多产低碳烯烃工艺参数的变化对产品选择性的影响  

EFFECT OF OPERATING PARAMETERS ON LOW CARBON OLEFIN SELECTIVITY

作　　者：许昀[1] 田辉平[1] 刘宇键[1] 朱亚东[2] 

机构地区：[1]中国石化石油化工科学研究院,北京100083 [2] 中国石化荆门分公司

出　　处：《石油炼制与化工》2014年第3期6-10,共5页Petroleum Processing and Petrochemicals

基　　金：中国石油化工股份有限公司合同项目(106023)

摘　　要：针对中国石化荆门分公司现有两套催化裂化装置(一催和二催)的目的产品不同(一催多产低碳烯烃,二催保持较高的液体收率和汽油产率),希望通过调整工艺参数满足要求。通过实验考察了反应时间、剂油比和再生温度对产物分布和选择性的影响。结果表明:延长反应时间,热裂化反应深度会显著增加,干气选择性和氢气产率明显增加,热裂化指数明显上升;增加剂油比是保持丙烯收率、增加总液体收率的优选方案;较高的初始油剂接触温度有利于低碳烯烃的生成,但如果以汽油、柴油为目的产物,则应该适当降低再生温度和油剂的初始接触温度,而不是降低反应温度。Low carbon olefins and distillates are produced separately by two FCC units in Jingmen Petrochemical Company. In order to obtain high selectivity for low carbon olefins and liquid product of distillates at the same time respectively by the two units,the operation parameters were examined,in-cluding reaction time,ratio of catalyst to oil,and regeneration temperature. The results show that these parameters have different effect on the selectivity and distillates yield. As the reaction time prolonged, thermal cracking will increase,resulting in more dry gas and H2. Increasing the ratio of catalyst to oil is the better way to keep the propylene yield and increase the total liquid yield. The higher initial oil-cata-lyst contact temperature is good for low carbon olefins formation. In case of high yields of gasoline and diesel needed,the regeneration temperature must be optimized.

关 键 词：低碳烯烃 操作参数 反应时间 剂油比 再生温度 

分 类 号：TQ221.2[化学工程—有机化工] TE624.41[石油与天然气工程—油气加工工程]