The gas phase atmospheric photolysis and reactions of key alkyl nitrates and their role in NOy partitioning.

关键硝酸烷基酯的气相大气光解和反应及其在 NOy 分配中的作用。

基本信息

批准号：
NE/G01972X/1
负责人：
Dudley Shallcross
金额：
$ 52.29万
依托单位：
University of Bristol
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2009
资助国家：
英国
起止时间：
2009 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=NE%2FG01972X%2F1
关键词：
gas phase atmospheric photolysis reactions

项目摘要

Alkyl nitrates play a crucial role in controlling the budgets of secondary organic aerosols, ozone, NOx, NOy and HOx throughout the troposphere and the importance of these families in determining atmospheric composition, the earth's radiative balance and any future change in climate can not be overemphasised. A number of recent regional and global model studies have demonstrated that vital kinetic and photolytic parameters, especially for the alkyl nitrates formed from the oxidation of biogenic volatile organic compounds, are missing, preventing atmospheric chemical models from describing oxidant chemistry well and hence determining lifetimes of key greenhouse gases and surface pollutants. These kinetic and photolytic parameters include their loss rate via photolysis, loss rate via reaction with OH and O3 and whether NOx is released on reaction with OH and O3. In this study a combination of Turbulent-Flow Chemical Ionisation Mass Spectrometry coupled with a Gas chromatography- electron capture detector (GC-ECD) for the detection of alkyl nitrates will be used to characterise the kinetics of reaction with OH of key alkyl nitrates, whilst a relative rate technique coupled with GC-ECD and GC-MS will be used to characterise the kinetics of reaction of unsaturated organic nitrates with O3 and a state of the art flash photolysis cavity ring system will be used to measure the photolysis and quantum yield of organic nitrates. Such data will be incorporated into models describing the troposphere and compared with available measurements. The proposed work will be crucial to the understanding of the effects of biogenic volatile organic compounds on atmospheric pollution and climate change.

硝酸烷基酯在控制整个对流层二次有机气溶胶、臭氧、NOx、NOy 和 HOx 的预算方面发挥着至关重要的作用，这些家族在确定大气成分、地球辐射平衡和任何未来气候变化方面的重要性怎么强调都不为过。最近的一些区域和全球模型研究表明，重要的动力学和光解参数，特别是生物挥发性有机化合物氧化形成的硝酸烷基酯的参数缺失，导致大气化学模型无法很好地描述氧化剂化学，从而无法确定氧化剂的寿命。主要温室气体和地表污染物。这些动力学和光解参数包括光解损失率、与 OH 和 O3 反应的损失率以及与 OH 和 O3 反应是否释放 NOx。在本研究中，结合使用湍流化学电离质谱法与气相色谱-电子捕获检测器 (GC-ECD) 检测硝酸烷基酯，将用于表征关键硝酸烷基酯与 OH 的反应动力学，同时结合 GC-ECD 和 GC-MS 的相对速率技术将用于表征不饱和有机硝酸盐与 O3 的反应动力学，并且将使用最先进的闪速光解腔环系统来表征测量有机硝酸盐的光解作用和量子产率。这些数据将被纳入描述对流层的模型中，并与可用的测量结果进行比较。拟议的工作对于了解生物挥发性有机化合物对大气污染和气候变化的影响至关重要。

项目成果

期刊论文数量（10）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Tropospheric ozone production regions and the intercontinental origins of surface ozone over Europe

DOI：
10.1016/j.atmosenv.2015.04.049
发表时间：
2015-07-01
期刊：
ATMOSPHERIC ENVIRONMENT
影响因子：
5
作者：
Derwent, Richard G.;Utembe, Steven R.;Shallcross, Dudley E.
通讯作者：
Shallcross, Dudley E.

The effect of the novel HO 2 + NO ? HNO 3 reaction channel at South Pole, Antarctica

新型 HO 2 NO 的效果？

DOI：
10.1017/s0954102012000144
发表时间：
2012
期刊：
Antarctic Science
影响因子：
1.6
作者：
Boxe C
通讯作者：
Boxe C

The first UK measurements of nitryl chloride using a chemical ionization mass spectrometer in central London in the summer of 2012, and an investigation of the role of Cl atom oxidation

DOI：
10.1002/2014jd022629
发表时间：
2015-06
期刊：
Journal of Geophysical Research: Atmospheres
影响因子：
0
作者：
T. Bannan;A. M. Booth;A. Bacak;J. Muller;K. Leather;Michael Le Breton;B. Jones;D. Young;H. Coe;J. Allan;S. Visser;J. Slowik;M. Furger;A. Prevot;James D. Lee;R. Dunmore;J. Hopkins;J. Hamilton;A. Lewis;L. Whalley;T. Sharp;D. Stone;D. Heard;Z. Fleming;R. Leigh;D. Shallcross;C. Percival
通讯作者：
T. Bannan;A. M. Booth;A. Bacak;J. Muller;K. Leather;Michael Le Breton;B. Jones;D. Young;H. Coe;J. Allan;S. Visser;J. Slowik;M. Furger;A. Prevot;James D. Lee;R. Dunmore;J. Hopkins;J. Hamilton;A. Lewis;L. Whalley;T. Sharp;D. Stone;D. Heard;Z. Fleming;R. Leigh;D. Shallcross;C. Percival

Determination of gas-phase ozonolysis rate coefficients of a number of sesquiterpenes at elevated temperatures using the relative rate method.

使用相对速率法测定高温下多种倍半萜烯的气相臭氧分解速率系数。