石油学报(石油加工) ›› 2019, Vol. 35 ›› Issue (1): 28-34.doi: 10.3969/j.issn.1001-8719.2019.01.003

• 研究报告 • 上一篇    下一篇

FCC汽油吸附脱砷剂的表征及其脱砷机理

刘坤红1,鞠雅娜1,兰玲1,王飞1,冯琪1,曹青1,葛少辉1,肖占敏1,周继升2   

  1. 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
  • 收稿日期:2018-01-05 修回日期:2018-08-28 出版日期:2019-01-25 发布日期:2019-01-29
  • 通讯作者: 刘坤红,男,工程师,硕士,从事油品及催化剂表征研究;E-mail:liukunhong@petrochina.com.cn E-mail:286464205@qq.com
  • 作者简介:第一作者:刘坤红,男,工程师,硕士,从事油品及催化剂表征研究,E-mail:liukunhong@petrochina.com.cn

Characterization of Adsorbents for FCC Gasoline Dearsenification and Related Mechanism

LIU Kunhong1, JU Yana1, LAN Ling1, WANG Fei1, FENG Qi1, CAO Qing1, GE Shaohui1, XIAO Zhanmin1, ZHOU Jisheng2   

  1. 1. Petrochemical Research Institute, CNPC, Beijing 100195, China;
    2. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2018-01-05 Revised:2018-08-28 Online:2019-01-25 Published:2019-01-29

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。研究发现,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。

关键词: 吸附脱砷剂, FCC汽油, 氧化铜, 机理

Abstract: 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 disappeares 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.

Key words: dearsenification adsorbent, FCC gasoline, CuO, mechanism