煤液化基础油抗氧化剂协同效应探讨:从抗氧化性和热稳定性的角度看

IF 3.1 2区 化学 Q2 CHEMISTRY, ANALYTICAL
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引用次数: 0

摘要

煤制油(CTL)基础油是一种由煤制成的高品质润滑油基础油。然而,其氧化稳定性差、使用寿命短,限制了它的应用。评估氧化稳定性时采用了加压差示扫描量热法和旋转炸弹氧化试验。热重分析用于热稳定性评估。结果表明,合理搭配商用抗氧化剂可显著提高 CTL3 和 CTL6 这两种典型 CTL 基础油的氧化稳定性和热稳定性。从热解动力学和热解机理的角度研究了抗氧化剂在 CTL 基础油中的协同作用机理。对于 CTL3,与纯 CTL3 相比,添加复合抗氧化剂 2,6-二叔丁基-4-甲基苯酚(T501)和正苯基-1-萘胺(T531)会导致氧化诱导时间(OIT)增加近 8 倍,活化能增加 33.4%。对于 CTL6,添加复合抗氧化剂二烷基二硫代磷酸酯(T203)和二苯胺(L57)后,与纯 CTL6 相比,OIT 几乎增加了 10 倍,活化能增加了 10.9%。所设计的商用抗氧化剂化合物体系具有极佳的协同效应,其协同机制也得到了说明。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Exploration on the synergistic effect of antioxidants for coal-to-liquid base oil: From the perspective of oxidation resistance and thermal stability

Exploration on the synergistic effect of antioxidants for coal-to-liquid base oil: From the perspective of oxidation resistance and thermal stability

Coal-to-liquid (CTL) base oil is a high-quality lubricant base oil made from coal. However, its poor oxidation stability and short service life limit its application. Pressurized differential scanning calorimetry and Rotary bomb oxidation test are utilized for the evaluation of oxidation stability. Thermogravimetric analysis is performed for the thermal stability assessment. The results showed the reasonable combination of commercial antioxidants can significantly improve the oxidative and thermal stability of two typical CTL base oils, CTL3 and CTL6. The synergistic mechanism of antioxidants in CTL base oil was studied from the perspective of pyrolysis kinetics and pyrolysis mechanism. For CTL3, adding the compound antioxidant 2,6-di-tert-butyl-4-methylphenol (T501) and n-phenyl-1-naphthylamine (T531) results in an almost eightfold increase in oxidation induction time (OIT) and a 33.4 % increase in activation energy compared to pure CTL3. For CTL6, adding the compound antioxidant dialkyl dithiophosphate (T203) and diphenylamine (L57) results in an almost tenfold increase in OIT and a 10.9 % increase in activation energy compared to pure CTL6. The designed commercial antioxidant compound systems had excellent synergistic effects and the synergistic mechanisms were illustrated.

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来源期刊
Thermochimica Acta
Thermochimica Acta 化学-分析化学
CiteScore
6.50
自引率
8.60%
发文量
210
审稿时长
40 days
期刊介绍: Thermochimica Acta publishes original research contributions covering all aspects of thermoanalytical and calorimetric methods and their application to experimental chemistry, physics, biology and engineering. The journal aims to span the whole range from fundamental research to practical application. The journal focuses on the research that advances physical and analytical science of thermal phenomena. Therefore, the manuscripts are expected to provide important insights into the thermal phenomena studied or to propose significant improvements of analytical or computational techniques employed in thermal studies. Manuscripts that report the results of routine thermal measurements are not suitable for publication in Thermochimica Acta. The journal particularly welcomes papers from newly emerging areas as well as from the traditional strength areas: - New and improved instrumentation and methods - Thermal properties and behavior of materials - Kinetics of thermally stimulated processes
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