The Development of Sensitive Diagnostics for Formaldehyde ( CH2O) and Formyl (HCO) and their Use in Shock Tube Studies of Reaction Rate Coefficients

甲醛 (CH2O) 和甲酰基 (HCO) 灵敏诊断的发展及其在反应速率系数激波管研究中的应用

• 批准号: 0000145
• 负责人: Ronald Hanson
• 金额: $ 31万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-06-01 至 2003-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0000145&HistoricalAwards=false
• 关键词: Development; Sensitive; Diagnostics; Formaldehyde; CH2O

Reaction involving formaldehyde (CH2O) and formyl (HCO) radical lie on the primary oxidation pathway for methane and other funds, but there are still large uncertainties in the high-temperature rate coefficients of key reactions involving these species. This uncertainty stems largely from instability to measure CH2O and HCO with sufficient sensitivity. To address this situation, sensitive optimal diagnostics to measure CH2O and HCO are developed and used to measure important rate coefficients from shock-tube studies. Formaldehyde is measured using vacuum ultraviolet (VUV) lamp absorption at 174 nm. Formyl is measured using frequency modulation (FM) laser absorption at 614 nm. These techniques are applied to the investigation of several elementary reactions in shock-tube studies and species concentration time-history databases from pyrolysis and oxidation experiments.

甲醛（CH2O）和甲酰基（HCO）自由基参与的反应是甲烷和其他气体的主要氧化途径，但涉及这些物种的关键反应的高温速率系数仍存在很大的不确定性。 这种不确定性很大程度上是由于测量CH2O和HCO的灵敏度不够。 为了解决这种情况下，敏感的最佳诊断测量CH2O和HCO的开发和使用来测量重要的速率系数从激波管的研究。 使用真空紫外（VUV）灯在174 nm处的吸收测量甲醛。 甲酰基使用频率调制（FM）激光吸收在614 nm处测量。 这些技术被应用于调查的几个基本反应的激波管的研究和物种浓度的时间历程数据库从热解和氧化实验。