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首页> 外文期刊>Fuel >Shape selectivity conversion of biomass derived glycerol to aromatics over hierarchical HZSM-5 zeolites prepared by successive steaming and alkaline leaching: Impact of acid properties and pore constraint
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Shape selectivity conversion of biomass derived glycerol to aromatics over hierarchical HZSM-5 zeolites prepared by successive steaming and alkaline leaching: Impact of acid properties and pore constraint

机译：通过连续蒸汽和碱性浸出制备的等级HZSM-5沸石来形成生物量衍生甘油的生物量衍生甘油的形状转化：酸性和孔隙约束的影响

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摘要

The selective production of light aromatics starting from biomass derived glycerol provides excellent prospect in reducing dependency on fossil resources and carbon dioxide emissions. The catalytic perfomances in glycerol to aromatics (GTA) procedure were systematically investigated for HZSM-5 catalysts with various porosity and acidic property, which were prepared by separate or multi-step treatments using NaOH and steaming on HZSM-5 zeolites. A consecutive steaming-alkali treatment of HZSM-5 zeolite enables the introduction of higher amounts of intra-mesoporosity with smaller-aperture (mainly at the range of 2-4 nm), which could be ascribed to the easier extraction of Si species in steaming treated HZSM-5 interior than that in steaming treated HZSM-5 outer surface. However, the combination of alkali-steaming treatment of HZSM-5 zeolite leads to a remarkable collapsion in the generated micro-mesopore hierarchical structure. Both the GTA reaction and coking process were varied with the HZSM-5 catalyst prepared by different post treatment means. Among all catalysts, 3 h 450 degrees C/0.3 M NaOH/HZSM-5 catalyst exhibited the highest BTX aroamtics yield, lowest coking rate and longest catalyst lifetime, which could be ascribed to the synergistic effect between the shape selectivity of micropores and size confinement of mesopores coupling with moderate acidity distribution in HZSM-5 crystals interior and surface for GTA process.
机译：从生物质衍生的甘油开始的光芳烃的选择性生产在减少对化石资源和二氧化碳排放的依赖性方面提供了出色的前景。用各种孔隙率和酸性特性系统地研究了甘油中至芳烃（GTA）程序的催化性化合物（GTA）程序，通过使用NaOH和在HzSM-5沸石上蒸汽进行分离或多步处理制备。 HzSM-5沸石的连续蒸碱处理能够引入较高量的中间内孔隙，具有较小的孔径（主要在2-4nm的范围内），这可以归因于蒸汽中Si种类的更容易提取经处理的HZSM-5内部比蒸汽处理过的HZSM-5外表面。然而，HZSM-5沸石的碱蒸气化处理的组合导致产生的微内孔等级结构的显着折叠。 GTA反应和焦化过程都与通过不同后处理装置制备的HZSM-5催化剂而变化。在所有催化剂中，3 H 450℃/ 0.3M NaOH / HZSM-5催化剂表现出最高的BTX aroamtitics产率，最低焦化率和最长的催化剂寿命，这可以归因于微孔的形状选择性与尺寸限制之间的协同效应HZSM-5晶体中适度酸度分布的中孔耦合，用于GTA工艺的晶体。

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  • 来源
    《Fuel》 |2020年第15期|116538.1-116538.9|共9页
  • 作者

    Wang Fei; Chu Xiaozhong; Zhao Pusu; Zhu Fengxia; Li Qiaoqi; Wu Feiyue; Xiao Guomin;

  • 作者单位

    Huaiyin Normal Univ Jiangsu Key Lab Chem Low Dimens Mat Jiangsu Key Lab Biomass Based Energy & Enzyme Tec Sch Chem & Chem Engn Huaian 223300 Peoples R China;

    Huaiyin Normal Univ Jiangsu Key Lab Chem Low Dimens Mat Jiangsu Key Lab Biomass Based Energy & Enzyme Tec Sch Chem & Chem Engn Huaian 223300 Peoples R China;

    Huaiyin Normal Univ Jiangsu Key Lab Chem Low Dimens Mat Jiangsu Key Lab Biomass Based Energy & Enzyme Tec Sch Chem & Chem Engn Huaian 223300 Peoples R China;

    Huaiyin Normal Univ Jiangsu Key Lab Chem Low Dimens Mat Jiangsu Key Lab Biomass Based Energy & Enzyme Tec Sch Chem & Chem Engn Huaian 223300 Peoples R China;

    Huaiyin Normal Univ Jiangsu Key Lab Chem Low Dimens Mat Jiangsu Key Lab Biomass Based Energy & Enzyme Tec Sch Chem & Chem Engn Huaian 223300 Peoples R China;

    Huaiyin Normal Univ Jiangsu Key Lab Chem Low Dimens Mat Jiangsu Key Lab Biomass Based Energy & Enzyme Tec Sch Chem & Chem Engn Huaian 223300 Peoples R China;

    Southeast Univ Sch Chem & Chem Engn Nanjing 211189 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
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  • 关键词

    Glycerol to aromatics; Successive treatment; Confinement effect;

    机译：甘油至芳烃;连续治疗;监禁效果;

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