COKC Series Catalyst FCC catalyst
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.
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%|
|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|
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
|Resid blending ratio, %||26.59||44.74|
|Reaction temp., ℃||509||507|
|Regeneration temp., o℃||730||730|
|Density (20℃), g/cm3||0.9197||0.9178|
|Carbon residue, m%||2.3||2.2|
|Heavy metal content on E-cat, μg/g|
|Products distribution, wt%|
|Light cycle oil||36.71||35.48|
|Gasoline + LCO, wt%||70.81||71.58|
|Total liquid yield, wt%||84.10||84.80|
|Olefin content, m%||39.0||32.1|
|Inductive period, min||575||685|
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