ie4005496_si_001.pdf (66.52 kB)
In Situ Upgrading of Light Fluid Catalytic Cracking Naphtha for Minimum Loss
journal contribution
posted on 2013-05-15, 00:00 authored by Jinhong Zhang, Honghong Shan, Xiaobo Chen, Chunyi Li, Chaohe YangThe key to reducing the olefin content
in fluid catalytic cracking (FCC) gasoline is to upgrade the olefin-rich
light FCC naphtha (LCN). To minimize the naphtha loss, several parameters
were investigated in a pilot-scale riser FCC apparatus. The results
indicate that, besides the reaction temperature, the catalyst-to-oil
ratio, and the catalyst type, the boiling range and the olefin content
of LCNs also have significant influence on the upgrading effect. Moreover,
a relatively short residence time is beneficial for efficiently upgrading
LCNs. In addition, the influence of the reactor structure should be
brought to our attention. When a novel structurally changed reactor
with a multinozzle feed system was used, significantly increased olefin
conversion and decreased naphtha loss can be achieved. The calculation
of hydrogen balance indicates that, because of the decrease of dry
gas and coke yields, more hydrogen in the feed can be distributed
into the desired products.