催化裂化汽油萃取-光化学反应深度脱硫的研究

Deep Desulfurization of Fluid Catalytic Cracking Gasoline by Liquid-Liquid Extraction and Photo-Oxidation

从液液萃取-光化学脱硫工艺入手,研究光化学反应降解含硫化合物技术并探讨其动力学规律,同时还对光处理后的汽油烃族组成变化进行了考察。结果表明:光-磷钨酸-双氧水体系是催化汽油最佳的脱硫体系。1#、2#催化汽油含硫量分别降低了70%和80%,同时收率可达98%以上。光-甲酸(双氧水)-催化汽油体系中硫化物转化为水溶性砜和亚砜的反应符合一级反应动力学特征。

By using liquid-liquid extraction and photochemical desulfurization process, the technology for photochemical degradation of sulfur compounds and kinetics of reaction was investigated. Meanwhile the composition change for gasoline hydrocarbons was inspected. The experiment results show that total sulfur of two types of gasoline decrease by 70% and 80%, respectively, while the average yield of gasoline reaches above 98% under the optimal conditions with H2O2 solutions of phosphotungstic acid. The photochemical catalysis data in the peracid (HCOOH) system suggests that the reaction sulfur compounds are converted to their corresponding aqueous-soluble sulfoxide and sulfone follows the characteristic pseudo-first-order reaction kinetics.