A modified FCC process for maximizing isoparaffins (MIP) in cracked naphtha

A concept of two different reaction zones was proposed based on the FCC reaction mechanism. The concept was used to design a new reactor with corresponding operation mechanisms. Experiments were conducted on the newly designed pilot-plant riser reactor. Comparing with the conventional FCC at relatively equivalent conversion, the pilot-plant test results showed that the olefin content in the cracked naphtha dropped by 12.4%, and contents of both isoparaffin and aromatics increased by 6%. MON increased by 1.3 units while maintaining the RO N of the naphtha unchanged, and sulfur content reduced by 15% with a significant extension of induction period for Shengli VGO + VR. The run test results of commercial trial agreed well with those of pilot-plant test.