催化裂化过程含硫化合物转化规律探讨  

Discussion on transformation mechanism of different sulfur compounds in FCC process

作　　者：武传朋 郭大为[1] 毛安国[1] 达志坚[1] 张晨昕[1] WU Chuanpeng;GUO Dawei;MAO Anguo;DA Zhijian;ZHANG Chenxin(SINOPEC Research Institute of Petroleum Processing,Beijing 100083,China)

机构地区：[1]中国石化石油化工科学研究院,北京100083

出　　处：《能源化工》2018年第4期1-8,共8页Energy Chemical Industry

基　　金：国家自然科学基金资助项目(U21576096)

摘　　要：原料油中所含硫化合物对催化裂化工艺以及产品性质会产生不利的影响。综述了不同类型硫化合物在催化裂化过程中的转化规律及其反应机理。在催化裂化反应条件下,硫醇、硫醚等非噻吩硫主要发生裂化反应生成硫化氢,而噻吩类硫化合物由于噻吩的环状共轭体系比较稳定,在催化裂化反应条件下难以发生开环裂化脱硫反应,主要发生烷基化和缩合生焦反应。此外,还探讨了原料油中的硫化合物经催化裂化反应后在油品中的分布,以及催化裂化操作条件对原料油中硫化合物的转化率、反应路径的选择性以及含硫产物在油品中分布的影响。认为今后应从热力学和动力学方面研究不同类型硫化合物在催化裂化过程中的转化规律,以利于脱硫催化剂或助剂的开发以及催化裂化工艺参数的调变。The FCC process and products properties can be adversely affected by the sulfur compounds in the raw oil. The distribu？tion and reaction mechanism of different sulfur compounds in FCC are summarized. Under the FCC reaction conditions, non？thiophenesulfides, such as mercaptan and sulfoether, are mainly cracked to generate hydrogen sulfide. However, the thiophene sulfides, whichare more stable due to the cyclic conjugated system of thiophene, are hardly cracked in open loop and desulfurized. Thus, the alkylationand condensation coke reactions mainly occur for the thiophene sulfides. Moreover, the distribution of sulfides in the feedstock after thecatalytic cracking reaction is discussed, and the influences of the FCC reaction conditions on the conversion of sulfides in the feed？stock, the selection of reaction path and the distribution of sulfur compounds in the oil products are reviewed. It is thought that the fu？ture study should be strengthen in the transformation mechanism of different sulfur compounds in FCC process from thermodynamics andkinetics, which is beneficial to development of desulfurization catalyst and modulation of FCC technical parameters.

关 键 词：催化裂化 硫化合物 硫醇 噻吩 苯并噻吩 

分 类 号：TE624.41[石油与天然气工程—油气加工工程]