Abstract: The performance of LRC-99 catalyst for increasing diesel and the LDO-75 catalyst for increasing gasoline in Niger refinery FCC unit was introduced. The results show that the LRC-99 catalyst increases the total yield of light oil by 0.68 percentage points (diesel yield increases 1.52 percentage points, gasoline reduces 0.84 percentage points), indicating the ability of increasing diesel production of the LRC-99 catalyst. It is found that LRC-99 also has stronger anti-wear and anti-pollution by heavy metal than LDO-75 catalyst. At Ni content of 22.55 μg/g in feed and 15000μg/g on equilibrium catalyst, FCC unit using LRC-99 catalyst still provides a better product distribution.

Key words: fluid catalytic cracking, diesel yield, light oil yield, catalyst