Synthesis of Nanoporous Flower-like Y-SAPO-11 Composite Molecular Sieves for Hydrocracking of n-Hexadecane

被引:1
|
作者
Sun, Jingxiao [1 ]
Wang, Xiaohan [1 ]
Zhou, Yasong [1 ]
Wei, Qiang [1 ]
机构
[1] China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China
基金
中国国家自然科学基金;
关键词
composite molecular sieve; SAPO-11 molecular sieve; Y zeolite; hydrocracking; middle distillate; Y-ZEOLITE; CATALYSTS; HYDRODESULFURIZATION; PERFORMANCE; HYDROISOMERIZATION; ALUMINA; CRACKING; GALLIUM; OCTANE; ZR;
D O I
10.1021/acsanm.4c00135
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Middle-distillate hydrocracking nanoporous catalysts with good cracking activity and isomerization activity were prepared to improve the middle distillates such as kerosene and diesel quality and yield. Using a hydrothermal method, we synthesized nanoporous flower-like xY-SAPO-11 composite molecular sieves with different weight percentages. For comparison, Y + SAPO-11 mechanical mixture were also prepared by mechanical mixing. A series of characterization methods were used to characterize the composites and mechanical mixture. Hydrocracking catalysts Cat-xY-S and Cat-Y + S were prepared with composites and mechanical mixture as the support acidic components, respectively, and their catalytic performance in hydrocracking was investigated. It is demonstrated that nanoporous composite molecular sieves perform differently from mechanical mixture regarding physicochemical and catalytic properties. The Y-SAPO-11 composite molecular sieves have larger pore volumes and pore sizes and lower acidity than the mechanically mixed molecular sieves with the same weight percentage. This is caused by the interaction between the SAPO-11 and Y phases. This interaction leads to the SAPO-11 and Y phases being combined by chemical bonding, forming a coordination structure of the framework elements. The composite molecular sieves exhibited higher yields of C-8-C-12 products than mechanical mixtures in the hydrocracking reaction. When the Y-phase weight percentage was 61.7 wt %, i.e., the Cat-8Y-S catalyst with suitable cracking activity and isomerization activity, it had the highest isomerized C-8-C-12 product yield of 33.1% at 360 degrees C while maintaining a high C-8-C-12 product yield.
引用
收藏
页码:7582 / 7594
页数:13
相关论文
共 33 条
  • [31] Simple synthesis of 3D flower-like g-C3N4/TiO2 composite microspheres for enhanced visible-light photocatalytic activity
    Hu, Chaoyang
    E, Lei
    Hu, Kangkai
    Lai, Liuyuan
    Zhao, Dan
    Zhao, Wei
    Rong, Hui
    JOURNAL OF MATERIALS SCIENCE, 2020, 55 (01) : 151 - 162
  • [32] One-pot, self-assembled hydrothermal synthesis of 3D flower-like CuS/g-C3N4 composite with enhanced photocatalytic activity under visible-light irradiation
    Khan, Azam
    Alam, Umair
    Raza, Waseem
    Bahnemann, D.
    Muneer, M.
    JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 2018, 115 : 59 - 68
  • [33] Tailored synthesis of plate-like SAPO-11 molecular sieve and its application in non-noble metal-supported catalyst for efficient hydroisomerization of long-chain n-alkanes
    Dai, Xiaojun
    Cheng, Yan
    Liu, Tingting
    Mao, Lingjuan
    Wei, Qiang
    Zhou, Yasong
    CHEMICAL ENGINEERING JOURNAL, 2024, 480