在高温条件下N-多德干的早期氧化动力学
Teng Zhang1, Kun Yang1, Danyang Liu1
1Beijing Institute of Technology, Beijing 100081, China.
The journal of physical chemistry. A
|December 11, 2024
概括
在高温下n-多德干的氧化形成了氧化物种,在碳-碳键断裂之前. 这项研究揭示了关键反应途径,促进了对航空燃料燃烧动力学的理解.
科学领域:
- 化学动力学 化学动力学
- 燃烧科学 燃烧科学
- 航空航天工程 航空航天工程
背景情况:
- n-多德干 (C12H26) 是高性能航空发动机中航空煤油的关键替代燃料.
- 了解n-多德的高温燃烧动力学对于航空航天应用至关重要.
研究的目的:
- 用第一原理分子动力学研究n-多德的高温氧化机制.
- 阐明早期的氧化途径,并确定关键反应类型和涉及的物种.
主要方法:
- 采用了第一原则的分子动力学 (MD) 模拟.
- 在高于临界点的温度下分析了n-多德的氧化过程.
主要成果:
- n-多德干氧化形成有氧化C12物种与CO, -OH, -O-和-COOH组,释放大量的能量.
- 在C-C键解离之前确定了四种主要反应类型:H抽象,H添加,分子内H转移和O添加.
- 发现H抽象和O添加反应发生的频率最高,O2分子和各种基因起着至关重要的作用.
结论:
- 这项研究为n-dodecane的早期氧化反应机制提供了第一个详细的调查.
- 提供了对长链基的复杂氧化动态的新见解,这与航空燃料燃烧有关.
相关概念视频
Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate
10.9K
Alkenes can be dihydroxylated using potassium permanganate. The method encompasses the reaction of an alkene with a cold, dilute solution of potassium permanganate under basic conditions to form a cis-diol along with a brown precipitate of manganese dioxide.
10.9K
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
9.8K
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
9.8K
Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids
5.6K
Diols are compounds with two hydroxyl groups. In addition to syn dihydroxylation, diols can also be synthesized through the process of anti dihydroxylation. The process involves treating an alkene with a peroxycarboxylic acid to form an epoxide. Epoxides are highly strained three-membered rings with oxygen and two carbons occupying the corners of an equilateral triangle. This step is followed by ring-opening of the epoxide in the presence of an aqueous acid to give a trans diol.
5.6K
Oxidation of Alcohols
12.8K
In this lesson, the oxidation of alcohols is discussed in depth. The various reagents used for oxidation of primary and secondary alcohols are detailed, and their mechanism of action is provided.
The process of oxidation in a chemical reaction is observed in any of the three forms:
The process of oxidation in a chemical reaction is observed in any of the three forms:
12.8K
Combustion Energy: A Measure of Stability in Alkanes and Cycloalkanes
6.2K
The low reactivity in alkanes can be attributed to the non-polar nature of C–C and C–H σ bonds. Alkanes, therefore, were initially termed as “paraffins,” derived from the Latin words: parum, meaning “too little,” and affinis, meaning “affinity.”
Alkanes undergo combustion in the presence of excess oxygen and high-temperature conditions to give carbon dioxide and water. A combustion reaction is the energy source in natural gas, liquified...
Alkanes undergo combustion in the presence of excess oxygen and high-temperature conditions to give carbon dioxide and water. A combustion reaction is the energy source in natural gas, liquified...
6.2K
Oxidative Cleavage of Alkenes: Ozonolysis
9.9K
In ozonolysis, ozone is used to cleave a carbon–carbon double bond to form aldehydes and ketones, or carboxylic acids, depending on the work-up.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
9.9K


