FCC催化剂的钒危害与捕钒剂研究I.钒危害与MgO、γ-Al_2O_3捕钒剂  

Study on the Vanadium Poisoning & VTrap in FCC Catalyst I. Vanadium Poison & Vtrapping Functions of MgO, γAl_2O_3

作　　者：李晓[1] 钱枫[2] 黄家祯[2] 王昕[1] 李承烈[1] 

机构地区：[1]华东理工大学石油加工研究所,上海200237 [2]华东理工大学分析测试中心

出　　处：《华东理工大学学报（自然科学版）》2000年第3期265-268,278,共5页Journal of East China University of Science and Technology

摘　　要：采用 XRD、BET、MAT以及 Pyridine- IR等方法 ,研究了钒对催化剂分子筛结构和裂化活性的危害 ,以及 Mg O、γ- Al2 O3对钒破坏作用的抑制。结果表明 ,在水蒸气条件下 ,钒使催化剂表面积减小 ,分子筛晶体结构破坏 ,各种酸的数量下降 ,裂化活性降低。捕钒物质的加入保护了催化剂的结构和酸性及活性 ,尤其以 Mg O负载在 γ- Al2 O3上得到的捕钒效果最佳。By the characterization of XRD, BET, pyridineIR, MAT, the vanadium poisoning of FCC catalysts & Vtrapping functions of MgO, γAl_2O_3 are described. Experimental results identify that: through the simultaneous actions of steam and vanadium, the surface area, acidity, and the activity of the FCC catalysts are decreased, and the crystal structure of zeolite is damaged; steam is the essential factor for the vanadium poison to catalysts. MgO and γAl_2O_3 both have the potential of preventing the catalysts from vanadium contamination, MgO loaded on Kaolin has the inferior Vtrapping performance than that of the MgO loaded on γAl_2O_3. Vanadium oxide can be used as the substitute of vanadium naphthenate in this field.

关 键 词：钒危害 催化裂化催化剂 捕钒剂 FCC催化剂 

分 类 号：TQ426.95[化学工程] TE624.91[石油与天然气工程—油气加工工程]