A Silicon Microreactor for Transient Spatially Resolved FTIR and Thermal Analysis of NOx Storage Reduction Catalysts and Reactors

目前正在开发CBET-0828852 BaertschNOBXB储存减少(NSR)催化反应器作为后处理系统，以减少稀燃柴油发动机的NOBXB排放，以满足将于2007年和2010年实施的严格的EPA法规。基于瞬时非等温整体式反应器内基本反应动力学和详细的热质传递的预测模型将为发动机制造商提供一种机制，以快速开发、优化并最终控制柴油发动机减排系统，以满足这些苛刻的法规。开发复杂的循环NSR系统的此类模型需要对整体后处理系统中的瞬时和空间变化的动力学和热行为进行实验研究和验证。然而，将催化剂表面表征技术和热测量能力结合到整体反应器几何形状中的方法是不可用的。在NSR循环中，催化剂表面和反应器温度都随时间和在整体中的位置而变化，需要一个严格的预测模型来捕捉这些空间和时间现象。因此，这样的空间和时间反应信息必须是可用的，并且在实验上是可测量的，以用于模型验证和参数估计。智能优点PI的目标是利用为MEMS(微电子机械系统)开发的硅微制造技术带来的机会，开发一种用于表征动态NSR催化系统的新型微反应器。将开发一个集成的微系统，以便能够在NSR催化循环中对高比表面积纳米结构负载型金属和氧化物催化剂进行UO空间分辨和瞬时FTIR分析，同时进行非等温NSR过程的U空间分辨和瞬时温度测量，以及在反应条件和空间时间复制后处理整体反应器U。这项工作将直接影响普渡大学的教职员工和学生与康明斯公司的研发团队之间的合作，该团队致力于开发改进的发动机/催化剂系统，以减少柴油发动机的NOBXB，以满足即将到来的EPA标准。通过这项工作产生更广泛的影响，将开发新的能力，将催化剂表面表征技术(特别是高温下的原位FTIR)和热测量能力整合到整体和填充床反应器几何结构中，以改进催化剂设计和分析。此外，PI将继续努力通过工程女性项目、指导关系和包括普渡EDGE夏令营在内的K-12外展项目，招募、留住和支持女性和少数族裔学生学习工程。工程教学资源将由本科生以MEMS学习模块的形式开发，并在NSF资助的NanHUB(HTUwww.nan.orgUTH)上传播，作为其在线纳米电子学课程的一部分。

CBET-0828852BaertschNOBXB storage reduction (NSR) catalytic reactors are currently being developed as after treatment systems to reduce NOBXB emissions from lean burn diesel engines to meet stringent EPA regulations to be imposed in 2007 and 2010. Predictive models based on fundamental reaction kinetics and detailed heat and mass transfer within transient non-isothermal monolithic reactors will provide a mechanism for engine manufacturers to rapidly develop, optimize, and ultimately control diesel engine emission reduction systems to meet these demanding regulations. Development of such models for complex, cyclic NSR systems requires experimental investigation and validation of transient and spatially variant kinetic and thermal behavior within a monolith after-treatment system. However, methods for incorporating catalyst surface characterization techniques and thermal measurement capabilities into monolith reactor geometries are not available. Both the catalyst surface and the reactor temperature vary as a function of time and position in the monolith during NSR cycles, and a rigorous predictive model needs to capture these spatial and temporal phenomena. Thus, such spatial and temporal reaction information must be available and measurable experimentally for model validation and parameter estimation. Intellectual Merit The PI aims to take advantage of opportunities emerging from silicon microfabrication technologies developed for MEMS (micro-electro-mechanical systems) to develop a novel microreactor for the characterization of dynamic NSR catalytic systems. An integrated microsystem will be developed to enable combined Uspatially resolved and transient FTIR analysis Uof high-surface area nanostructured supported metallic and oxide catalysts during NSR catalytic cycles, simultaneously with Uspatially resolved and transient temperature measurementsU of the non-isothermal NSR process and Uwithin a geometry and at reaction conditions and space times replicating after-treatment monolith reactorsU. This work will directly impact a collaboration between faculty and students at Purdue University and a research and development team at Cummins Inc. working to develop improved engine/catalyst systems for reducing NOBXB from diesel engines to meet impending EPA standards. Broader Impact Through this work new capabilities for incorporating catalyst surface characterization techniques (specifically in-situ FTIR at elevated temperatures) and thermal measurement capabilities into monolith and packed-bed reactor geometries for improved catalyst design and analysis will be developed. Additionally, on-going efforts by the PI to recruit, retain, and support women and minority students in engineering through the Women in Engineering Program, mentoring relationships, and K-12 outreach programs including the Purdue EDGE summer camp will continue. Engineering teaching resources will be developed by undergraduate students in the form of MEMS learning modules and disseminated on the NSF funded nanoHUB (HTUwww.nano.orgUTH) as part of its on-line nanoelectronics curriculum.