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首页> 外文期刊>Fuel >Synthesis of ZSM-5 using different silicon and aluminum sources nature for catalytic conversion of lignite pyrolysis volatiles to light aromatics
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Synthesis of ZSM-5 using different silicon and aluminum sources nature for catalytic conversion of lignite pyrolysis volatiles to light aromatics

机译：利用不同硅和铝源性质的ZSM-5合成，催化转化褐煤热解挥发物至轻质芳烃

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摘要

ZSM-5 zeolites with different physicochemical property were synthesized using different silicon (Si) and aluminum (Al) sources by hydrothermal method with controlling Al and Si addition. Different crystal shapes were observed from three Si sources. Al sources can influence crystal formation during crystallinity. Al nature causes different amorphous species which affect zeolite activity by blocking the accessible pores. A feasible mechanism of Si and Al sources for crystallization of zeolite was proposed. The activity for lignite volatiles-to-aromatics (LVTA) reaction was investigated to obtain light aromatics. Zeolite using tetraethylortho silicate and aluminum sulfate octahydrate as Si and Al sources shows large surface area and more accessible pores which cause excellent BTEXN yield (23.7 mg/g). The tar yield in the process of LVTA reaction is associated with both porous and acid properties while excessive acidity may cause the formation of coke on the zeolite which causes the blockage. ZSM-5 with optimum and accessible acid sites and abundant pores give a high tar yield and low coke yield. This work provides a ZSM-5 catalyst with suitable acidity and pore property for LVTA reaction.
机译：使用不同的硅（Si）和铝（Al）来源合成具有不同物理化学性质的ZSM-5沸石，通过控制Al和Si加入的水热法合成。从三种Si来源观察到不同的晶体形状。 Al Sources可以影响结晶度期间的晶体形成。 Al Nature通过阻塞可触及的毛孔导致影响沸石活性的不同无定形物种。提出了一种可行的Si和Al来源的机制，用于沸石结晶。研究了褐煤挥发物至芳烃（LVTA）反应的活性以获得轻质芳烃。沸石使用四乙基乙其硅酸盐和硫酸铝烯丁烷作为Si和Al来源显示出大的表面积和更易于易于的孔，引起优异的Btexn产率（23.7mg / g）。 LVTA反应过程中的焦油产量与多孔和酸性特性有关，同时过量酸度可能导致沸石上的焦炭形成，这导致堵塞。 ZSM-5具有最佳和可偏转的酸性位点和丰富的毛孔，具有高焦油产量和低焦炭产量。该工作提供了一种具有合适的酸度和孔隙性的ZSM-5催化剂，用于LVTA反应。

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  • 来源
    《Fuel》 |2020年第may15期|117286.1-117286.8|共8页
  • 作者

    Wang Yan-Jun; Cao Jing-Pei; Ren Xue-Yu; Feng Xiao-Bo; Zhao Xiao-Yan; Huang Yong; Wei Xian-Yong;

  • 作者单位

    China Univ Min & Technol Key Lab Coal Proc & Efficient Utilizat Minist Educ Xuzhou 221116 Jiangsu Peoples R China;

    China Univ Min & Technol Key Lab Coal Proc & Efficient Utilizat Minist Educ Xuzhou 221116 Jiangsu Peoples R China;

    China Univ Min & Technol Key Lab Coal Proc & Efficient Utilizat Minist Educ Xuzhou 221116 Jiangsu Peoples R China;

    China Univ Min & Technol Key Lab Coal Proc & Efficient Utilizat Minist Educ Xuzhou 221116 Jiangsu Peoples R China;

    China Univ Min & Technol Key Lab Coal Proc & Efficient Utilizat Minist Educ Xuzhou 221116 Jiangsu Peoples R China;

    Nanjing Forestry Univ Coll Mat Sci & Engn Nanjing 210037 Peoples R China;

    China Univ Min & Technol Key Lab Coal Proc & Efficient Utilizat Minist Educ Xuzhou 221116 Jiangsu Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Lignite pyrolysis; ZSM-5; Crystallization; Acid site; Light aromatics;

    机译：褐煤热解;ZSM-5;结晶;酸遗址;轻芳香学;

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