FCC汽油吸附脱砷剂的表征及其脱砷机理  

Characterization of Adsorbents for FCC Gasoline Dearsenification and Related Mechanism

作　　者：刘坤红 鞠雅娜 兰玲 王飞 冯琪 曹青 葛少辉 肖占敏 周继升[2] LIU Kunhong;JU Yana;LAN Ling;WANG Fei;FENG Qi;CAO Qing;GE Shaohui;XIAO Zhanmin;ZHOU Jisheng(Petrochemical Research Institute of PetroChina Company Limited,Beijing 100195,China;State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]中国石油石油化工研究院,北京100195 [2]北京化工大学化工资源有效利用国家重点实验室,北京100029

出　　处：《石油学报（石油加工）》2019年第1期28-34,共7页Acta Petrolei Sinica(Petroleum Processing Section)

摘　　要：以活性炭为基体,以铜镍为活性组分制备吸附脱砷剂,采用FCC汽油为原料,在高空速下对脱砷剂进行失活评价。通过X射线衍射(XRD)、高分辨率的透射电镜(HRTEM)、X射线光电子能谱分析(XPS)等手段对脱砷剂的微观结构、晶体结构以及元素的化学状态进行了表征分析,深入研究了吸附脱砷剂的作用机理。结果表明:吸附脱砷后活性组分CuO的颗粒粒径明显增加,且活性组分CuO的晶格条纹消失,形成无定形物质;吸附脱砷后砷的存在状态主要以砷氧化物或者含氧有机砷化物的复杂形态存在,少量砷以金属砷化物和单质砷的简单形态存在。A dearsenification adsorbent was developed to remove arsenic in FCC gasoline.The adsorbent was prepared with activated carbon as carrier,and copper and nickel as active components.The morphology and structure of the adsorbent were characterized by X-ray diffraction(XRD),high resolution transmission electron microscope(HRTEM),X-ray photoelectron spectroscopy(XPS).In order to study the mechanism of dearsenization,the deactivation evaluation was tested with FCC gasoline in high space velocity.Then,the mechanism of adsorptive dearsenification for FCC gasolines was revealed by investigating the changes of micropore structure,crystal structure and chemical state of the elements before and after dearsenification.Results show that the size of the active components CuO particles is increased significantly,and the lattice fringes of CuO disappears after dearsenification.The adsorbed arsenic is mainly in the form of complex arsenic oxide and oxygenated organic arsenide.Small amount of arsenic exists in the form of arsenic oxide and arsenic.

关 键 词：吸附脱砷剂 FCC汽油 氧化铜 机理 

分 类 号：TE624[石油与天然气工程—油气加工工程]