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TiO2-蒙脱土复合载体在平板式脱硝催化剂中的应用

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常峥峰, 黄力, 王虎, 纵宇浩, 周军. TiO2-蒙脱土复合载体在平板式脱硝催化剂中的应用[J]. 矿产综合利用, 2022, 43(6): 30-35. doi: 10.3969/j.issn.1000-6532.2022.06.006
引用本文: 常峥峰, 黄力, 王虎, 纵宇浩, 周军. TiO2-蒙脱土复合载体在平板式脱硝催化剂中的应用[J]. 矿产综合利用, 2022, 43(6): 30-35. doi: 10.3969/j.issn.1000-6532.2022.06.006
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Chang Zhengfeng, Huang Li, Wang Hu, Zong Yuhao, Zhou Jun. Application of TiO2-Montmorillonite Composite Carrier in Plate-type De-NOx Catalyst[J]. Multipurpose Utilization of Mineral Resources, 2022, 43(6): 30-35. doi: 10.3969/j.issn.1000-6532.2022.06.006
Citation: Chang Zhengfeng, Huang Li, Wang Hu, Zong Yuhao, Zhou Jun. Application of TiO2-Montmorillonite Composite Carrier in Plate-type De-NOx Catalyst[J]. Multipurpose Utilization of Mineral Resources, 2022, 43(6): 30-35. doi: 10.3969/j.issn.1000-6532.2022.06.006
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TiO2-蒙脱土复合载体在平板式脱硝催化剂中的应用

  • 大唐南京环保科技有限责任公司，江苏　南京　211111

  • 基金项目: 江苏省科技成果转化专项资金项目（BA2017095）；江苏省博士后科研资助计划（2018K076C）、中国博士后科学基金（2019M651632）
详细信息
    作者简介: 常峥峰（1988-），男，博士，高级工程师，研究方向为大气烟气治理

  • 中图分类号: X511

Application of TiO2-Montmorillonite Composite Carrier in Plate-type De-NOx Catalyst

  • Datang Nanjing Environmental Protection Technology Co., Ltd, Nanjing, Jiangsu, China

    摘要

  • 为提升平板式脱硝催化剂性能，以TiO2-蒙脱土、TiO2-酸改性蒙脱土为复合载体进行催化剂的制备。采用XRF、XRD、N2-吸附脱附、拉曼光谱、H2-TPR、NH3-TPD等表征手段对催化剂的物理化学性能进行分析。结果显示：与传统V2O5-MoO3/TiO2催化剂相比，采用上述复合载体制备的脱硝催化剂具有更高的比表面积和耐磨强度。V2O5-MoO3/TiO2-蒙脱土催化剂中碱金属元素（Na、K）的存在，降低了催化剂的还原性能和酸性性能，对催化剂的脱硝活性有负面影响。相比蒙脱土，酸改性蒙脱土的比表面积较高，碱金属元素含量降低，所以V2O5-MoO3/TiO2-酸改性蒙脱土催化剂的脱硝活性较高。此外，该催化剂还具备优良的抗SO2、H2O性能。

    In order to improve the catalytic property of the plate-type De-NOx catalysts, TiO2-montmorillonite and TiO2-acid treated montmorillonite were used as the composite carriers for the preparation of the catalyst. XRF, XRD, N2-adsorption, Raman, H2-TPR and NH3-TPD analysis were carried out to investigate the physical and chemical properties of the catalysts. The result shows that the BET surface area and the attrition strength of the catalysts with the using of composite carriers are higher than that of the traditional V2O5-MoO3/TiO2 catalyst. Alkali metal element (Na, K) contained in the montmorillonite has negative effect on the reducibility and acidity of V2O5-MoO3/TiO2-montmorillonite catalyst, which is unfavorable for the catalytic performance. The acid treatment improves the BET surface area of the montmorillonite, and decreases the alkali metal element content simultaneously. As a result, the catalytic activity of V2O5-MoO3/TiO2-acid treated montmorillonite catalyst is relatively high. Addtionally, this catalyst also exhibits well SO2 and H2O resistance.

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  • 图 1  催化剂脱硝性能评价装置流程

    Figure 1. 

    下载: 全尺寸图片 幻灯片

    图 2  不同催化剂的XRD

    Figure 2. 

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    图 3  不同蒙脱土的N2-吸附脱附等温线

    Figure 3. 

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    图 4  不同催化剂的拉曼光谱

    Figure 4. 

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    图 5  不同催化剂的H2-TPR

    Figure 5. 

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    图 6  不同催化剂的NH3-TPD

    Figure 6. 

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    图 7  不同催化剂的脱硝性能

    Figure 7. 

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    图 8  MM-3催化剂的抗SO2, H2O性能

    Figure 8. 

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    表 1  不同催化剂的XRF分析结果/%

    Table 1.  XRF results for the different catalysts

    催化剂V2O5
    		MoO3
    		Na2O
    		K2O
    MM-11.432.890.070.01
    MM-21.452.860.110.21
    MM-31.422.880.080.09
    下载: 导出CSV

    表 2  不同催化剂的孔结构分析数据和机械性能

    Table 2.  Textural properties and attrition strength of the different catalysts

    催化剂比表面积/
    (m2·g-1)    		孔容/
    (cm3·g-1)    		平均孔径/
    nm    		耐磨强度/
    (mg·100 r-1)
    TiO282.430.36117.24-
    蒙脱土210.220.3648.09-
    酸改性
    蒙脱土    		253.480.4255.74-
    MM-176.010.31217.6174.8
    MM-295.910.33914.2655.4
    MM-397.560.34814.1554.9
    下载: 导出CSV
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收稿日期:  2020-12-08
刊出日期:  2022-12-25

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