A concept of two different reaction zones was proposed based on the FCC reaction mechanism. The concept was used to design a novel reactor with corresponding operation measures. Experiments were conducted on the newly designed pilot plant riser reactor. In comparison 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 both contents of iso paraffin and aromatic increased by 6%, and its MON increased by 1.3 units while maintaining the RON of the naphtha unchanged, and its sulfur content reduced by 15% with a significant extension of its induction period for Shengli VGO+VR. The run test results of commercial trial were conformable with the results of pilot plant test.
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