Project Description
Special Catalyst For MGD Process fcc catalyst
Applicable Scope:
Specially formulated catalyst for MGD process.
Characteristics
RGD-1 has good bottom cracking ability and can limit further cracking of intermediate fractions, enhance secondary cracking of gasoline fraction, which increases yield of LCO and LPG. The hydrogen transfer reaction is enhanced appropriately with adjustment on density and intensity of zeolite active sites, reducing the olefin content in gasoline
Design Philosophy
In the preparation of RGD-1 catalyst, carrier has appropriate pore distribution, furthermore, macropore lager than 100Å and micropore smaller than 5Å increase with kaolinite improved. The macropore is low-acid which promotes the cracking of macromolecule hydrocarbon, inhibits the secondary cracking of intermediate fractions and reduce the coke. The micropore is high-acid which makes gasoline further crack into LPG. Introduction of metal component in active sites adjusts acid strength appropriately and increases the gasoline to LPG cracking level. Meanwhile, hydrogen transfer ability is improved in favor of decreasing olefin content in gasoline. Modified shape-selective zeolite is applied to improve the LPG yield and increase RON & MON.
Property
The main specifications of RGD-1 catalyst were shown in Table 1.
Table 1 Main Specifications of RGD-1
Item | Unit | Index |
Al2O3 | % (m/m) | ≥45.0 |
Fe2O3 | % (m/m) | ≤0.60 |
Na2O | % (m/m) | ≤0.20 |
LOI | % (m/m) | 11.0-13.0 |
Pore volume | ml/g | ≥0.32 |
Specific surface area | m2/g | ≥220 |
Apparent bulk density | g/ml | 0.65~0.80 |
MAT (800℃/4h) | % (m/m) | ≥74 |
Attrition Index | % (m/m) | ≤2.5 |
Particle Distribution | ||
0~40μm | % (v/v) | ≤18.0 |
0~149μm | % (v/v) | ≥89.0 |
APS | μm | 65.0-80.0 |
Commercial Reference
RGD-1 catalyst industrial application is conducted in FREP. The industrial application indicates that RGD-1 catalyst with MGD process shows good bottoms conversion ability, high-value products selectivity and remarkable effect of reducing olefin in gasoline as the catalytic feedstock is in a trend of turning worse.
Table 2 Feedstock Properties
Calibration No. | Calibration 1 | Calibration 2 | |
Density (20℃), g/cm3 | 0.9163 | 0.9167 | |
kinematic viscosity (100℃), mm2/s | 15.73 | 21.26 | |
Freezing point, ℃ | 35 | 38 | |
CCR, % | 3.10 | 3.70 | |
Element, m% | C | 86.54 | 86.54 |
H | 12.11 | 12.35 | |
N | 0.2l | 0.22 | |
S | 0.76 | 0.75 | |
Group-component m% |
Saturates | 60.2 | 56.6 |
Aromatics | 29.2 | 30.1 | |
Resins | 10.1 | 12.7 | |
Asphaltenes | 0.5 | 0.6 | |
Metal, ppm | Fe | 3.3 | 9.0 |
V | 9.3 | 14.3 | |
Na | 1.4 | 1.3 | |
Cu | 0.0 | <0.1 | |
Ni | 5.6 | 9.6 | |
Distillation, ℃ | 5% | 333 | 316 |
10% | 375 | 374 | |
30% | 410 | 418 | |
50% | 444 | 457 | |
70% | 488 | 508 | |
(350℃) distillate, v% | 6.5 | 7.5 | |
(500℃) distillate, v% | 74.0 | 68.5 | |
(530℃) distillate, v% | 81.0 | 75.5 |
Table 3 Main Operating Conditions
Calibration No. | Calibration 1 | Calibration 2 |
Calibration scheme | Blank | RGD-1 |
Name of main catalyst | OB series + CA-1 | RGD-1 |
Throughput, t/h | 192.7 | 173.0 |
Coker gasoline feed rate, m% | 0 | 0 |
Catalytic gasoline feed rate, m% | 0 | 0 |
Reaction pressure, MPa | 0.234 | 0.228 |
Riser outlet temperature, ℃ | 516 | 508 |
C/O | 6.9 | 6.4 |
Recycle ratio | 0.00 | 0.07 |
Average reaction time, s | 4.1 | 3.8 |
Regenerator #1 pressure, MPa | 0.250 | 0.251 |
Regenerator #1 Dense bed temperature, ℃ | 669 | 690 |
Regenerator #1 air flow, Nm3/h | 87000 | 83700 |
Regenerator #2 pressure, MPa | 0.242 | 0.237 |
Regenerator #2 Dense bed temperature, ℃ | 702 | 717 |
Regenerator #2 air flow, Nm3/h | 53940 | 49800 |
Table 4 Products Distribution
Calibration No. | Calibration 1 | Calibration 2 | D-value |
Product distribution, m% | |||
Dry gas | 4.67 | 4.21 | -0.46 |
LPG | 16.70 | 18.10 | + 1.40 |
Gasoline | 38.00 | 38.15 | + 0.15 |
LCO | 25.78 | 25.60 | -0.18 |
Slurry | 6.96 | 6.09 | -0.87 |
Coke | 7.37 | 7.30 | -0.07 |
Loss | 0.52 | 0.55 | + 0.03 |
Total | 100.00 | 100.00 | / |
Conversion, m% | 67.26 | 68.31 | + 1.05 |
Gasoline + LCO, m% | 63.78 | 63.75 | -0.03 |
LPG + Gasoline + LCO, m% | 80.48 | 81.85 | + 1.37 |
LPG + LCO, m% | 42.48 | 43.70 | + 1.22 |
Dry gas + Coke, m% | 12.04 | 11.51 | -0.53 |
Propylene, m% | 5.44 | 5.92 | + 0.48 |
Commercial Application
RGD-1 Catalyst was applied in FREP, SINOPEC Guangzhou Petrochemical, SINOPEC Jingmen Petrochemical and CNPC north China Petrochemical, etc.
Products/Grades
RGD-1