摘要
针对精制液化气(LPG)的硫含量经常不能满足下游用户要求的情况,开展了在特定催化剂作用下以H_(2)O_(2)作为氧化剂的LPG高选择性超深度脱硫研究。以精制LPG中最常见的残余硫化物配制模型油,考察反应条件的影响,然后在最佳条件下对炼油厂精制C_(4)进行脱硫试验。结果表明:模拟油脱硫的最佳条件为采用C催化剂、反应温度35℃、n(H_(2)O_(2))n(S)=4∶1、H_(2)O_(2)纯度(质量分数)30%,此条件下其脱硫率可达98%以上;而在此条件下,精制C_(4)的脱硫率只有50%;通过优化混合方式,精制C_(4)的脱硫率可接近100%;该方法对精制C_(4)的烃组成影响很小,表明精制C_(4)氧化脱硫的选择性较高,未来有望用于LPG的超深度脱硫。
The sulfur content of refined liquefied petroleum gas(LPG)often fails to meet the requirements of downstream users.Therefore,the study of high selective and deep desulfurization of LPG with H_(2)O_(2)as oxidant under the specific catalyst was carried out.The most common residual sulfide in refined LPG was used to prepare model oil to explore the reaction conditions,and then the desulfurization test of refined C_(4) was carried out under the best conditions.The results show that when C is the catalyst,the reaction temperature is 35℃,the molar ratio of n(H_(2)O_(2))n(S)is 4,and the concentration of H_(2)O_(2)is 30%,the desulfurization rate of the simulated oil can reach more than 98%.Under the same conditions,the desulfurization rate of refined C_(4) is only 50%,but after optimizing the mixing mode of H_(2)O_(2),catalyst and refined C_(4),it is found that the desulfurization rate of refined C_(4) is close to 100%.In addition,the method has little effect on the hydrocarbon composition of hydrocarbon oil or refined C_(4),indicating that this method has higher selectivity for oxidative removal of sulfide,and is expected to be used for ultra deep desulfurization of LPG in the future.
作者
朱忠朋
梅学赓
吴明清
李涛
Zhu Zhongpeng;Mei Xuegeng;Wu Mingqing;Li Tao(SIONPEC Research Institute of Pretroleum Processing,Beijing 100083;Jiangsu Yangnong Chemical Group Co.Ltd.)
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2021年第7期18-23,共6页
Petroleum Processing and Petrochemicals
