Project Description

Special Catalyst For ARGG Process fcc catalyst

Applicable Scope：

Specially formulated catalyst for ARGG process.

Characteristics

RAG series catalyst has good structural stability and particle size distribution, making the heavy oil molecules in different size especially the macropore contact and react with the active sites selectively and completely. Meanwhile, heavy metal molecules can be accommodated in macropore. RAG series catalyst has high activity, high selectivity, excellent bottom conversion and good metal resistance.

Design Philosophy

ARGG takes heavy oil such as atmospheric residue as feedstock to maximize the yield of gas and gasoline. In addition, the quality of products is no worse than that of RFCC products. Considering the characteristics of atmospheric residue, the property of carrier is improved in the production of RAG series catalyst in order to make the pore distribution more reasonable. Meanwhile, optimizing combination of particle size distribution and carrier property gives RAG series catalyst stronger bottom conversion ability, better gasoline selectivity and metal resistance.

Property

Table 1 Main Specifications of RAG-6

Item Unit Index
Al2O3 % (m/m) ≥45.0
Fe2O3 % (m/m) ≤0.60
Na2O % (m/m) ≤0.25
SO4 % (m/m) ≤2
LOI % (m/m) ≤13.0
Pore volume ml/g ≥0.30
Specific surface area m2/g ≥220
Apparent bulk density g/ml 0.65～0.80
MAT(800℃/4h) % (m/m) ≥58
Attrition Index % (m/m) ≤3.0
Particle Distribution
0～40μm % (v/v) ≤18.0
0～149μm % (v/v) ≥89.0
APS μm 65.0-80.0

Commercial Reference

The first industrial application was conducted on SINOPEC Baling Petrochemical, the test results show that RAG-6 catalyst has high activity, stability, selectivity, bottoms conversion capability and metal resistance capability causing higher yield of liquefied gas and gaseous olefins. The following are calibration data in Baling Petrochemical.

Table 2  Feedstock Properties

Item Calibration 2 Calibration 3
Density (20℃), g/cm3 0.8891 0.8897
kinematic viscosity (100℃), mm2/s 21.00 21.37
Freezing point, ℃ 36 41
CCR, % 4.05 3.89
Element, %
H, % 12.94 12.96
S, % 0.104 0.097
N, % 0.38 0.39
C, % 86.68 86.65
Group-component, %
Saturates 54.0 54.5
Aromatics 28.4 26.8
Resins 17.1 18.4
Asphaltenes 0.5 0.3
Metal Content, µg/g
Ni 4.1 4.4
V <0.1 0.1
Fe 2.2 2.4
Ca 0.5 0.8
Na <0.1 <0.1
Distillations, ℃
First distilled point 288 293
10% 382 381
30% 453 450
50% 541 542
350℃ distillate, v% 4.2 4.5
500℃ distillate, v% 41.5 42

Table 3  Main Operating Conditions

Item Calibration 2 Calibration 3
Feed Rate, t/h 93.1 95.8
Riser outlet temperature, ℃ 537 505
Disengager top pressure, KPa 110 116
Regenerator top pressure, KPa 150 150
Regenerator Dense bed temperature, ℃ 698 709
C/O 8.6 6.9
Recycle ratio 0.13 0.21
Reaction time, s 3.6 3.8
air flow, Nm3/h 114666 115867

Table 4  Products Distribution

Item Calibration 2 Calibration 3
Dry gas 4.10 2.59
LPG 28.15 19.69
Gasoline 42.87 40.63
LCO 14.57 25.83
Coke 9.34 9.63
Loss 0.97 1.63
Total 100.00 100.00
Conversion, % 85.43 74.17
Light ends yield, % 57.44 66.46
Total Liquid, m% 85.59 86.15

Commercial Application

RAG catalyst has been applied in SINOPEC refineries such as Yangzhou Petrochemical, Baling Petrochemical and Gaoqiao Petrochemical, CNPC Daqing Petrochemical, BlueStar Petrochemical and also in some local refineries.

Products/Grades

RAG-1, RAG-6, RAG-7, RAG-9, RAG-10 and RAG-11