关键词:

催化裂解, 瓦斯油, 低碳烯烃, 产品性质

Abstract:

Reaction performance and product properties of catalytic pyrolysis of HGO (heavy gas oil) and LGO (light gas oil) derived from Canadian synthetic crude oil were investigated in a riser unit.The yield of total light olefins (ethylene, propylene, and butylene) showed a maximum with increasing reaction temperature and catalyst-to-oil mass ratio, decreased with increasing reaction time, and enhanced with increasing steam-to-oil mass ratio.The optimal reaction temperature, catalyst-to-oil mass ratio, reaction time and steam-to-oil mass ratio of catalytic pyrolysis of HGO were 620—640℃, 16, 2 s and 0.5, respectively.Under these optimal reaction conditions, the yields of ethylene, propylene and total light olefins reached 9.0%（mass）, 15.8%（mass） and 32.6%（mass）, respectively.There were large amounts of aromatics in pyrolysis gasoline, diesel and heavy oil fractions.Gasoline fraction contained above 80%（mass） of aromatics which were mainly toluene and C₈ aromatics.Diesel fraction contained above 60%（mass） of aromatics which were mainly single-ring and double-ring aromatics.Heavy oil fraction contained above 70%（mass） of aromatics which were mainly multi-ring aromatics.

Key words:

催化裂解, 瓦斯油, 低碳烯烃, 产品性质