Project Description
VRCC Series Catalyst FCC catalyst
Applicable Scope
VRCC-1 is a bottom cracking catalyst, especially suitable for processing heavy oil with high CCR content.
Characteristics
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.
Design Philosophy
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.
Property
The main specifications of VRCC-1 catalyst were shown in Table 1.
Table 1 Main Specification of VRCC-1 Catalyst
VRCC-1 | |
Chemical components, m% | |
Al2O3 | ≥45.0 |
Na2O | ≤0.30 |
SO4= | ≤2.0 |
Fe2O3 | ≤0.45 |
Physical property | |
LOI, m% | ≤13.0 |
Attrition Index, % | ≤3.0 |
Bulk Density, g/ cm3 | 0.68-0.78 |
Surface Area, m2/g | ≥230 |
Pore Volume, ml/g | ≥0.34 |
Particle Distribution | |
0~40μm, m% | ≤20 |
0~149μm, m% | ≥90 |
MAT | |
800oC/4h, m% | ≥75 |
Commercial Reference
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
Items | Reference | VRCC-1 |
Throughput, t/d | 2355 | 2381 |
Blending ratio, % | 61.35 | 63.37 |
Density (20℃), g/cm3 | 0.9242 | 0.9209 |
Viscosity (80℃), mm2/s | 128.7 | 63.78 |
CCR, % | 7.11 | 6.43 |
Element, % | ||
C | / | 86.94 |
H | / | 12.40 |
S | 0.35 | 0.35 |
N | 0.29 | 0.22 |
SARA, % | ||
saturates | 52.1 | 45.8 |
Aromatics | 44.0 | 30.8 |
Resin | 3.9 | 23.3 |
Asphalt | 0.0 | 0.1 |
Metal, μg/g | ||
Fe | 6.73 | 7.78 |
Ni | 8.71 | 6.41 |
Cu | <0.1 | <0.1 |
V | 1.18 | 0.63 |
Na | 0.71 | 1.71 |
Ca | 18.01 | 16.64 |
Table 3 Industrial Application Results of VRCC-1 Catalyst
Catalyst | Reference | VRCC-1 |
Operation conditions | ||
Reaction temp., ℃ | 517 | 517.2 |
Regeneration temp., ℃ | 680 | 702 |
Heavy metal content on E-cat, μg/g | ||
Fe | 5800 | 8330 |
Ni | 7000 | 7800 |
V | 2400 | 2200 |
Ca | 7400 | 6800 |
Sb | 1800 | 2200 |
Ni + 1/4V | 7560 | 8350 |
Products distribution, wt% | ||
Dry gas | 3.16 | 2.78 |
Liquid yield | 14.52 | 15.14 |
Gasoline | 44.21 | 46.37 |
Light cycle oil | 20.79 | 20.57 |
Slurry | 7.23 | 6.23 |
Coke | 8.96 | 7.83 |
Conversion, wt% | 71.98 | 73.20 |
Gasoline + LCO, wt% | 65.00 | 66.94 |
Total liquid yield, wt% | 79.52 | 82.08 |
Gasoline properties | ||
Gasoline composition, v% ( Fluorescent method ) | ||
Saturates | 36.3 | 38.6 |
Olefin | 44.9 | 37.9 |
Aromatics | 18.8 | 23.5 |
RON | 91.7 | 91.9 |
Inductive period, min | 369 | 358 |
Commercial Application
Since December of 2007, VRCC-1 has been used in #2 FCCU of SINOPEC Yanshan Petrochemical.
Products/Grades
VRCC-1
Email: y@yzeolite.com