OCT-ME催化裂化汽油超深度加氢脱硫技术的开发

为了满足未来“无硫汽油”新标准需要,中国石化抚顺石油化工研究院开发了FCC汽油超深度选择性加氢脱硫OCT-ME技术,该技术中FCC汽油先分馏, 轻馏分经无碱脱臭与FCC柴油吸收分馏,重馏分采用新研制的ME-1催化剂进行加氢脱硫。中试研究结果表明,无碱脱臭轻汽油与FCC柴油易于通过吸收分馏塔切割实现清晰分离,切割得到的轻汽油硫质量分数在4.0~6.0 μg/g之间; ME-1催化剂与参比剂相比,在反应温度低10 ℃的条件下,重汽油加氢脱硫产物的硫质量分数为5.0~8.0 μg/g时,烯烃饱和率降低22.7%~32.1%,RON少损失1.3~1.6个单位;OCT-ME技术能够在RON损失更低的情况下生产硫质量分数不大于10 μg/g的“无硫汽油”。

DEVELOPMENT OF OCT-ME TECHNOLOGY FOR ULTRA DEEP SELECTIVE DESULFURIZATION OF FCC GASOLINE

To produce "sulfur-free gasoline", OCT-ME technology for ultra deep selective desulfurization of FCC gasoline was developed by Fushun Research Institute of Petroleum and Petrochemicals, which consists of FCC naphtha fractionation, LCN (light catalytic naphtha) sodium–free sweetening and fractioning with FCC diesel cut, HCN (heavy catalytic naphtha) hydrodesulfurization over a newly developed ME-1 catalyst. Results of pilot plant research showed that sweetened LCN and FCC diesel cut was easy to be separated through absorption fractionation, the sulfur content of treated LCN was in the range of 4.0—6.0 μg/g; compared with reference catalyst, when using ME-1 catalyst at a reaction temperature of 10 ℃ lower than the base case, at the sulfur content of treated HCN in the range of 5.0—8.0 μg/g, the olefin saturation rate reduced 22.7%—32.1% and the RON loss was 1.3—1.6 units less, which indicated that OCT-ME technology could produce "sulfur-free gasoline" (sulfur content less than 10 μg/g) with less RON loss.