Gasolines

Pyrolysis gasoline or Pygas is a naphtha-range product with a high aromatics content. It is a by-product of high temperature naphtha cracking during ethylene and propylene production. PyGas has high potential for use as a gasoline blending mixture and/or as a source of aromatics. Currently, PyGas is generally used as a gasoline blending mixture due to its high octane number.  Pyrolysis gasoline can be blended with other hydrocarbons as a gasoline additive, or distilled (in BTX process) to separate it into its components, including benzene.

Petrol is a transparent, petroleum-derived liquid that is used primarily as a fuel in internal combustion engines. The characteristic of a particular gasoline blend to resist igniting too early (which causes knocking and reduces efficiency in reciprocating engines) is measured by its octane rating. Tetraethyllead and other lead compounds are no longer used in most areas to regulate and increase octane-rating, but many other additives are put into gasoline to improve its chemical stability, control corrosiveness and provide fuel system ‘cleaning,’ and determine performance characteristics under intended use. Sometimes, gasoline also contains ethanol as an alternative fuel, for economic or environmental reasons.

Gasoline A-85

Properties Unit Specification Test Method
Density @20 °C g/cm3 0.725 Max ASTM D 1298
Color Saybolt Light/ Red, Yellow
Total Sulfur ppm 500 Max ASTM D 4294
Lead Content ppb 10 Max A.A
IBP °C 35 Min ASTM D 86
FBP °C 210 Max ASTM D 86
Paraffin Naphthenes %Wt 40 Min G.C
Aromatics %Wt 25 Max G.C
Others %Wt 15 Max G.C
RON 85 Min Infrared

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Gasoline A-92

Properties Unit Specification Test Method
Density@ 20 °C g/ml 0.755 Max ASTM D 1298
Color Saybolt Light Red/Yellow
Total Sulfur ppm 100 Max ASTM D 4294
Lead Content ppb 10 Max A.A
IBP °C 35 Min ASTM D 86
FBP °C 210 Max ASTM D 86
Paraffin Naphthenes %Wt 30 Min G.C
Aromatics %Wt 35 Max G.C
Benzene %Wt 1 Max G.C
Others %Wt 15 Max G.C
RON 92 Min Infrared
MON 84 Min Infrared

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Properties Unit Result Expected Test Method
Density @15°C g/cm3 0.7391 710 min – 780 max ASTM D 1298
RON 95.2 95 min ASTM D 2699
MON 85.2 85 min ASTN D 2700
RVP @ 37.8°C kPa 63.2 49 min – 83 max ASTM D 323
Distillation, 10% vol. recovered °C 50.3 74 max ASTM D 86
Distillation, 50% vol. recovered °C 82.2 127 max ASTM D 86
Distillation, 90% vol. recovered °C 167.1 190 max ASTM D 86
FBP °C 202.6 225 max ASTM D 86
Olefins Content %Vol 9.5 26 max ASTM D 1319
Aromatics Content %Vol 26.7 35 max ASTM D 5580
Benzene Content %Vol 0.64 1 max ASTM D 5580
Oxygenates (MTBE) %Vol 12.9 15 max ASTM D 4815
Total Sulfur Content ppm 11 150 max ASTM D 5453
Lead content g/L <0.0025 Nil ASTN D 3237
Color Undyed Report Visual

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Dry Pyrolysis Gasoline (DPG)

Properties Unit Result Expected Test Method
Density @15.6 °C g/cm3 0.85 0.9 Max ASTM D 4052
RVP psi 6.5 Report ASTM D 323
Total Sulfur ppm 180 Report ASTM D 5453
IBP °C 38 Report ASTM D 86
FBP °C 185 Report ASTM D 86
5% Vol Recovered °C 51 Report ASTM D 86
95% Vol Recovered °C 177 Report ASTM D 86
Paraffin %Wt 2.1 Max 3 G.C
Olefins %Wt 24.5 Max 30 G.C
Naphthenes %Wt 0.4 Max 0.6 G.C
Aromatics %Wt 66.4 60 Min G.C
Others %Wt 6.6 20 Max G.C
Benzene Content %Wt 42.4 40 Min G.C

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Hydrogenated Pyrolysis Gasoline (HPG)

Properties Unit Specification Test Method
Specific gravity @15°C 0.78 – 0.84 ASTM D 1298
Color Saybolt + 5 Min. ASTM D 156
RVP psi 5 – 12 ASTM D 323
IBP °C 34 Min. ASTM D 86
FBP °C 210 Max. ASTM D 86
Aromatics %Wt 50 Min. By GC
Total Sulfur ppm (wt) 300 Max. ASTM D 3120
Copper Corrosion No. 1a ASTM D 130
Lead Content ppb 5 Max. ATOMIC