钒污染对CRC－3 FCC催化剂选择性的影响及钝钒剂的研究  

THE EFFECTS OF VANADIUM ON SELECTIVITY OF CRC-3 FCC CATALYST AND VANADIUM PASSIVATOR

作　　者：李嘉庆[1] 张在龙[1] 周世新[1] 王槐平[1] 蔺五正[1] 

机构地区：[1]石油大学炼制系

出　　处：《石油大学学报（自然科学版）》1996年第3期88-91,共4页Journal of the University of Petroleum,China(Edition of Natural Science)

摘　　要：以正庚烷为裂化原料，采用微反活性评价装置和气相色谱分析方法研究了重金属钒对ＣＲＣ－３裂化催化剂选择性的影响，并用Ｘ射线衍射仪测定了经钒污染后催化剂相对结晶度的变化．结果表明，ＣＲＣ－３催化剂上沉积的钒具有脱氢活性，明显降低了催化剂的裂化反应选择性和相对结晶度．向ＣＲＣ－３催化剂中加入高岭土或α－Ａｌ２Ｏ３担载的稀土氧化物（ＲＥ２Ｏ３），可明显提高催化剂的抗钒污染能力．The effects of vanadium on selectivity of CRC-3 FCC catalyst was studied by means of measuring composition change of n-Heptane cracking, products with fixed-bed microreactor-chromatography. The relative crystallinity was determined by X-ray diffraction (XRD). The results show that the vanadium deposited on CRC-3 has a dehydro-activity which decreases the selectivity and relative crystallinity of CRC-3 catalyst. The addition of passivator can apparently improve the vanadium passivation ability of CRC-3 catalyst.

关 键 词：裂化催化剂 重金属 污染 钒 钝化作用 

分 类 号：TE624.99[石油与天然气工程—油气加工工程]