Black Sludge in TPEO and Evaluating Sulfonate & Salicylate Detergents on Asphlatene Dispersancy
Nowadays, asphaltene contamination called ’Black Sludge’ in marine trunk piston engine oils (TPEOs) continues to be a common issue. ’Black Sludge’ can occur through leaky fuel pumps or poor combustion which is usually detrimental to lube oil properties such as increasing viscosity and volatility, weakening the function of the additives. Meanwhile ’Black Sludge’ can deposit on a piston surface and act as an insulating layer to influence engine efficacy and heat transfer, sometimes may even cause crankcase explosion, therefore selecting proper TPEOs plays a significant role in controlling ’Black Sludge’. A key design feature for preventing asphaltene precipitation is choosing the proper additives, especially detergent additives in reducing ’Black Sludge’. In this paper, asphaltene dispersancy effectiveness was investigated through making the simulated solutions according to the hydrocarbon types of typical Group I and Group II base oils. Utilizing different facilities including Malvern Mastersizer 2000 particle size analyzer, LaserNet Fines ? -C particle counter, Focused Beam Reflectance Measurement to interpret the effectiveness of calcium alkyl sulfonate and calcium alkyl salicylate with combining traditional spot dispersancy test. All tests have a good correlation with real asphaltene dispersancy effectiveness. Test results show that salicylate package has a more outstanding performance than sulfonate one.
Jicheng Piao Jie Zhang Jun Yu Tao Feng
PetroChina Dalian Lubricating Oil R and D Institute,China
国际会议
上海
英文
1-8
2013-05-13（万方平台首次上网日期，不代表论文的发表时间）