元素(Ce、Co、La、Sn)掺杂对V-Mo/TiO2催化剂脱硝活性的影响

doi:10.11896/cldb.19100157

材料导报

2021, Vol. 35

Issue (6): 6020-6027 https://doi.org/10.11896/cldb.19100157

无机非金属及其复合材料

元素(Ce、Co、La、Sn)掺杂对V-Mo/TiO₂催化剂脱硝活性的影响

吴彦霞¹, 梁海龙¹, 陈鑫¹, 陈琛¹, 王献忠², 戴长友³, 胡利明¹, 陈玉峰¹

1 中国建筑材料科学研究总院,陶瓷科学研究院,北京 100024
2 萍乡学院江西省工业陶瓷重点实验室,萍乡 337055
3 瑞泰科技股份有限公司,北京 100024

Effect of Element (Ce, Co, La, Sn) Doping on Denitration Activity of V-Mo/TiO₂ Catalysts

WU Yanxia¹, LIANG Hailong¹, CHEN Xin¹, CHEN Chen¹, WANG Xianzhong², DAI Changyou³, HU Liming¹, CHEN Yufeng¹

1 Ceramics Science Institute, China Building Materials Academy, Beijing 100024, China
2 Jiangxi Provincial Key Laboratory of Industrial Ceramics, Pingxiang University, Pingxiang 337055, China
3 Ruitai Technology Co., Ltd., Beijing 100024, China

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摘要采用浸渍法制备了一系列V-Mo/TiO₂催化剂,考察了钒含量、钼含量及元素(Ce、Co、La、Sn)掺杂对催化剂脱硝活性的影响,并利用XRD、BET、H₂-TPR、NH₃-TPD及XPS等方法对催化剂的理化性能及结构进行了表征。结果显示,钒最佳含量为3%,钼最佳含量为6%。将Ce、La、Co、Sn掺杂到3%V₂O₅-6%MoO₃/TiO₂中,催化剂的脱硝效率明显提高,其中,3%V₂O₅-6%MoO₃-1%SnO₂/TiO₂催化剂表现出最佳的脱硝活性,在180 ℃具有良好的脱硝稳定性,在引入10%(体积分数)H₂O和0.03%(体积分数)SO₂后,表现出良好的抗SO₂/H₂O的性能。这主要是由于引入的金属元素以氧化物或钒酸盐形式存在,并与活性组分钒物种有很强的相互作用,抑制了TiO₂晶粒的长大,起到了细化TiO₂粒径的作用,增加了催化剂表面的弱酸性位点,同时,表面活性氧及还原态的V⁴⁺、Mo⁴⁺物种数量有了大幅提升,增大了催化剂的还原程度,有利于催化还原反应的进行。

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	吴彦霞
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	陈琛
	王献忠
	戴长友
	胡利明
	陈玉峰

关键词: 催化剂 V₂O₅-MoO₃/TiO₂ 掺杂脱硝效率

Abstract: Aseries of V-Mo/TiO₂ catalysts were prepared by impregnation method. The effects of vanadium content, molybdenum content and elemental (Ce, Co, La, Sn) doping on the denitrification activity of the catalyst were investigated. The physicochemical properties and structure of the catalyst were characterized by XRD, BET, H₂-TPR, NH₃-TPD and XPS. The results show that the optimum content of vanadium was 3% and the optimum content of molybdenum was 6%. When Ce, La, Co and Sn were doped into 3%V₂O₅-6%MoO₃/TiO₂, the denitration efficiency of the catalyst was obviously improved. Among them, 3%V₂O₅-6%MoO₃-1%SnO₂/TiO₂ catalyst showed the best denitrification activity and good denitration stability at 180 ℃. After introducing 10vol% H₂O and 0.03vol% SO₂, it exhibited good resistance to SO₂/H₂O. This is mainly because the introduced metal element exists in the form of oxide or vanadate, and has a strong interaction with the active component vanadium species, inhibiting the growth of TiO₂ crystal grains, and plays a role in refining the particle size of TiO₂. A weakly acidic site on the surface of the catalyst is added. At the same time, the number of surface active oxygen and reduced V⁴⁺ and Mo⁴⁺ species has been greatly improved, which enhances the degree of reduction of the catalyst and facilitates the catalytic reduction reaction.

Key words: catalyst V₂O₅-MoO₃/TiO₂ doping denitration efficiency

出版日期: 2021-03-25 发布日期: 2021-03-23

ZTFLH:

X701.3

基金资助: 国家重点研发计划(2016YFC0209302);国家自然科学基金(21866026)

通讯作者: yanxiawu1988@163.com

作者简介: 吴彦霞,2014年6月毕业于南京工业大学,获得工程硕士学位。于2014年8月至今在中国建筑材料科学研究总院工作,主要从事环保材料领域的研究。

引用本文:

吴彦霞, 梁海龙, 陈鑫, 陈琛, 王献忠, 戴长友, 胡利明, 陈玉峰. 元素(Ce、Co、La、Sn)掺杂对V-Mo/TiO₂催化剂脱硝活性的影响[J]. 材料导报, 2021, 35(6): 6020-6027.
WU Yanxia, LIANG Hailong, CHEN Xin, CHEN Chen, WANG Xianzhong, DAI Changyou, HU Liming, CHEN Yufeng. Effect of Element (Ce, Co, La, Sn) Doping on Denitration Activity of V-Mo/TiO₂ Catalysts. Materials Reports, 2021, 35(6): 6020-6027.

链接本文:

http://www.mater-rep.com/CN/10.11896/cldb.19100157 或 http://www.mater-rep.com/CN/Y2021/V35/I6/6020

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