SBIR Phase I: Selective Catalytic Oxidation of Ammonia to Nitrogen for Hot Exhaust Treatment

SBIR 第一阶段：氨选择性催化氧化制氮用于热废气处理

• 批准号: 1142771
• 负责人: Richard Long
• 金额: $ 15万
• 依托单位: NEXTECH MATERIALS LTD
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-01-01 至 2012-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1142771&HistoricalAwards=false
• 关键词: SBIR; Phase; Selective; Catalytic; Oxidation

This Small Business Innovation Research (SBIR) Phase I project will investigate a new family of low-cost non-precious metal ammonia selective oxidation catalysts for use in selective catalytic reduction (SCR) systems. The selective catalytic reduction of NO with ammonia/urea is widely applied to combustion exhaust treatment for abating NOx emissions in power plants and diesel engine vehicles. A common problem of using the SCR technology is ammonia slip. Under conditions of incomplete NO conversion or exhaust temperature upswings, NH3 will slip into the exhaust, resulting in a number of environmental problems. This selective catalytic oxidation (SCO) technology can convert the toxic ammonia to nitrogen and water without introducing other reactants into the gas mixture. In this project, powder catalysts will be synthesized and tested at NexTech under simulated diesel engine exhaust atmospheres and characterized by physical and chemical methods.The broader/commercial impacts of this research are to solve the NH3 slip problem existing in the diesel engine SCR system with low cost, and to help reduce NOX emissions by greater than 90% in power plants when stoichiometric or excess amount of ammonia is used in the SCR process. The generated information can also provide new insights into understanding activation process of small molecules, such as NH3, NO, NO2 and O2, on the non-precious metal catalyst surface with acid and redox sites, enabling development of better catalysts for further emission reduction in the future.

该小型企业创新研究（SBIR）第一阶段项目将研究一种用于选择性催化还原（SCR）系统的新型低成本非贵金属氨选择性氧化催化剂。用氨/尿素选择性催化还原NO被广泛应用于燃烧废气处理以减少发电厂和柴油发动机车辆中的NOx排放。使用SCR技术的一个常见问题是氨泄漏。 在NO转化不完全或排气温度升高的条件下，NH3将滑入排气中，导致许多环境问题。这种选择性催化氧化（SCO）技术可以将有毒的氨转化为氮气和水，而无需向气体混合物中引入其他反应物。在本项目中，粉末催化剂将在NexTech合成并在模拟柴油机排气气氛下进行测试，并通过物理和化学方法进行表征。本研究的更广泛/商业影响是以低成本解决柴油机SCR系统中存在的NH3泄漏问题，并且当在SCR工艺中使用化学计量或过量的氨时，有助于在发电厂中将NOX排放减少90%以上。所产生的信息还可以为理解具有酸性和氧化还原位点的非贵金属催化剂表面上的小分子（如NH3，NO，NO2和O2）的活化过程提供新的见解，从而能够开发出更好的催化剂，用于未来的进一步减排。