Oxygenated biofuels such as fatty acid methyl esters or ethanol are incorporated in larger and larger amounts into conventional hydrocarbon fuels for use in internal combustion and jet engines. The use of these alternative fuels, along with new engine technology, results in an increased production of toxic pollutants among which aldehydes are the most abundant. The present study focuses on the kinetic modeling of acetaldehyde pyrolysis and oxidation. Based on new ignition delay-time measurements obtained in shock tube and the data from the literature, a comprehensive validation database was assembled. Available kinetic parameters for the most important chemical reactions are reviewed and an updated reaction model is proposed. The new reaction model enables reproducing most of the trends observed experimentally and constitutes an overall improvement as compared to standard detailed chemical models including Aramco 2.0, CaltechMech, and JetSurf.

中文翻译：

---

乙醛高温热解氧化反应模型的更新

氧化的生物燃料，例如脂肪酸甲酯或乙醇，越来越多地加入到用于内燃机和喷气发动机的常规碳氢化合物燃料中。这些替代燃料的使用以及新的发动机技术导致有毒污染物的产生增加，其中醛类最为丰富。本研究的重点是乙醛热解和氧化的动力学模型。根据在激波管中获得的新点火延迟时间测量值和文献数据，组装了一个综合验证数据库。回顾了最重要的化学反应的可用动力学参数，并提出了更新的反应模型。