关键词: 催化裂化汽油, 烯烃, 反应规律, 反应热

Abstract:

As for the reformulation of FCC naphtha for olefin reduction over catalytic cracking catalysts, the reaction behavior was studied in a confined fluidized bed reactor.The influences of reaction temperature, catalyst to oil mass ratio and space velocity on product yields and octane number were investigated.The optimal operating conditions were obtained as follows: reaction temperature within 400—430℃, catalyst to oil mass ratio about 7 and space velocity about 20—30 h-1.The olefin content of FCC naphtha was significantly reduced by more than 40%,gasoline octane number was maintained, and the loss of fuel gas and coke was less than 2%(mass).Iso-paraffin and aromatics content was increased after reformulation.The reaction heat was also computed according to the product composition and its influence factors were analyzed.The results indicated that the process was exothermic at a low temperature and endothermic at a high temperature.The effects of reformulation conditions on the reaction heat was in the order of reaction temperature>catalyst to oil mass ratio>space velocity.

Key words: 催化裂化汽油, 烯烃, 反应规律, 反应热