Mixed Conducting Membrances For Nox Decomposition in Automobile Exhausts

本项目涉及混合离子型聚合物的设计与合成， 和电子传导膜， 汽车尾气中的氮氧化物。 战略 依靠钙钛矿催化剂分解氮 氧化物和氧化物离子“泵”，以从活性物质中除去氧。 绝佳的价钱 导电膜和催化膜可以 相同或不同的材料。 研究目标包括 固态电解中催化剂的优化 细胞和优化的成分的混合 导电膜 该研究阐明了 氮氧化物在催化位点的分解， 保持长期活动所需的条件。 固态膜所需的特性 实现远离反应的快速氧化离子介导 确定了站点;这些站点经过优化， 典型的汽车排气温度。 这是SBIR第二阶段的工作。 它能延长寿命， 低成本的膜转换器， 汽车尾气。 这项技术特别适用于 稀薄燃烧发动机，预计将成为主导， 因为它的高燃油效率。

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.//