Research Article
Open Access
Evaluation of the Economic and environmental benefits of mineral oil used in Bi-fuel engines (Gasoline-compressed natural gas)
Mhd Maher Kallas*1, Thaer Sallam1, Younes Saoud2
1Automobiles & Heavy Machines engineering Department-Faculty of Mechanical & Electrical Engineering - Damascus University- Syria
2Higher institute for science & technology- Damascus- Syria
2Higher institute for science & technology- Damascus- Syria
Mhd Maher Kallas et al /Int.J. TechnoChem Res. 2017,3(2),pp 274-280.
Abstract
Engine oil is very important for engine life and operation. therefore, determining investment
period (IP) of oil is useful in minimizing production and harmful wastes cost.
Natural gas (NG) maximizes oil drain intervals (ODI) and reduces toxic gas components caused by
internal combustion engine (ICE). In addition, it is available in Syria and could be used as vehicle's fuel.
This research includes laboratory tests and field trails to determine ODI for Syrian mineral oil API SAE
40/ CF used in gasoline engine when operated on compressed natural gas (CNG).
Several used oil samples have been taken from three Bi-fuel vehicles operating at a petroleum field. Each
sample was analyzed to monitor change in the physical and chemical properties of the oils, additive
depletion and accumulation of contaminants. Used oil analysis (UOA): Kinematic viscosity, total acid
number (TAN), total base number (TBN), flash point, antioxidant and anti-wear additives were
performed in tribology laboratory.
UOA results were used to determine IP for gasoline engine operated on CNG. ODI of (18000 km) were
obtained in comparison with original intervals (7500 km) recommended when oil used in gasoline
engines. ODI is extended more than two times. These results will affect economy and environment
positively. It reduces the cost of engine oil drain, quantities of new oils and used oils wastes by nearly
two times.
period (IP) of oil is useful in minimizing production and harmful wastes cost.
Natural gas (NG) maximizes oil drain intervals (ODI) and reduces toxic gas components caused by
internal combustion engine (ICE). In addition, it is available in Syria and could be used as vehicle's fuel.
This research includes laboratory tests and field trails to determine ODI for Syrian mineral oil API SAE
40/ CF used in gasoline engine when operated on compressed natural gas (CNG).
Several used oil samples have been taken from three Bi-fuel vehicles operating at a petroleum field. Each
sample was analyzed to monitor change in the physical and chemical properties of the oils, additive
depletion and accumulation of contaminants. Used oil analysis (UOA): Kinematic viscosity, total acid
number (TAN), total base number (TBN), flash point, antioxidant and anti-wear additives were
performed in tribology laboratory.
UOA results were used to determine IP for gasoline engine operated on CNG. ODI of (18000 km) were
obtained in comparison with original intervals (7500 km) recommended when oil used in gasoline
engines. ODI is extended more than two times. These results will affect economy and environment
positively. It reduces the cost of engine oil drain, quantities of new oils and used oils wastes by nearly
two times.
Keywords
Compressed natural gas (CNG), mineral engine oil, used oil analysis (UOA), oil drain intervals (ODI), internal combustion engine (ICE).
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