无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2023, Vol. 55 ›› Issue (2): 141-148.doi: 10.19964/j.issn.1006-4990.2022-0316

• 催化材料 • 上一篇    

氮化SBA-15负载高分散过渡金属用于丙烷高效直接脱氢

李海涛1(),赵银峰2()   

  1. 1.沈阳化工大学,辽宁沈阳 110142
    2.中国科学院大连化学物理研究所,低碳催化技术国家工程研究中心,辽宁大连 116023
  • 收稿日期:2022-05-23 出版日期:2023-02-10 发布日期:2023-02-16
  • 作者简介:李海涛(1994— ),男,硕士研究生,从事丙烷脱氢新型催化剂研究;E-mail:1435913777@qq.com

Nitriding SBA-15 loaded highly dispersed transition metals for efficient direct dehydrogenation of propane

LI Haitao1(),ZHAO Yinfeng2()   

  1. 1. Shenyang University of Chemical Technology,Shenyang 110142,China
    2. Dalian Institute of Chemical Physics,Chinese Academy of Sciences,National Engineering Research Center of Lower-Carbon Catalysis Technology,Dalian 116023,China
  • Received:2022-05-23 Published:2023-02-10 Online:2023-02-16

摘要:

以氮化法修饰的介孔二氧化硅(SBA-15)为载体,采用浸渍法制备了不同过渡金属(钴、镍、铁、铜)脱氢催化剂。通过X射线衍射光谱和N2吸附-脱附分析表明氮化后的载体仍能保持良好的介孔结构;通过扫描电子显微镜分析表明金属处于高度分散的良好状态;通过程序升温还原和X射线光电子能谱分析表明氮化SBA-15改变了金属的电子结构,增强了载体与金属之间的相互作用力。采用定量浸渍法制备了金属负载量为1%(质量分数)的脱氢催化剂,并进行了性能评价。结果表明,丙烷脱氢催化剂活性顺序由高到低依次为Co-SBA-15N900-1%、Fe-SBA-15N900-1%、Cu-SBA-15N900-1%、Ni-SBA-15N900-1%,其中Co-SBA-15N900-1%催化剂的丙烷转化率为33%,丙烯选择性为88%。

关键词: 丙烷脱氢, 过渡金属, 高分散, 氮化SBA-15

Abstract:

Dehydrogenation catalysts with different transition metals of Co,Ni,Fe,Cu were prepared by impregnation method with SBA-15 modified by nitridation method as carrier.The mesoporous structure of the support after nitridation was confirmed by X-ray diffraction(XRD) and N2 adsorption desorption analysis.Scanning electron microscopy(SEM) confirmed that the metal was in a good state of high dispersion.Temperature programmed reduction(H2-TPR) and X-ray photoelectron spectroscopy(XPS) proved that nitriding SBA-15 changed the electronic structure of the metal,and the interaction between the carrier and the metal was significantly enhanced.Metal-loaded samples with a content of 1% were prepared by quantitative impregnation method,and their properties were evaluated.The experimental results showed that the order of catalytic PDH activity of different metals for propane dehydrogenation was Co-SBA-15N900-1%,Fe-SBA-15N900-1%,Cu-SBA-15N900-1%,Ni-SBA-15N900-1%.The Co-SBA-15N900-1% exhibited a propane conversion of 33% and a propylene selectivity of 88%,indicating its promising utilization in industry.

Key words: dehydrogenation of propane, transition metals, high dispersion, nitrided SBA-15

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