高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (1): 113.

• 研究论文 • 上一篇    下一篇

乙二胺四乙酸改性对NiMo/Nano-HZSM-5催化剂脱硫性能的影响

靳凤英,郭新闻,王祥生   

  1. 大连理工大学化学化工学院, 大连 116012
  • 收稿日期:2010-06-01 修回日期:2010-10-08 出版日期:2011-01-10 发布日期:2010-12-11
  • 通讯作者: 王祥生 E-mail:wxsdw137@163.com

Influence of Ethylenediamine Tetraacetic Acid on the Hydrodesulfurization Activity of Nano HZSM-5 Supported NiMo Catalyst

JIN Feng-Ying, GUO Xin-Wen, WANG Xiang-Sheng*   

  1. College of Chemistry and Chemical Engineering, Dalian University of Technology, Dalian 116012, China
  • Received:2010-06-01 Revised:2010-10-08 Online:2011-01-10 Published:2010-12-11
  • Contact: WANG Xiang-Sheng E-mail:wxsdw137@163.com

摘要: 以水热处理的纳米HZSM-5为载体,通过螯合剂乙二胺四乙酸(EDTA)改性制备了一种具有较高脱硫活性和稳定性的EDTA-NiMo/HZSM-5催化剂,并用XRD、ICP、FT-IR、27Al MAS NMR、TG-DTA、Py-IR及NH3-TPD对催化剂进行了表征.结果表明,EDTA与载体之间具有较强的相互作用,这种强相互作用减弱了金属活性组分与载体之间的作用力,抑制非活性NiAl2O4、Al2(MoO4)3的形成,有利于活性组分在载体表面的分散,且添加的螯合剂与金属组分镍可以形成稳定的螯合物,在硫化过程中能改变催化剂的硫化顺序,促使有效脱硫活性中心的形成,提高了催化剂的脱硫活性和稳定性.

关键词: 乙二胺四乙酸, 镍, 钼, 纳米HZSM-5分子筛, 脱硫

Abstract: The effects of chelating ligands (nitrilotriacetic acid (NTA), 1,2-ethylenediamine (EN), citric acid (CA), glutamic acid, ethylene-diaminetetraacetic acid (EDTA) or trans-1,2-cyclohexanediamine-N,N,?,?-tetraacetic acid (CyDTA)) during the preparation of CoMo/Al2O3, CoMo/SiO2, NiMo/ SiO2 et al. were reviewed, however, the influence of chelating agent for hydrodesulfurization of catalyst over molecular sieve carrier no reports. In this paper, a new type of EDTA-NiMo/nano-HZSM-5 catalyst for FCC gasoline hydrodesulfurizaiton was prepared. The catalyst showed higher HDS activity and more stable HDS activity for FCC gasoline than the NiMo/nano-HZM-5 catalyst. And they were characterized by XRD, ICP, FT-IR, 27Al NMR, TG-DTA, PyIR, and NH3-TPD. The results indicated that there was a strong interaction between EDTA and nano-HZSM-5, which weakens the interaction between the active metal components and support, improves dispersion of active metal components on the surpport surface. Besides, it is the interantion between EDTA and Ni that promotes the reduction and sulfidation of catalyst. Therefore, the hydrodesulfurization activity of the catalyst is improved.

Key words: Ethylenediamine tetraacetic acid (EDTA), nickel, molybdenum, nano-HZSM-5 zeolite, Hydrodesulfurization (HDS)

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