机组运行中润滑油的多参数测定及特征分析  

Multiparameter measurement and feature analysis of lubricating oil during unit operation

作　　者：曹建平[1] 王小云[1] 王樱[1] 孙志伟[1] 宣征南[1] 

机构地区：[1]广东石油化工学院,广东茂名525000

出　　处：《现代化工》2016年第3期187-190,共4页Modern Chemical Industry

基　　金：广东省石化装备故障诊断重点实验室开放课题(GDUPTKLAB201326)

摘　　要：为研究机组运行中润滑油的性能衰变规律,采用有机元素分析、红外光谱分析、热重分析技术建立了机组运行中润滑油多参数测定方法。获得了润滑油碳氢比、碳硫比、红外光谱特征波长强度比、失重起始温度、失重终止温度、最大失重速率等特征参数。碳氢比显示润滑油基本由CH_2组成;红外光谱分析结果表明,润滑油是以长链烷烃为主,其与黏度数据比对分析发现,波数为2 952.67 cm^(-1)时,红外吸收峰高相对质量分数与黏度呈负相关关系;TG-DTG曲线获得9个特征参数中,Ti和Te是润滑油稳定性的重要参数,润滑油在运行中不仅裂解生成小分子低沸点物质,同时也会聚合生成了一些难以氧化分解的高聚物、胶质等,且W_e与W_f呈良好负相关关系,而Wf与β'呈良好正相关关系。To study the decay law of the properties of lubricating oil during unit operation,the method for multiparameter measurement of lubricating oil during unit operation is established by using organic elemental analysis（ EA）,Fourier transform infrared spectroscopic analysis（ FTIR） and thermogravimetric analysis（ TG）. The characteristic parameters of lubricating oil such as carbon-hydrogen ratio,carbon-sulfur ratio,strength ratio of characteristic wavelength of infrared spectra,starting temperature of weightlessness,end temperature of weightlessness and maximum weight loss rate are achieved. The results suggest that lubricating oil is basicly composed of CH_2 and long chain alkanes are the main ingredients. There is a negative correlation between relative mass fraction from infrared absorption peak height and viscosity,as the wave number is 2 952. 67 cm^-1. Tiand Teare the important parameters of stability of lubricating oil in the curve of TG-DTG. Lubricating oil is cracked into small molecules with low boiling point. Meanwhile,high polymers and colloid can also be formed through polymerization,which are difficult to oxidation decomposition. There is a good negative correlation between W_e and W_f,and a good positive correlation between Wfand β＇.

关 键 词：润滑油 元素分析 红外光谱分析 热重分析 

分 类 号：O657.62[理学—分析化学]