AGS-PRF: Constraining Ammonia Emission Sources in Urban Areas Utilizing Nitrogen Stable Isotopes

AGS-PRF：利用氮稳定同位素限制城市地区的氨排放源

• 批准号: 1624618
• 负责人: Wendell Walters
• 金额: $ 8.6万
• 依托单位: Walters Wendell W
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-12-01 至 2018-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1624618&HistoricalAwards=false
• 关键词: AGS; PRF; Constraining; Ammonia; Emission

Ammonia emissions that produce and neutralize aerosols are increasing in the US . While the agricultural ammonia sources from fertilizer use dominate and are well studied, field studies show that ammonia produced from fossil fuel use in urban areas is underrepresented in current models. This may be a result of the use of various catalytic NOx scrubber technologies in vehicles and power-plants to reduce air pollution that can increase ammonia production, particularly in urban areas. The proposal will use isotope specific ammonia measurements to quantify the fossil fuel related sources in Rhode Island, Indianapolis and Philadelphia. The results will help determine how fossil energy use and and pollution abatement technologies are affecting urban ammonia sources and human health.The research will use isotopic (15N/14N) studies to develop fingerprinting tools for fossil ammonia sources from automobile engines, power plants, and catalytic NOx scrubbers, agricultural and oceanic sources. Field studies in Providence, Indianapolis, and Rhode Island will be performed to quantitatively attribute the ammonia sources using the 15N/14N observations of ammonia. State of the art instrumentation will be used for the measurements and the results will resolve the outstanding debate on how much fossil combustion is contributing to the ammonia budget and how catalytic NOx scrubber technologies are affecting them.

在美国，产生和中和气溶胶的氨排放量正在增加。虽然来自化肥使用的农业氨来源占主导地位，并得到了很好的研究，但实地研究表明，在城市地区使用化石燃料产生的氨在目前的模型中代表性不足。这可能是由于在车辆和发电厂中使用了各种催化NOx洗涤器技术，以减少空气污染，从而增加氨的产量，特别是在城市地区。该提案将使用同位素特定氨测量来量化罗得岛、印第安纳波利斯和费城的化石燃料相关来源。研究结果将有助于确定化石能源的使用和污染减排技术如何影响城市氨源和人类健康。该研究将使用同位素（15 N/14 N）研究来开发汽车发动机、发电厂和催化NOx洗涤器、农业和海洋来源的化石氨源的指纹识别工具。将在普罗维登斯、印第安纳波利斯和罗得岛进行实地研究，以使用氨的15 N/14 N观测值定量确定氨源。 最先进的仪器将用于测量，结果将解决关于化石燃烧对氨预算的贡献以及催化NOx洗涤器技术如何影响它们的悬而未决的争论。