Unleaded mogases represent the hydrocarbon blend usually boiling within 20 to 215°C, obtained from crude oil through distillation and other refining processes. They may contain additives that enhance their application characteristics, e.g. oxygenous components, detergents, antiknock, antioxidative and other additives.
Basic Quality Parameters
CSN EN 228
|Quality Requirements||BA 95||BA 98
|Octane number RON, min.||95||98|
|Octane number MON, min.||85||88|
|Appearance||transparent and clear||transparent and clear|
|Density at 15°C - kg.m-3||725 - 775||725 - 775|
|Lead content - mg/l, max.||5||5|
|- evaporated at 70°C - % (V/V), lsummer||20 - 48||20 - 48|
|- evaporated at 70 °C - % (V/V), winter||22 - 50||22 - 50|
|- evaporated at 100 °C - % (V/V)||46 - 71||46 - 71|
|- evaporated at 150°C - % (V/V), min.||75||75|
|end of distillation - °C, max.||210||210|
|Reid vapour pressure - kPa, summer||45 - 60||45 - 60|
|Reid vapour pressure - kPa, winter||60 - 90||60 - 90|
|Volatility index (april and October) max.||1150||;1150|
|Oxidation stability - minutes, min.||360||360|
|Mechanical impurities and water||none||none|
|Sulphur content - mg.kg-1||10||10|
|Resinous material - mg.100cm-3, max.||5||5|
|Benzene content - % (V/V), max.||1||1|
|Aromates content - % (V/V), max.||35||35|
|Olefins content- % (V/V), max.||18||18|
|Oxygen content - % (M/M), min.||2,7||2,7|
Note: Summer 1st May.-30th September., Winter 1st November.-31st March, transitory period April and October.
Unleaded mogases are mainly applied in spark-ignition engines of road motor vehicles. They are not allowed to be used in vehicles operating within confined workplaces. Unleaded mogases are designed especially for modern-type spark-ignition engines equipped with catalyst and lambda probe controlled.
Packaging, Storage, Transportation
Unleaded mogases are supplied in rail and road tankers or through the product pipeline. Mogas storage, transporting and handling must comply with the respective legal regulations (Act No.. 238/91 Code, CR Ministry of Health Guideline, Railway Transportation Order, CSN 65 0201, CSN 65 6060 and others).
Basic Safety Data
Unleaded mogases are flammable liquids class I of fire hazard, with flash point below 0°C.