MAG-O, an FCC additive catalyst is a flexible tool for changing the volume and quality of gasoline pool.
SZIKKTI Ltd produces and distributes the patented additive catalyst MAG-O to further crack and isomerize the lower octane components produced by the primary FCC catalyst. MAG-O simultaneously increases the octane number in the FCC gasoline and the volume of C3-4 olefins. The special advantage of MAG-O is the high yield of the valuable isobutylene.
Originally, MAG-O containing 15% ZSM-5 zeolite in an active matrix, was developed for the requirement of the Danube Refinery of MOL Hungarian Oil and Gas Co. The catalyst has contributed successfully to a better profitability of the refinery unit since 1996.
Properties| average particle diameter | 60 micro meter |
| surface area | 70 m2/g |
| apparent bulk density | 0,8 g/cc |
| pore volume | 25-30 microlitre/g |
similar grain size that of FCC primary catalyst
hydrothermal stability
attrition resistance
high selectivity to propylene and butylene
low make-up rate
| FCC gasoline % | RON % | LPG % | C3= % | C4= % | i-C4= % | |
| 100 % FCC E-cat | 38,4 | 88,7 | 15,2 | 4,7 | 5,2 | 1,5 |
| 95% E-cat+ 5% MAG-O (steamed) | 34,0 | 90,8 | 22,2 | 8,2 | 7,4 | 2,6 |
flexible operation
fast impregnation and slow abatement
yield structure can be changed easily
increased octane pool
increased volume of feedstock for high octane MTBE and HF
alkalyte
feedstock
FCC primary catalyst (REY>USY)
the technology (FCC/MTBE/HFA)
Dosage is between 2 and 10% depending on the requirement. We offer conducting MAT test with our partner's feedstock and FCC catalyst to find the optimum quantity of MAG-O for the given unit.
Reference:The high demand for unleaded and low benzene and aromatic containing gasoline without effecting the octane number forced MOL to increase the production of high quality blending components. The application of MAG-O with basic FCC unit was an economical way to solve octane problems.
A process flow sheet for the manufacture of gasoline, MTBE and alkylate is shown in the Figure. MAG-O was introduced as a separate additive to the FCC reactor in addition to the equilibrium catalyst. The table below shows the changes in the yield structure relevant to a typical feedstock. Feedstock: hydrotreated VGO, density: (15°C) 888 kg/m3, sulphur: 0,07 wt%, viscosity: (50°C), 30,7 mm2/sec, refractive index: 1,481.
| Additive, wt% | 0 | 4 | Difference |
| Riser temperature, °C | 531 | 528 | -3 |
| Gasoline (210°C), wt% | 50,24 | 48,7 | 1,54 |
| LCO+MCB, wt% | 21,63 | 24,46 | -0,17 |
| LPG, wt% | 20,3 | 21,9 | 1,6 |
| C3=, wt% | 5,9 | 6,7 | 0,8 |
| C4=, wt% | 6,4 | 7 | 0,6 |
| RON | 94,3 | 94,9 | 0,6 |
| MON | 82,2 | 82,5 | 0,3 |
By using MAG-O even at a 3°C lower riser temperature there is a favorable change in the yield structure. MAG-O can be applied advantageously in achieving high octane number with high propylene and butylene yields, ensuring higher MTBE, alkylate and pure propylene yields. The capacity of MTBE unit can be fully utilized and due to the higher propylene yield, production of additional alkykate is possible. With MAG-O at lower temperatures, the octane level of FCC gasoline can be maintained at RON 94,4 and MON 82,5.
MAG-O additive is an effective tool for a refinery to meet the ever changing requirements. The use of MAG-O in the Danube Refinery led to a significant octane pool increase. This resulted from the higher selectivity of propylene and butylenes. The increased yields of high octane MTBE and HF-alkylate surpassed the decrease of yield in FCC gasoline. Due to the use of MAG-O the total volume of gasoline blending components and octane pool have increased.