Project Description

Special Catalyst For CPP Process fcc catalyst

Applicable Scope

CPP (Catalytic Pyrolysis Process) catalysts are developed for CPP process, which is the commercial process using heavy feeds aiming at ethylene and propylene production.


RIPP has developed CPP technologies for meeting the increasing demands of light products. With the specific heavy feed and suitable operation, the ethylene and propylene yield of CPP have been up to 20% and 18% respectively. With a low specification in operation pressure and a large scale in processing capacity, CPP has a comparative sweeter operation conditions, suitable for clients with an economical investment.

Design Philosophy

CPP catalysts are seeking for high ethylene and propylene selectivity. The catalysts have high matrix activity for bottom primary cracking. Mesopore zeolites have been used for further secondary cracking. The active sites for selective pyrolysis are indispensable. The hydrogen transfer reactions need to be controlled. CPP unit has much more severity on operating conditions than FCCU, and the catalysts have high hydrothermal stability and metals tolerance.


Table 1 Main Specifications of CPP Catalyst

CPP catalyst
Chemical components, m%
Al2O3 ≥45
Na2O ≤0.3
Physical property:
LOI, m% ≤13.0
Attrition Index, %/h ≤3.0
Attrition Index, g/ml 0.72-0.85
Surface Area, m2/g ≥150
Pore Volume, ml/g ≥0.22
Particle Distribution
0-40 μm, m% ≤20
0-149 μm, m% ≥90
DMA 800℃/4h ≥65

Commercial Reference

CPP feedstock has been extended to heavy oils, such as VGO, mixed feed of VGO and vacuum residue, atmospheric residue.

Table 2 Comparison of CPP and DCC: Operating Conditions

Feedstock VGO, CGO, AR, VR VGO, VGO + VR, AR
Reaction Temp. Base case +70℃
Catalyst/oil Ratio Base case More
Regeneration Temp. Base case +40℃
Residence Time Base case Lower
Steam/oil Ratio Base case More

Table 3 Comparison of CPP and DCC: Products Distribution

Ethylene Base case 1.5-3 times
Propylene Base case 60-80%
Isobutylene Base case 60%
Naphtha Base case -80%
LCO Base case Less

Commercial Application

Location Capacity, tons/a Startup Date/Status
Daqing, China 80000 2000.10
Shenyang, China 500000 2009.6
Shanxi Yanchang, China 1,500,000 2014


Catalysts Performance
CEP-1 High propylene selectivity
OEP-1 High hydrothermal stability
Epylene-1 High ethylene and propylene selectivity