducting; Membrances; Nox; Decomposition

This program involves the design and synthesis of mixed ionic and electronic conducting membranes that promote decomposition of nitrogen oxides in automobile exhaust. The strategy depends on a perovskite catalyst to decompose the nitrogen oxide and an oxide-ion "pump" to remove oxygen from the active site. The conducting membrane and catalytic membrane may be the same or different materials. Research objectives include optimization of the catalysts in solid-state electrolytic cells and optimization of the components of the mixed conducting membranes. The research clarifies the mechanism of decomposition of nitrogen oxides at catalytic sites and the conditions required to maintain long-term activity. Characteristics of the solid-state membrane necessary for achieving rapid oxide-ion mediation away from the reaction site are identified; these are optimized for operation at representative automobile exhaust temperatures. This is an SBIR Phase II effort. It leads to a long-life, low-cost, membrane converter for removing nitrogen oxides from automobile exhausts. This technology is especially applicable to lean-burn engines, which are expected to become dominant in the future because of their high fuel efficiency.//

该项目涉及设计和合成混合离子和电子导电膜，促进汽车尾气中氮氧化物的分解。 该策略依赖于钙钛矿催化剂来分解氮氧化物和氧化物离子“泵”来从活性位点去除氧气。 导电膜和催化膜可以是相同或不同的材料。 研究目标包括固态电解池中催化剂的优化和混合导电膜成分的优化。 该研究阐明了氮氧化物在催化位点的分解机制以及维持长期活性所需的条件。 确定了实现快速氧化离子远离反应位点所需的固态膜的特性；它们针对典型的汽车尾气温度下的运行进行了优化。 这是 SBIR 第二阶段的工作。 它带来了一种长寿命、低成本的膜转换器，用于去除汽车尾气中的氮氧化物。 该技术特别适用于稀薄燃烧发动机，由于其高燃油效率，预计未来将占据主导地位。//