VRCC Series Catalyst FCC catalyst
VRCC-1 is a bottom cracking catalyst, especially suitable for processing heavy oil with high CCR content.
VRCC-1 is developed for #2 FCCU of SINOPEC Yansan Petrochemical in Beijing，which has a better bottom cracking ability, high liquid yield, metal contaminant resistant ability and improved coke selectivity. VRCC-1 catalyst is also a good choice for clean gasoline production.
At present, VRCC-1 catalyst is characterized as follows: firstly, SOY is used as Y zeolite component with higher gasoline selectivity and lower gasoline olefinicity by enhancing bi-molecular reactions; secondly, the matrix used is mesopore modified to improve bottom cracking ability, coke selectivity and metal contaminant resistant ability; thirdly, the catalyst micro chemical environment was well designed by optimizing the active component matching and distribution; and finally, the selectivity of bimolecular reactions and monomolecular reactions are well controlled and hence the product distribution and product quality control can be realized.
The main specifications of VRCC-1 catalyst were shown in Table 1.
Table 1 Main Specification of VRCC-1 Catalyst
|Chemical components, m%|
|Attrition Index, %||≤3.0|
|Bulk Density, g/ cm3||0.68-0.78|
|Surface Area, m2/g||≥230|
|Pore Volume, ml/g||≥0.34|
The industrial application was conducted #2 FCCU of SINOPEC Yanshan Petrochemical. The catalyst replacement started from December 2007 and the performance evaluation was conducted in November of 2008. Fresh catalyst make up was conducted on a day-to-day base. VRCC-1 content in inventory reached a level of 100% in November of 2008. The results were listed in Table2.
The VRCC-1 catalyst has an excellent performance covering good adaptability to different feeds, excellent bottom cracking ability, good coke selectivity and metal contaminant resistant ability. As a result the unit throughput is increased by using VRCC-1 catalyst. According to the results of commercial application, the yield of gasoline plus LCO is higher than 66 wt% and the total liquid yield is higher than 80wt%. Meanwhile the gasoline olefin content is reduced. The application of the catalyst is beneficial to refineries. The VRCC-1 catalyst exhibits high activity-stability, low catalyst consumption, no negative influence on fluidization status in long term operation.
Table 2 Feedstock Properties
|Blending ratio, %||61.35||63.37|
|Density (20℃), g/cm3||0.9242||0.9209|
|Viscosity (80℃), mm2/s||128.7||63.78|
Table 3 Industrial Application Results of VRCC-1 Catalyst
|Reaction temp., ℃||517||517.2|
|Regeneration temp., ℃||680||702|
|Heavy metal content on E-cat, μg/g|
|Ni + 1/4V||7560||8350|
|Products distribution, wt%|
|Light cycle oil||20.79||20.57|
|Gasoline + LCO, wt%||65.00||66.94|
|Total liquid yield, wt%||79.52||82.08|
|Gasoline composition, v% ( Fluorescent method )|
|Inductive period, min||369||358|
Since December of 2007, VRCC-1 has been used in #2 FCCU of SINOPEC Yanshan Petrochemical.