Monitoring the High-temperature Oxidation Stability of Ester Aviation Lubricating Base Oil using High-pressure Differential Scanning Calorimetry

摘要:

选用癸二酸二异辛酯（DIOS）航空润滑油基础油作为研究对象,借助高温氧化加速模拟装置,结合理化性能检测和高压差示扫描量热法（PDSC）评定,重点考察了高温作用下油样性能及其氧化安定性的变化规律.结果显示：当作用温度在180~250℃范围,油样的运动黏度.ν40由10.99 mm2/s下降到10.59 mm2/s,衰减值为0.40mm2/s,而当作用温度超过250℃后,油样的黏度和酸值都急剧下降,至300℃时黏度值为8.78mm2/s,衰减幅度达到20.62%;酸值由250℃时的1.16mg KOH/g增大至300℃时的12.44mg KOH/g;说明高温,尤其是发动机运转过程中的热点温度是导致油品品质变化的主要原因.利用PDSC获取实验油样的起始氧化温度（IOT）和氧化诱导期（OIT）,IOT和OIT的变化趋势进一步验证了温度越高,油样的氧化安定性越差;同时,利用Ozawa法和Kissinger法计算了油品氧化的反应活化能及动力参数,与IOT和OIT值评价油品氧化安定性的结果相符,表明从动力学角度评价油样的氧化安定性也是可行的.

In this paper,diisooctyl sebacate（DIOS）aviation lubricating base oil was chosen as the research object.By means of high-temperature oxidation accelerated simulator,combining with the physicochemical properties test and high-pressure differential scanning calorimetry（PDSC）assessment,the oxidation stability changing rules of samples under high-temperature were emphatically researched.Results showed that：when the temperature was in the range of 180℃to 250℃,the kinematic viscosity.ν40value of samples was reduced from 10.99mm2/s to 10.59mm2/s and the reduction was 0.40mm2/s.When the temperature was over 250 ℃,the viscosity and acid value of oil declined sharply,the viscosity value was only 8.78mm2/s at 300 ℃ and the degree of reduction was up to 20.62%.The acid value was increased from 1.16mgKOH/g at 250 ℃to 12.44mgKOH/g at 300℃.It meant that high temperature,especially the hot spots in the process of engine operation temperature was the main reason leading to the disintegration of lubricants.The initial oxidation temperature（IOT）and oxidation induction time（OIT）of samples were calculated by PDSC,and the trend of IOT and OIT further validated that the higher of the temperature,the worse of the oxidation stability.Meanwhile,the Ozawa and Kissinger methods were used to calculate the reaction activation energy and dynamic parameters,and the experimental results were consistent with the IOT and OIT value evaluation,so it was also feasible from the perspective of dynamic to evaluate the oxidation stability of oil.

作者:

卞森 费逸伟 姚婷 杨宏伟 姜会泽 郭峰

BIAN Sen FEI Yiwei YAO Ting YANG Hongwei JIANG Huize GUO Feng(Department of Aviation Oil and Material, Air Force Logistics Institute, Xuzhou 221000, China Huangshan University, Huangshan 245041, China)

机构地区:

空军勤务学院航空油料物资系 黄山学院

出处:

《betway官方app 学报：自然科学版》 CAS 北大核心 2016年第5期65-69,共5页

基金:

江苏省青年基金项目(BK20150166)

关键词:

酯类航空润滑油基础油 高温 高压差示扫描量热法 氧化安定性 活化能

ester aviation lubricating base oil high-temperature high-pressure differential scanning calorimetry oxidation stability activation energy

分类号:

TE626.34 [石油与天然气工程—油气加工工程]

利用PDSC法监测酯类航空润滑油基础油的高温氧化安定性.pdf