Studies of Structured Catalytic Reactors

氨在铂或铂铑催化剂上的催化氧化对于硝酸的制造和稀燃发动机（如柴油和天然气燃料）的催化废气处理系统都是至关重要的反应。在第一种应用中，工业上通常使用由铂和铑合金组成的纱布型催化剂将NH3氧化为NO。一氧化二氮是氨氧化过程的副产品。虽然它不是一种有毒物质，尤其是在这个过程中释放到大气中的水平，但它仍然是一种强烈的温室气体，其全球变暖潜力约为二氧化碳的310倍。目前，为了最大限度地减少氨氧化反应器中N2O的排放，可以在纱布层后添加辅助催化剂5。这种催化剂通常呈颗粒状或拉氏环状。目前，人们对这一过程非常感兴趣，特别是在阿尔伯塔省，那里可以通过减少一氧化二氮来获得大量的温室气体排放积分。这项工作的目标是：

The catalytic oxidation of ammonia over platinum or platinum-rhodium catalysts is a crucial reaction for both the manufacture of nitric acid and in the catalytic exhaust gas after treatment systems for lean burn engines (e.g. with Diesel and natural gas fuels). In the first application, the oxidation of NH3 to NO is typically carried out industrially using a gauze type catalyst, which is composed of an alloy of platinum and rhodium. Nitrous oxide is a byproduct of the ammonia oxidation process. Although it is not a toxic substance, especially at the levels released to the atmosphere in this process, it is nonetheless a strong greenhouse gas, with a global warming potential about 310 times that of carbon dioxide. Currently, to minimize emissions of N2O from ammonia oxidation reactors, an auxiliary catalyst may be added after the gauze layers5. This catalyst is often in the form of pellets or Rashig ring in shape. There is currently great interest in this process, especially in Alberta, where significant greenhouse gas emission credits can be claimed for N2O abatement. The objectives of this work are: