• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Proceedings of the 2009 spring technical conference of the ASME Internal Combustion Engine Division >KINETIC STUDY OF THE THERMO-OXIDATIVE DEGRADATION OF SQUALANE (C_(30)H_(62)) MODELLING THE BASE OIL OF ENGINE LUBRICANTS
【24h】

KINETIC STUDY OF THE THERMO-OXIDATIVE DEGRADATION OF SQUALANE (C_(30)H_(62)) MODELLING THE BASE OIL OF ENGINE LUBRICANTS

机译：角蛋白（C_（30）H_（62））热氧化降解动力学的动力学研究

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

On the basis of ongoing research conducted on the clarification of processes responsible for lubricant degradation in the environment of piston grooves in EGR diesel engines, an experimental investigation was aimed to develop a kinetic model which can be used for the prediction of lubricant oxidative degradation correlated to endurance test conducted on engines. Knowing that base oils are a complex blend of paraffins and naphtenes with a wide range of sizes and structures, their chemistry analysis during the oxidation process can be highly convoluted. In the present work, investigations were carried out with the squalane (C_(30)H_(62)) chosen for its physical and chemical similarities with the lubricant base oils used during the investigations. Thermo-oxidative degradation of this hydrocarbon was conducted at atmospheric pressure in a tubular furnace, while varying temperature and duration of the tests in order to establish an oxidation reaction rate law.rnThe same experimental procedures was applied to squalane doped with two different phenolic antioxidants usually present in engine oil composition: 2,6-di-tert-butyl-4-methylphenol (BHT), and octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate (OBHP). Thus, the effect of both antioxidants on the oxidation rate law was investigated.rnData analysis of the oxidized samples (FTIR spectroscopy, gas chromatography/mass spectrometry GC/MS) allowed to rationalize the thermo-oxidative degradation of squalane. The resulting kinetic modelling provides a practical analytical tool to follow the thermal degradation processes, which can be used for prediction of base oil hydrocarbon ageing. If experiments confirmed the role of phenolic additives as an affective agent to lower oxidation rates, the main results lay in the observation of a threshold temperature where a reversed activity of these additives was observed.
机译：在澄清EGR柴油机活塞槽环境中造成润滑油降解的过程的基础上进行的持续研究的基础上，旨在通过实验研究建立一个动力学模型，该动力学模型可用于预测与润滑油相关的润滑油氧化降解。在发动机上进行的耐久性测试。知道基础油是链烷烃和环烷烃的复杂混合物，具有各种尺寸和结构，因此在氧化过程中对它们的化学分析可能会非常复杂。在本工作中，对角鲨烷（C_（30）H_（62））进行了研究，该角鲨烷与研究期间使用的润滑油基础油的物理和化学相似性。在大气压下在管式炉中对该烃进行热氧化降解，同时改变测试温度和持续时间以建立氧化反应速率定律。rn通常将相同的实验步骤应用于掺杂有两种不同酚类抗氧化剂的角鲨烷包含在发动机油组合物中的物质：2,6-二叔丁基-4-甲基苯酚（BHT）和十八烷基-3-（3,5-二叔丁基-4-羟苯基）丙酸酯（OBHP）。因此，研究了两种抗氧化剂对氧化速率定律的影响。氧化样品的数据分析（FTIR光谱，气相色谱/质谱GC / MS）可以合理地调节角鲨烷的热氧化降解。所得的动力学模型为跟踪热降解过程提供了实用的分析工具，可用于预测基础油烃的老化。如果实验证实酚醛添加剂作为降低氧化速率的影响剂的作用，则主要结果在于观察阈值温度，观察到这些添加剂的活性相反。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号