多产高辛烷值汽油降低柴汽比的柴油催化转化技术

Diesel catalytic conversion process for high octane number gasoline production and diesel to gasoline ratio reduction

采用富B酸多级孔材料和高稳定性超稳Y型分子筛优化匹配催化剂,以及重质柴油和催化原料反应区特殊设置,中国石油兰州化工研究中心开发了多产高辛烷值汽油降低柴汽比的柴油催化转化工艺(DCP)技术,并在中国石油兰州石化公司1.2 Mt/a重油催化裂化装置上进行了工业试验标定。结果表明:与空白标定结果相比,DCP技术工业试验催化装置掺炼10%(质量分数)减一线柴油后,总液体、液态烃、汽油收率依次增加0.81,0.55,1.28个百分点,柴油、油浆、干气收率依次减少1.02,0.87,0.26个百分点,焦炭收率及损失率增加0.32个百分点,装置柴汽比下降0.02;催化稳定汽油研究法辛烷值增加1.1个单位,烯烃、芳烃体积分数分别增加2.43,0.41个百分点,正构烷烃、异构烷烃、环烷烃体积分数依次降低0.75,1.24,0.86个百分点。

Hierarchical porous materials that rich in bronsted acid and ultra-stable Y-type zeolites with high stability were used to optimize the fluid catacytic cracking(FCC)catalysts and the reaction zones of heavy diesel and catalytic cracking feedstock were specially configured.Diesel catalytic conversion process(DCP)for high octane number gasoline production and lower diesel to gasoline ratio was developed by Lanzhou Petrochemical Research Center of PetroChina.The commercial test of DCP technology was carried out on the RFCC unit with a capacity of 1.2 Mt/a in Lanzhou Petrochemical Company,PetroChina.The results showed that in the testing period,compared with the base case result,after the DCP technology was applied on the RFCC unit while blending 10%straight distillation diesel,the yields of total liquid,liquid hydrocarbon and gasoline had increased by 0.81,0.55 and 1.28 percentage points respectively;the yields of diesel,slurry and dry gas had decreased by 1.02,0.87 and 0.26 percentage points respectively;the yields of coke and loss had increased by 0.32 percentage points;the ratio of diesel to gasoline had decreased by 0.02;the research octane number of FCC stabilized gasoline had increased by 1.1 units;the volume fractions of olefins and aromatics had increased by 2.43 and 0.41 percentage points,respectively;and the volume fractions of n-alkanes,isoalkanes and cycloalkanes had decreased by 0.75,1.24 and 0.86 percentage points,respectively.