高等学校化学学报

高等学校化学学报 ›› 2005, Vol. 26 ›› Issue (12): 2351.

• 研究快报 • 上一篇    下一篇


CuNaY分子筛上汽油馏分中含硫组分的选择吸附及其红外光谱研究

田福平1,2,吴维成2,蒋宗轩2,杨永兴2,蔡天锡1,李灿2   

  1. 1.大连理工大学精细化工国家重点实验室,大连116012;
    2.中国科学院大连化学物理研究所催化基础国家重点实验室,大连116023
  • 收稿日期:2005-07-13 出版日期:1905-03-14 发布日期:1905-03-14
  • 通讯作者: 李灿(1960年出生)，男，博士，研究员，博士生导师，中国科学院院士.从事催化方面研究. E-mail: canli@dicp.ac.cn
  • 基金资助:

    国家“九七三”计划项目(批准号： G2000048003)资助.

IR Spectroscopic Study on Selective Adsorption of Sulfur-containing Compounds from Gasoline Distillation on Copper-exchanged Y Zeolite

TIAN Fu-Ping1,2,WU Wei-Cheng2,JIANG Zong-Xuan2,YANG Yong-Xing2,CAI Tian-Xi1,LI Can2*   

  1. 1.State Key Laboratory of Fine Chemicals,Dalian University of Technology,Dalian 116012,China; 2.State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China
  • Received:2005-07-13 Online:1905-03-14 Published:1905-03-14
  • Contact: LI Can;E-mail: canli@dicp.ac.cn

摘要：

本文从基础研究的角度出发,以红外光谱技术为主要研究手段,以噻吩为汽油馏分中含硫有机分子的模型化合物,首次给出了噻吩分子在吸附剂表面的吸附方式和吸附位,以及芳烃对噻吩吸附的影响等红外光谱信息.为避免吸附剂的强酸性可能引起的干扰,采用NaY分子筛为原料进行液相离子交换制备吸附剂.

关键词: 吸附;CuNaY分子筛;芳香化合物;噻吩;IR光谱

Abstract:

Desulfurization of gasoline distillation with adsorption was studied at ambient temperature and pressure by using CuNaY(NaY exchanged with copper nitrate aqueous solution) as the adsorbents.The gasoline distillation was composed of thiophene-cyclohexane solution(115.0 μg/mL) with or without toluene.For the solution without toluene,no detectable sulfur was found in the effluent when the effluent volume was less than 40 mL,while the addition of toluene resulted in an evident drop of the adsorption performance for CuNaY.FTIR spectra indicate that the conversion of Cu2+ to Cu+ took place during the pretreatment of CuNaY adsorbent,and the interaction mode between the adsorbed thiophene molecules and Cu+ is π complexation.This adsorption mode is easily affected by aromatic compounds,resulting in the significant decrease of adsorption capacity in model gasoline containing toluene on CuNaY.

Key words: Adsorption; Copper-exchanged Y zeolite; Aromatic compound; Thiophene; IR spectroscopy

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