Olejniczak A.,Nicolaus Copernicus University |
Chostenko A.G.,Nicolaus Copernicus University |
Fall J.,Institute of Petroleum Processing
Fuel | Year: 2010
1H NMR spectroscopy, combined with pattern recognition techniques (PCA and SOM) was used in discriminating base oils and refinery-intermediate products. Both PCA and SOM enabled correct oil discrimination into groups in accordance with API 1509. Moreover, information about the structural compositions of the samples, correlated with their physical and chemical properties, was provided. The PCA score plot enabled component identification and semiquantitative analysis of binary mixtures of base oils, including semisynthetic oils. © 2009 Elsevier Ltd. All rights reserved.
Stepien Z.,Institute of Petroleum Processing |
Urzedowska W.,Institute of Petroleum Processing |
Oleksiak S.,Institute of Petroleum Processing |
Czerwinski J.,University of Applied science Biel Bienne
SAE International Journal of Fuels and Lubricants | Year: 2011
In the Diesel sector the fatty acid methyl esters (FAME's) - in Europe mostly RME *) (rapeseed methyl ester) and in US mostly SME (soja oil methyl ester) - are used as a various share, % volume blends with the Diesel fuel (B5, B7, B10, B20, Bxx). The present joint project focuses on RME being the most important representative of the biofuels of 1st generation in Europe. The influences of RME blend fuels on emissions and on lube oil deterioration are emphasised. Emissions were investigated on a modern engine with exhaust gas aftertreatment devices like SCR and (DPF+ SCR). Beside the legally limited exhaust emission components some non-legislated like NO2, N2O, NH3 and nanoparticles were measured at stationary and dynamic engine operation. The most important findings are: the increased percentage of RME w/o aftertreatment causes an increase of NOx by higher engine load and reduction of CO & HC; at transient operation (ETC) these tendencies are less pronounced and only B100 shows an increase of NOx,. with SCR alone there are no differences of NOx and of NOx reduction rate (KNOX) with increasing RME portion; there is lowering of CO & HC,. with DPF+SCR KNOX-values are slightly higher, than with SCR alone, due to the production of NO2 in the catalytic DPF (upstream of SCR),. there is excellent count filtration efficiency of DPF, up to 99.9%; with SCR alone there is usually a small reduction of nanoparticles concentrations (in the range of 10-20%, similar like an usual oxidation catalyst). The paper describes as well significant problems related to the influences of biofuels on engine lube oils deterioration demonstrated by monitoring the engine lube oil aging during its operation in heavy duty (HD) and modern high speed direct injection (HSDI) light duty (LD) engine through the bench tests. Subject to the long run durability engine tests were both: mineral and synthetic engine lube oils with different improved additives packages and viscosity ranges and with different RME-blending ratios in fuel. The research methodology used: standard analysis as well as in house developed innovative methods, extensive analysis of engine lubricants oxidation stability - thin lubricant film oxidation tests and bulk lubricant oxidation tests. It can be stated that: the presence of bio-components in the fuel has significant impact on multidirectional hastening of engine lube oil destruction processes, kind of base lube oil, lube oil additives components and RME-portion, as well as engine design and its operating conditions are very essential factors influencing the engine lube oil performance, the processes taking place in an engine lubricant, influence adversely the limited possibilities of bio-components evaporation from engine lube oil and contribute to initiation of accelerated, deeper engine lube oil oxidation and degradation. © 2011 SAE International.
Chen Q.,China Aerospace Science and Technology Corporation |
Ma L.,Institute of Petroleum Processing |
Chu Q.,China Aerospace Science and Technology Corporation |
Zhang M.,China Aerospace Science and Technology Corporation |
Wu H.,China Aerospace Science and Technology Corporation
Advanced Materials Research | Year: 2012
Chosed silicone resin with better waterproof and weatherability as raw material, epoxy resin and polyester as modifiers, developed a modified adhesive resin. By researching of the relation between content and property, the matching curing agent with polyfunctional groups was prepared, the modified resin was completely solidified. Properties test and analysis demonstated that the cured modified resin provided super resistance of salt fog and better surface abrasion resistance and perfectible high-temperature resistance. © (2012) Trans Tech Publications, Switzerland.