Project Description

COKC Series Catalyst FCC catalyst

Applicable Scope

COKC Catalyst is a bottom cracking catalyst.


COKC-1 Catalyst is developed for 1# FCCU of SINOPEC Qilu Petrochemical, which has higher hydrothermal stability and cracking activity, better gasoline selectivity and coke selectivity, and excellent heavy metal-resisting property.

Design Philosophy

COKC series catalyst adopts new generation structure optimized zeolite SOY-8 molecular sieve as main active component, which is prepared by further modifying ultra-stable zeolite with the technology of cleaning of pores. SOY-8 molecular sieve has lower Na content, less non-framework aluminum, unblocked channel, higher thermal and hydrothermal stability. Meanwhile, it has excellent coke selectivity, high accessibility of active sites and strong cracking ability to heavy oil. In addition, COKC series catalyst adopts large pore alumina as matrix to enhance bottom cracking ability and improve selectivity.


The main specifications of COKC-1 catalyst are shown in Table 1.

Table 1 Main Specifications of COKC-1 Catalyst

Chemical components, m%
Al2O3 ≥45.0
Na2O ≤0.35
SO42- ≤2.5
Fe2O3 ≤0.80
Physical property
LOI , m% ≤13.0
Attrition Index, %/h ≤2.5
Bulk Density, g/cm3 0.6~0.8
Surface Area, m2/g ≥220
Pore Volume, ml/g ≥0.35
Particle Distribution
0~40μm, m% ≤18
0~149μm, m% ≥89
800oC/4h, % ≥74

Commercial Reference

The commercial trial of COKC-1 catalyst in 1# FCCU of SINOPEC Qilu Petrochemical started from December 2006 and finished in October 2008. Fresh catalyst make up conducted on a day-to-day base. COKC-1 content in inventory reached a level of 100% in October 2008. The Industrial application results are listed in Table 2. It can be seen that under the similar feed oil property and higher level of heavy metal contamination, the product distribution of performance test had noticeable improvement compared with that of blank test. The light oil yield increased by 0.77 percentage, among them the Gasoline yield increased by 2.00 percentage points, the total light liquid product yield increased by 0.70 percentage points, the yield of slurry was reduced by 0.37 percentage points, the coke yield was reduced slightly. Meanwhile the gasoline olefin content was reduced. The industrial application results show that the COKC-1 catalyst has an excellent performance covering excellent bottom cracking ability, higher gasoline selectivity and metal resistance capability.

Table 2 Industrial Application Results of COKC-1 Catalyst

Catalyst Reference COKC-1
Throughput, t/d 4152 3696
Resid blending ratio, % 26.59 44.74
Reaction temp., ℃ 509 507
Regeneration temp., o℃ 730 730
Feed Properties
Density (20℃), g/cm3 0.9197 0.9178
Carbon residue, m% 2.3 2.2
C, m% 86.90 86.94
H, m% 12.34 12.18
S, m% 0.63 0.57
N, m% 0.29 0.22
Fe, μg/g 2.1 2.7
Ni, μg/g 1.7 1.6
V, μg/g 2.1 5.1
Na, μg/g 0.9 0.1
Heavy metal content on E-cat, μg/g
Ni 1800 1500
Ca 800 1000
V 2700 2200
Sb 500 100
Products distribution, wt%
Dry gas 3.12 3.07
LPG 13.29 13.22
Gasoline 34.10 36.10
Light cycle oil 36.71 35.48
Slurry 5.78 5.41
Coke 6.42 6.32
Loss 0.58 0.40
Conversion, wt% 57.51 59.11
Gasoline + LCO, wt% 70.81 71.58
Total liquid yield, wt% 84.10 84.80
Gasoline quality
RON 94.0 94.6
Olefin content, m% 39.0 32.1
Inductive period, min 575 685

Commercial Application

The first commercial application of COKC-1 catalyst was conducted at SINOPEC Qilu Petrochemical in December 2006. By now the catalyst has been successfully tested and applied in a number of SINOPEC refineries such as Jinan Petrochemical, Zhanjiang Petrochemical, Maoming Petrochemical, etc.


COKC-1, COKC-2 and COKC-3