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