Abstract: Using macroporous alumina carrier and new Mo(W) hybrid nanocrystalline active metal precursor, three main catalysts, GDS-22, GDS-32 and GDS-42, applied in GARDES-II FCC gasoline hydroupgrading technology was developed by using alumina crystal plane control technology, molecular sieve in-situ composite method and innovative catalyst preparation method and applied on the 1.2 Mt/a FCC gasoline hydrogenation unit of PetroChina Ningxia Petrochemical Branch Company in August 2017. The results showed that compared with the first generation GARDES technology, GARDES-II technology with the new catalysts showed stronger comprehensive ability of ultra-deep desulfurization, olefin reduction and octane number maintenance. In addition, GARDES-II technology has been applied in gasoline hydrogenation units of 5 companies including PetroChina Hohhot Petrochemical Company. The total processing capacity of the units has reached 6.5 Mt/a. Among them, the sulfur mass fraction of blended gasoline of Hohhot Petrochemical Company was reduced to 6.5-8.0 μg/g. The doctoral test was passed, the olefin volume fraction was reduced by 7.0 to 11.0 percentage points, and the gasoline octane number loss was 1.1 to 1.3. The output gasoline could meet the China VI (A) clean gasoline standard through the whole plant blending.

Key words: gasoline upgrading, olefins, GARDES-II technology, hydrogenation catalyst