STUDY ON THERMAL OXIDATION MECHANISM OF ESTER BASE OIL

Abstract

Abstract: The neopentyl glycol diheptanoate was used as a model compound to simulate the thermal oxidation, decomposition and polymerization process of ester aviation base oil at high temperature. Molecular simulation was used to calculate the molecular bond energy of the model compound. Based on the results of oxidation, pyrolysis, polymerization, and the changes of acid value and viscosity, the oxidation mechanism of the model compound was proposed to provide the basic data for the study of the thermal oxidation mechanism of ester lubricating oil.

Key words: aviation lubricating oil, liquid coking, ester base oil, high temperature oxidation, molecular simulation

CLC Number:

References

参考文献 [1] 郑发正，徐新，白雪亮. 润滑油的氧化与对策[J]. 合成润滑材料, 2008, 35(4). 30-32. [2] 颜志光，杨正宇. 合成润滑剂[M]. 中国石化出版社, 1996. [3] 费逸伟，程治升，杨宏伟，等. 酯类合成航空润滑基础油特性分析[J]. 当代化工, 2013(9). 1297-1300. [4] 陈立波，郭绍辉. 酯类合成油的热氧化及其状态监控技术研究进展[J]. 合成润滑材料, 2001(02). 19-24. [5] 杨睿，杜斌，张志凌，等. 润滑油结焦行为的实验室评价[J]. 石油学报(石油加工), 2013(05). 813-817. [6] Siouris S, Shepherd T, Wilson C, et al. Development of an apparatus for the degradation of aviation gas turbine lubricants[J]. Tribology Transactions, 2013, 56(2). 215-223. [7] GJB 563-1988 轻质航空润滑油的腐蚀和氧化安定性测定法[S]. 1988. [8] ASTM D6352-2004. Standard Test Method for Boiling Range Distribution of Petroleum Distillates in Boiling Range from 174?°C to 700?°C by Gas Chromatography[S]. [9] 徐文炳，雷荣孝，楼秀钦. 色谱模拟蒸馏研究及应用[J]. 石化技术与应用, 2001, 19(3). 195-197. [10] GB/T 7304-2014. 石油产品酸值的测定电位滴定法[S]. 2014. [11] GB/T 265-1988. 石油产品运动粘度测定法和动力粘度计算法[S]. 1988. [12] Mousavi P, Wang D, Grant C S, et al. Measuring thermal degradation of a polyol ester lubricant in liquid phase[J]. Industrial & engineering chemistry research, 2005, 44(15). 5455-5464. [13] Lashkhi V L, Shor G I. A colloid-chemical model for the tendency of oils to form high-temperature deposits[J]. Chemistry and Technology of Fuels and Oils, 1992, 28(5). 260-263. [14] Kauffman R E, Feng A, Karasek K R. Coke formation from aircraft turbine engine oils: Part I—deposit analysis and development of laboratory oil coking test[J]. Tribology transactions, 2000, 43(4). 823-829. [15] Jensen R K, Korcek S, Zinbo M. Oxidation and inhibition of pentaerythritol esters[J]. Journal of Synthetic Lubrication, 1984, 1(2). 91-105. [16] Koch B, Jantzen E. Thermal oxidation behaviour of synthetic oils: Basic studies in the polymerization of polyol ester oils[J]. Journal of Synthetic Lubrication, 1987, 4(4). 321-336. [17] Fuchs H J, Zeman A. Polymer formation during thermal‐oxidative ageing of aviation turbine oils[J]. Journal of Synthetic Lubrication, 1993, 10(1). 1-22. [18] Bakunin V N, Parenago O P. A mechanism of thermo‐oxidative degradation of polyol ester lubricants[J]. Journal of Synthetic Lubrication, 1992, 9(2). 127-143.