介孔HPW-TiO2催化剂用于水泥窑协同处理MSS氧化脱硫
作者:
作者单位:

1.同济大学 先进土木工程材料教育部重点实验室,上海 201804;2.同济大学 材料科学与工程学院,上海 201804;3.宁波工程学院 建筑与交通工程学院,浙江 宁波 315012

作者简介:

秦西凤(1997—),女,湖北荆州人,同济大学硕士生.E-mail:2132865@tongji.edu.cn

通讯作者:

李好新(1978—),男,甘肃肃宁人,同济大学研究员,博士生导师,博士.E-mail:lhx10034@tongji.edu.cn

中图分类号:

X703;TQ426

基金项目:

国家自然科学基金资助项目(51578412,51878479,52078372,52108239)


Mesoporous PHW-TiO2 Catalyst Application in Oxidative Desulfurization during Co-processing of MSS in Cement Kiln
Author:
Affiliation:

1.Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University, Shanghai 201804, China;2.School of Materials Science and Engineering, Tongji University, Shanghai 201804, China;3.College of Architecture and Transportation Engineering, Ningbo University of Technology, Ningbo 315012, China

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    摘要:

    复杂含硫物的逸出是水泥窑协同处理城市生活污水污泥(MSS)技术中亟待解决的难题.采用聚合物导向自组装法及浸渍法制备负载磷钨酸(HPW)的介孔二氧化钛(TiO2)催化剂(简称介孔HPW-TiO2催化剂),并对含硫物的催化效果进行表征.结果表明:相较浸渍法,采用聚合物导向自组装法可获得更大比表面积和更多酸性位点的介孔HPW-TiO2催化剂;在水泥预热窑温度(200、260、320 ℃)下,采用聚合物导向自组装法合成的催化剂表现出更加高效的催化性能,能够有效加速MSS中的芳香族-S及脂肪族-S有机含硫物氧化转化为亚砜和砜.

    Abstract:

    Pollution of complex sulfur compounds is a pressing issue in the technology of co-processing municipal sewage sludge (MSS) in cement kilns. Mesoporous titanium dioxide (TiO2) catalysts loaded with phosphotungstic acid (HPW), referred to as mesoporous HPW-TiO2 catalysts, were prepared using polymer-directed self-assembly and impregnation methods, and their catalytic effects on sulfur compounds were characterized. The results indicate that, compared to the impregnation method, the polymer-directed self-assembly approach yields mesoporous HPW-TiO2 catalysts with larger specific surface areas and more acidic sites. At cement kiln preheater temperatures (200, 260, 320 ℃), the catalysts synthesized via the polymer-directed self-assembly method exhibit more efficient catalytic performance, effectively accelerating the oxidation conversion of aromatic-S and aliphatic-S organosulfur compounds in MSS into sulfoxides and sulfones.

    图1 HPW及3种催化剂样品的XRD图谱Fig.1 XRD patterns of HPW and three kinds of catalyst samples
    图2 20%HPW-TiO2样品的微观形貌Fig.2 Microscopic morphology of 20%HPW-TiO2 sample
    图3 介孔TiO2、20%HPW-TiO2和20%HPW-TiO2-DP样品的氮气吸附/脱附结果Fig.3 N2 adsorption/desorption results of mesoporous TiO2,20%HPW-TiO2 and 20%HPW-TiO2-DP samples
    图4 介孔TiO2、20%HPW-TiO2和20%HPW-TiO2-DP样品的酸性位点总量Fig.4 Total amount of acidic site of mesoporous TiO2,20%HPW-TiO2 and 20%HPW-TiO2-DP samples
    图5 煅烧200 ℃后掺/未掺介孔HPW-TiO2催化剂的MSS中含硫物的含量及S2p谱线Fig.5 Contents of sulfur-containing materials in MSS and S2p spectral lines with/without mesoporous HPW-TiO2 catalysts after 200 ℃ calcination
    图6 煅烧 260 ℃后掺/未掺介孔HPW-TiO2催化剂的MSS中含硫物的含量及S2p谱线Fig.6 Contents of sulfur-containing materials in MSS and S2p spectral lines with/without mesoporous HPW-TiO2 catalysts after 260 ℃ calcination
    图7 煅烧320 ℃后掺/未掺介孔HPW-TiO2催化剂的MSS中含硫物的含量及S2p谱线Fig.7 Contents of sulfur-containing materials in MSS and S2p spectral lines with/without mesoporous HPW-TiO2 catalysts after 320 ℃ calcination
    表 1 3种催化剂样品的结构参数Table 1 Structure parameters of three kinds of catalyst samples
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秦西凤,郭君渊,温小栋,陈雪婷,李好新.介孔HPW-TiO2催化剂用于水泥窑协同处理MSS氧化脱硫[J].建筑材料学报,2025,28(2):160-167

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  • 收稿日期:2024-02-19
  • 最后修改日期:2024-03-29
  • 在线发布日期: 2025-03-11
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