New Catalytic Materials for Upgrading Light Cycle Oil via Selective Ring Opening Process

摘要

LCO, which accounts for approximately 10-20% of FCC products,.is a highly interesting blending stock to diesel pool because of the boiling point range similarity. The major disadvantages of LCO, on the other hand, are primarily related to the high content and the structural complexity of mainly bulky multiring polynuclear aromatics. The current upgrading options (i.e. direct blending, catalytic saturation and hydrocracking) are not capable of meeting the current fuel specifications, let alone those of the future2. The blending option of LCO prior to upgrading would adversely impact the diesel fuel, resulting in properties way far from the imposed fuel specifications. The conventional upgrading technologies (aromatic saturation and hydrocracking) have reached their full potential and can not meet the current stringent fuel specifications. Recently, selective ring opening (SRO) approach has been proposed as an alternative. Yet, none of the studied SRO based catalysts (i.e. zeolites, ordered mesoporous silica, mixed oxides) achieved the great potentials of SRO process. This, is mainly due to structural instability, diffusion limitations, strong acidity and fast deactivation.