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Contenuto archiviato il 2022-12-27

HIGH OCTANE NUMBER LEAD FREE GASOLINE PRODUCTION USING MOLECULAR SIEVES

Obiettivo

To increase the octane number of the light straight run gasoline in order to have a more valuable component in the gasoline pool.
The advantages of this project are:
- increased production of low lead gasoline
- possibility to produce lead free gasoline
- energy saving due to installation of molecular sieves instead of distillation columns
- pollution decrease.
The Isomerisation process does not result in a direct energy saving as such but in an increase in the production of high octane number gasoline.
The energy saving is an indirect result achieved by the employment of T. I. P. (Total Isomeration Process) instead of the distillation columns method.
The energy saving results are as follows :
T. I. P DISTILLATION ENERGY SAVING
POWER 740 KWH/hr 1010 KWH/hr
600 TOE/an
STEAM 2. 5 MT/hr 17. 4 MT/hr
7. 528 TOE/an
FUEL 5. 1 (10)6 Kcal/hr 5. 3 (10)6 Kcal/hr 106 TOE/an
------------
8. 288 TOE/an
The Isomerisation unit, using the Total Isomerisation Process (T. I. P.) developed by Union Carbide, allows the upgrading of the light straight run raphtha blended as such into the gasoline pool - from a 60 RON level up to about 88 RON with a 95 % liquid yield. The total isomerisation process is a constant pressure vapour phase process operating at moderate pressure (20 kg/cm2, temperature 250 deg. ).
Fresh feed is mixed with a hot recycle stream of Hydrogen and normal paraffins prior to entering the isomerisation reactor, where the linear components are partially converted into branched components using a molecular sieve catalyst. The reactor effluent is cooled and flashed in a separator drum. The liquid product containing sone unconverted low octane paraffin is vapourised and passed throught a bed of molecular sieves, where the straight chain normal paraffins are absorbed in order to be recycled back to the isomerisation reactor. The high octane branched chain isomer and cyclichydrocarbon exit from the absorbent bed face of normal paraffins. The isomerate is stabilised in a column where the hydrogen and propane and butane are separated from high octane gasoline. The hydrogen purgegas is circulated by means of a compressor through a heater and is used to strip the normal paraffins previously absorbed on the molecular sieves BEO. The hydrogen desorbed normals are then mixed with new feed in the upper part of the isomerisation reactor.

Argomento(i)

Invito a presentare proposte

Data not available

Meccanismo di finanziamento

DEM - Demonstration contracts

Coordinatore

MOTOR OIL (HELLAS) CORINTH REFINERY SA
Contributo UE
Nessun dato
Indirizzo
IRODOU ATIKOU 12A
15124 Marousi
Grecia

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Costo totale
Nessun dato