Technology

Technology optimized for propylene production

DCC-Pro (RTC)™ is based on DCC Technology (Fig.1), optimized for conversion of residue as the feed to produce propylene.

Figure 1 - DCC Platform

Reactor design innovation

DCC-pro (RTC) makes use of a new reactor design (Fig. 2) with:

• Higher catalyst concentration improving catalyst and oil molecular contact.
• Constant gas phase velocity (v), strenghthening diffusion and mass transfer, achieving stable fluidization state in the whole reactor.
• Uniform reaction temperature (T) with ΔT < 8°C across the reactor allowing for controlling thermal cracking reactions into H₂/CH₄ and increasing catalytic cracking reactions into propylene.

Figure 2 - DCC-pro reactor (left) vs. DCC reactor (right)

Optimized process yields

Table 1 presents the outcome of a DCC case study by revamping a DCC-1 plant with a capacity of 650,000 tonnes per year into a DCC-pro plant with a feed diet consisting in 50% hydrotreated resid and 50% hydrotreated vacuum gasoil. 

Table 1 - DCC Pro case study: Capacity *

*For each tonne of chemicals (Ethylene+Propylene),
CO₂ emissions are reduced by 19.98%

DCC-pro advantages

DCC-pro presents the following advantages:

• Higher ethylene & propylene yields,
• Higher ethylene & propylene concentration in the product gas,
• Lower coke yield and good selectivity,
• Lower off-gas (H₂, CH₄) yield,
• Lower CO₂ emission from coke and methane burning,
• Improved gasoline properties (increased RON & aromatics, lower olefins

Commercial Experience

DCC-pro is designed by SEI, and licensed by RIPP.

References

1. Jinquan Zhu, Shi Shou, 16^th Aug 2021, DCC Technology, Fluid Catalytic Cracking Technology Department, SINOPEC RIPP.