手持式直读红外光谱仪快速测定在用润滑油总酸值和总碱值的方法

发布时间：2018-01-14 11:18

本文关键词：手持式直读红外光谱仪快速测定在用润滑油总酸值和总碱值的方法　出处：《光谱学与光谱分析》2017年02期 　论文类型：期刊论文

【摘要】：总酸值(TAN)和总碱值(TBN)能提供关于润滑油氧化程度和碱储备性能方面的信息,其值大小可以判断某些酸性添加剂的加量是否足够,常用于设备润滑油的老化度测量,以避免设备出现异常磨损、腐蚀、沉淀、堵塞过滤器等问题。润滑油的总酸性和总碱性的检测标准都以酸碱滴定为基础,多采用电位滴定法。然而,这种方法需要复杂的操作、昂贵的耗材、大量的油样、熟练的操作人员以及危险试剂的处理问题。由于润滑油的氧化产物和碱性添加剂在红外光谱中都有较强的信息,因此,可以通过红外光谱图研究对润滑油总酸值和总碱值的监测。建立了一种基于酸碱中和反应的定量中红外光谱总酸值和总碱值的手持式直读红外光谱方法,通过油品归类、建立油样库和多元回归三个步骤,可获得准确可靠的量化总酸值和总碱值。此方法获得最新的ASTM D7889标准支持,相比于其他方法,这种方法具有分析速度快、无需任何溶剂、直接得到检测结果并且结果准确,操作相对简单,并一定程度提高了检测速度。可广泛应用于离线实验室和现场在线油液检测。
[Abstract]:Total acid value (TAN) and total base value (TBN) can provide information on the oxidation degree of lubricating oil and alkali reserve performance, and its value can be used to determine whether the addition of some acid additives is adequate. It is often used to measure the aging degree of lubricating oil in equipment to avoid abnormal wear, corrosion, precipitation, clogging filter and so on. The detection standards of total acidity and total alkalinity of lubricating oil are all based on acid-base titration. Potentiometric titration is often used. However, this method requires complex operations, expensive consumables, and large quantities of oil samples. Skilled operators and the handling of dangerous reagents. Because the oxidation products of lubricating oil and alkaline additives have strong information in the infrared spectrum. The total acid value and total base value of lubricating oil can be monitored by infrared spectrogram, and a hand-held direct reading infrared spectrum method based on acid base neutralization reaction was established for quantification of total acid value and total base value of mid-infrared spectrum. Through the classification of oil products, the establishment of oil sample reservoir and the three steps of multivariate regression, the accurate and reliable quantification of total acid value and total base value can be obtained. This method is supported by the latest ASTM D7889 standard. Compared with other methods, this method has the advantages of fast analysis, no solvent, direct detection results and accurate results, and the operation is relatively simple. It can be widely used in offline laboratory and on-line oil detection.
【作者单位】：武汉理工大学能源与动力工程学院可靠性工程研究所;武汉理工大学国家水运安全工程技术研究中心;斯派超科技(北京)有限公司;
【基金】：国家自然科学基金青年基金项目(51309185)资助
【分类号】：O657.33;TE626.3
【正文快照】： 3.斯派超科技(北京)有限公司,北京100176引言总酸值(total acid number,TAN)用来表示中和1g油样中全部酸性组分所需要的碱(KOH)的mg数,用mgKOH·g-1表示。润滑油中的总酸值主要来自生产过程中加入的含有酸根的添加剂,使用过程中烃类氧化而生成的有机酸,含硫燃料在燃烧过程中生

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