Synergistic effect on the tribological characteristics for coal-to-liquids soot modified by nitric acid and oleic acid

IF 1.8 4区工程技术 Q3 ENGINEERING, CHEMICAL Lubrication Science Pub Date : 2022-10-03 DOI:10.1002/ls.1626

Jian Wang, Tianxia Liu, Jian Qin

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Abstract

A self-made soot capture device was applied to burn coal-to-liquids and collect its soot (CS), and then modified the CS with nitric acid or nitric acid and oleic acid to obtain nitric acid modified CS (CSN) or nitric acid and oleic acid modified CS (CSNO). The influence of CS, CSN and CSNO on the lubrication performance of 10^# white oil (WO) was investigated on a four-ball tester. The structural difference, surface topography, element composition and tribological mechanism of the three types soot were analysed by Fourier transform infrared spectrometer, X-ray photoelectron spectroscopy, scanning electron microscope, high resolution transmission electron microscope, and so on. From the obtained results, after further modification with oleic acid, the solubility of oil is significantly improved. Compared with 10^# WO, the average friction coefficient and average wear scar diameter of CS, CSN and CSNO are all reduced. Among them, CSNO has the best anti-friction and anti-wear effect. CSNO is expected to be used as carbon lubricating material from coal-to-liquids soot.

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硝酸和油酸改性煤-液烟灰摩擦学特性的协同效应

应用自制的烟尘捕集装置将煤燃烧成液体并收集其烟尘（CS），然后用硝酸或硝酸和油酸对CS进行改性，得到硝酸改性的CS（CSN）或硝酸和烯酸改性的CS（CSNO）。在四球试验机上研究了CS、CSN和CSNO对10#白油润滑性能的影响。通过傅立叶变换红外光谱、X射线光电子能谱、扫描电子显微镜、高分辨率透射电子显微镜等手段，分析了三种炭黑的结构差异、表面形貌、元素组成和摩擦学机理，油的溶解度显著提高。与10#WO相比，CS、CSN和CSNO的平均摩擦系数和平均磨痕直径都有所降低。其中，CSNO具有最好的抗摩擦和耐磨效果。CSNO预计将用作从煤到液体烟灰的碳润滑材料。

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来源期刊

Lubrication Science ENGINEERING, CHEMICAL-ENGINEERING, MECHANICAL

CiteScore

3.60

自引率

10.50%

发文量

审稿时长

6.8 months

期刊介绍： Lubrication Science is devoted to high-quality research which notably advances fundamental and applied aspects of the science and technology related to lubrication. It publishes research articles, short communications and reviews which demonstrate novelty and cutting edge science in the field, aiming to become a key specialised venue for communicating advances in lubrication research and development. Lubrication is a diverse discipline ranging from lubrication concepts in industrial and automotive engineering, solid-state and gas lubrication, micro & nanolubrication phenomena, to lubrication in biological systems. To investigate these areas the scope of the journal encourages fundamental and application-based studies on: Synthesis, chemistry and the broader development of high-performing and environmentally adapted lubricants and additives. State of the art analytical tools and characterisation of lubricants, lubricated surfaces and interfaces. Solid lubricants, self-lubricating coatings and composites, lubricating nanoparticles. Gas lubrication. Extreme-conditions lubrication. Green-lubrication technology and lubricants. Tribochemistry and tribocorrosion of environment- and lubricant-interface interactions. Modelling of lubrication mechanisms and interface phenomena on different scales: from atomic and molecular to mezzo and structural. Modelling hydrodynamic and thin film lubrication. All lubrication related aspects of nanotribology. Surface-lubricant interface interactions and phenomena: wetting, adhesion and adsorption. Bio-lubrication, bio-lubricants and lubricated biological systems. Other novel and cutting-edge aspects of lubrication in all lubrication regimes.