Chemical Kinetics of Phosphorus-Containing Compounds Used as Fire Suppressants and Chemical Agent Surrogates

用作灭火剂和化学制剂替代品的含磷化合物的化学动力学

基本信息

批准号：
1706825
负责人：
Eric Petersen
金额：
$ 27万
依托单位：
Texas A&M Engineering Experiment Station
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2017
资助国家：
美国
起止时间：
2017-08-01 至 2020-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1706825&HistoricalAwards=false
关键词：
Chemical Kinetics Phosphorus Containing Compounds

项目摘要

Compounds containing phosphorus have modern, global ramifications because of their use as promising fire suppressants. The alternate usage of these phosphorous compounds as promising replacements for halon-based fire suppressants provides additional, far-reaching impact and a strong need for sufficient understanding of their chemical behavior. These compounds can also be used as chemical agent simulants to understand more about their behavior in flames. In this research project, the chemistry of phosphorus-based molecules will be studied experimentally. The primary result will be an accurate representation of the important chemical reactions that occur in flames containing these phosphorous compounds. Improved models can then be employed by engineers and scientists. This multidisciplinary project will allow opportunities for the graduate students, postdoctoral researcher, and undergraduate students working on the project to publish and attend conferences in fields in which they might not normally participate.The compounds of interest to this project are phosphorus-based. A major aspect of accurately predicting their combustion behaviors lies in the accuracy of the phosphorus-oxidation kinetics sub-mechanism. Despite their current importance, there are few kinetics data at combustion conditions for these compounds, and the chemical kinetic reaction rate coefficients are not at all well known. This fundamental study will focus on making direct measurements of the reaction rate constants of key reactions in the phosphorus oxidation sub-mechanism. The fundamental chemical kinetics information produced from this work will be one-of-a-kind and will provide results that are much needed for simulating the effects of P-containing compounds in a combustion environment. By using a shock tube to produce the high-temperature conditions (1000 to 2000 K), laser absorption measurements of key intermediate species such as PO2, HOPO, H2O, and HOPO2 will be performed. New spectroscopic information thereon will be obtained, and laser absorption measurements of their concentrations will be performed for the first time in a shock tube. Such measurements will lead to determination of the reaction rates of several important reactions (up to 6) for the first time. The successful completion of this project will greatly advance the predictive capabilities for the combustion behavior of several phosphorus-containing species of practical and topical interest.

含有磷的化合物具有现代的全球影响，因为它们用作有前途的抑制剂。这些磷化合物的替代用法是基于Halon的抑制剂的有前途的替代品提供了额外的，深远的影响，并且强烈需要充分理解其化学行为。这些化合物也可以用作化学剂模拟物，以更多地了解它们在火焰中的行为。在该研究项目中，将通过实验研究基于磷的化学分子。主要结果将是在包含这些磷化合物的火焰中发生的重要化学反应的准确表示。然后，改进的模型可以由工程师和科学家使用。这个多学科项目将为研究生，博士后研究人员和本科生从事该项目的本科生提供机会，以在他们通常不参加的领域发表和参加会议。准确预测其燃烧行为的一个主要方面在于磷 - 氧化动力学亚机制的准确性。尽管目前的重要性，但对于这些化合物的燃烧条件下的动力学数据很少，而且化学动力学反应速率系数尚不清楚。这项基本研究将集中于对磷氧化亚机制中关键反应的反应速率常数进行直接测量。这项工作产生的基本化学动力学信息将是独一无二的，它将提供迫切需要的结果，以模拟燃烧环境中含P的含P的影响。通过使用冲击管产生高温条件（1000至2000 K），将执行关键中间物种（例如PO2，HOPO，H2O和HOPO2）的激光吸收测量值。将获得新的光谱信息，并将在冲击管中首次对其浓度进行激光吸收测量。这样的测量将导致首次确定几种重要反应的反应速率（最多6）。该项目的成功完成将极大地提高几种含磷的实用和局部兴趣物种的燃烧行为的预测能力。