Results 41 to 50 of about 1,257 (175)

The Effect of Temperature and Asphaltene Content on the Lubricating Properties of Fuel Oils

Lubricants, 2023
During coal-based power generation, fuel oil is used to assist with ignition of pulverised coal. Fuel oil passes through several pieces of equipment on its way to the burner section of the boiler.
Trinity Thobejane, Philip L. de Vaal
doaj   +1 more source

Effect of Acute Mental Stress on Heart Rate and QT Variability in Postmyocardial Infarction Patients

International Scholarly Research Notices, Volume 2012, Issue 1, 2012., 2012
Emotionally charged events are associated with an increased risk of sudden cardiac death (SCD). In this study we assessed RR and QT variability index (QTVI) at baseline during anger recall test (AR). We calculated QTVI from a 5‐min ECG recording and from a 10‐beats segment around the presumed maximum sympathetic activation in thirty post‐myocardial ...
Damiano Magrì, Gianfranco Piccirillo, Raffaele Quaglione, Annalaura Dell’Armi, Marilena Mitra, Stefania Velitti, Daniele Di Barba, Andrea Lizio, Damiana Maisto, Francesco Barillà, K. Aalto-Setala, K. Nakamura   +11 more
wiley   +1 more source

The Performance of Carbon-Based Nanomaterials in Different Base Oils and an Oil Blend

Lubricants
Different carbon-based nanomaterials (fullerenes, graphene, SWCNTs, and SWCNT-COOH) were tested as additives in a base mineral oil, SN150; rapeseed oil (RSO); and a 50/50 by volume blend of the two using an HFRR (high-frequency reciprocating rig) tester ...
Jack Nasr, Diana-Luciana Cursaru
doaj   +1 more source

Tribological Effects of Mineral‐Oil Lubricant Contamination with Biofuels: A Pin‐on‐Disk Tribometry and Wear Study

Advances in Tribology, Volume 2011, Issue 1, 2011., 2011
Use of biodiesel produces engine oil dilution because of unburned biodiesel impinging on cold walls of the combustion chamber, being scrapped to the oil pan, and leading to changes of oil friction, wear and lubricity properties. In this paper, mixtures of SAE 15W‐40 oil, which were contaminated by known percentages of the biodiesels from canola oil ...
S. M. Shanta, G. J. Molina, V. Soloiu, Dae Eun Kim   +3 more
wiley   +1 more source

FAP- Anion Ionic Liquids Used in the Lubrication of a Steel–Steel Contact [PDF]

, 2013
This study compares the tribological behavior of two ionic liquids ([BMP][FAP] and [(NEMM)MOE][FAP]) used as oil additive for the lubrication of a steel–steel contact. Friction and wear experiments were performed using a HFRR test machine.
A Hernández Battez, A. Fernández-González, A. García, A. Hernández Battez, AE Jiménez, D Blanco, D Blanco, DA Shirley, F Mangolini, I Minami, J Qu, J Qu, J. L. Viesca, K Mistry, M. Hadfield, MD Bermúdez, R González, R González, R. González, R. Monge   +19 more
core   +1 more source

Characterization of Tribofilm from Sulfurized Mohwa Oil

International Scholarly Research Notices, Volume 2011, Issue 1, 2011., 2011
The reaction products of sulfurized Mohwa oil with iron powder in hydrocarbon medium at 150°C for 8 h were studied to investigate the type of lubricant films formed during their application as antiwear and extreme pressure additives. The main reaction product was isolated on the basis of its solubility in mixed solvent.
Arun Kumar Singh, M. Ahmadian, C. J. Ho
wiley   +1 more source

Squeezing molecular thin alkane lubrication films between curved solid surfaces with long-range elasticity: Layering transitions and wear [PDF]

, 2003
The properties of alkane lubricants confined between two approaching solids are investigated by a model that accounts for the curvature and the elastic properties of the solid surfaces. We consider linear alkane molecules of different chain lengths, C3H8,
Persson, B. N. J., Samoilov, V. N., Sivebæk, Ion Marius   +2 more
core   +2 more sources

Extending the environmental benefits of ethanol–diesel blends through DGE incorporation [PDF]

, 2015
The research focuses on the potential use of DGE (diethylene glycol diethyl ether), as a high-cetane number oxygenated additive to diesel-like fuels. Apart from evaluating its individual effects an investigation of how DGE can facilitate the use of bio ...
Herreros, Martin, Schroer, K., Sukjit, E., Tsolakis, A.   +3 more
core   +2 more sources

Modified Oxymethylene Ethers Based on Technical Alcohol Mixtures and their Fuel Properties

Chemie Ingenieur Technik, Volume 97, Issue 5, Page 495-507, May 2025.
A modified oxymethylene ether (OME) synthesis based on C5 and C9 technical alcohol mixtures was developed. The produced compounds can be employed as neat fuel or as blending component for fossil or paraffinic diesel fuels. The modification of OME offers the possibility to adjust desired properties, enabling the evaluation of new application fields ...
Victor Zaghini Francesconi, Marius Drexler, Thomas A. Zevaco, Ulrich Arnold, Jörg Sauer   +4 more
wiley   +1 more source

Microstructure, Hardness, and Linear Reciprocating Sliding Wear Response of Directionally Solidified Al–(2.5, 3.5, 4.5)Cu–(0.25, 0.50)Cr Alloys

Metals, 2023
Aluminum alloys containing transition metal alloying elements have attracted interest from researchers. The effect of Cr additions of 0.25 and 0.50% on the thermal profile, microstructure, hardness, and linear reciprocating sliding wear response of as ...
Rafael V. Lantmann, André M. S. Mariante, Tiago V. Pinheiro, Eleani M. da Costa, Carlos A. dos Santos   +4 more
doaj   +1 more source