催化脱硝滤芯/滤袋的制备及其脱硝除尘一体化性能研究

发布时间：2021-06-16 19:45

　　当前烟气脱硝除尘净化技术主要分别在脱硝单元和除尘单元完成:脱硝过程主要包括基于V-W-Ti催化体系的选择性催化还原（SCR）以及选择性非催化还原技术（SNCR）;除尘过程则包括湿法除尘、电除尘、过滤除尘等多种工艺技术。脱硝与除尘单元的独立运行不仅增加占地空间,还显著提升设备投资和运行成本。因此,如何将烟气脱硝除尘一体化,缩短工艺流程,降低工艺成本,是当前烟气脱硝除尘净化领域发展的一个重要方向。当前的研究主要集中于脱硝除尘工艺耦合与优化以降低工程和操作成本,但是由于当前脱硝与除尘工艺的相对独立性,如何在同一单元实现燃烧烟气脱硝除尘净化依然是该领域面临的重大挑战。催化滤芯或催化滤袋,可实现脱硝与除尘单元在同一操作单元内完成,可显著降低烟气脱硝除尘的工艺和运行成本,并成为当前烟气净化领域的一个新兴热点方向。针对中高温烟气净化,本文首先研发了可同时去除NOx和灰尘的V-W-Mo-Ti催化滤芯,并在实验室和中试现场进行测试。研究了催化剂浆料,催化剂负载量和空速,以进一步优化催化滤芯以获得更好的SCR活性和工业实用性。此外,在实验室条件下研究了粉尘对催化活性和压降的影响,作为中试应用的数据支持。2... 

【文章来源】：中国科学院大学(中国科学院过程工程研究所)北京市

【文章页数】：82 页

【学位级别】：硕士

【文章目录】：
摘要
Abstract
1 Introduction
    1.1 Introduction
    1.2 Literature Review
        1.2.1 Health and Environmental effects of Nitrogen Oxides
        1.2.2 NO_x Sources
        1.2.3 NO_x emission and regulations for thermal plants in China
        1.2.4 NO_x emission control technologies
        1.2.5 Selective Catalytic Reduction with Ammonia (NH_3-SCR)
        1.2.6 The Process of NH_3-SCR
        1.2.7 Chemistry of NH_3-SCR
        1.2.8 Catalyst of NH_3-SCR
        1.2.9 NH_3-SCR Catalyst Supports
    1.3 The catalytic filter/bag
        1.3.1 The catalytic filter
        1.3.2 The catalytic bag
    1.4 Objectives and Significance
    1.5 Outline of the Thesis
2 Material and Methodology
    2.1 Catalyst Preparation
        2.1.1 Catalyst and catalytic filter preparation
        2.1.2 DeNO_x Calculation Efficiency
    2.2 Experimental Setup
    2.3 Characterization Technique
        2.3.1 The Elemental Analysis
3 The Lab and Pilot Application of V-W-Mo-Ti Catalytic Filter toSimultaneously Remove NOx And Dust for High Temperature Flue Gas
    3.1 Introduction
    3.2 Experimental Section
        3.2.1 Catalyst and Catalytic Filters preparation
        3.2.2 Performance Test
    3.3 Results and Discussions
        3.3.1 Composition and structure of powdery catalyst
        3.3.2 Structure and morphology of catalytic filter
        3.3.3 Main characteristics of glass ash
    3.4 Laboratory Tests
        3.4.1 The effect of particle size of catalytic slurry
        3.4.2 The effect of catalyst loading
        3.4.3 The effect of space velocity
        3.4.4 Simultaneous removal efficiency of NO and glass ash
    3.5 Pilot Test
    3.6 Conclusion
4 Simultaneous Removal of Particulates and NO by the Catalytic Bag Filtercontaining V_2O_5-MoO_3/TiO_2 Based Catalyst in the Temperature Range of200-250℃
    4.1 Introduction
    4.2 Experimental Section
        4.2.1 Catalyst and catalytic fabric filter preparation
        4.2.2 Performance tests
    4.3 Results and Discussion
        4.3.1 The features of the powder catalysts for coating
        4.3.2 Characterization of V_(10)Mo_(10) catalyst sample
        4.3.3 The Catalytic Performance of Catalytic Fiber Filter On Different Conditions
    4.4 The structure and dust removal performance of catalytic filter
    4.5 Conclusion
5 Conclusions
    5.1 Innovation
    5.2 Further Research Recommendations
References
Acknowledgement
Resume
List of Publications


【参考文献】：
期刊论文
[1]Selective catalytic reduction of NO by NH3 on cerium modified faujasite zeolite prepared from aluminum scraps and industrial metasilicate[J]. Rahma Abid,Gerard Delahay,Hassib Tounsi.  Journal of Rare Earths. 2020(03)
[2]NH3-SCR performance and the resistance to SO2 for Nb doped vanadium based catalyst at low temperatures[J]. Lin Zhu,Zhaoping Zhong,Jianming Xue,Yueyang Xu,Chunhua Wang,Lixia Wang.  Journal of Environmental Sciences. 2018(03)
[3]典型陶瓷基体对催化滤芯中催化剂分散及脱硝活性的影响[J]. 于超,李长明,张喻升,郭凤,余剑,杨运泉,许光文.  化工学报. 2018(02)
[4]Chinese Journal of CHEMICAL ENGINEERING[J].   Chinese Journal of Chemical Engineering. 2017(11)
[5]Vanadium oxide nanotubes for selective catalytic reduction of NOx with NH3[J]. Seyed Mahdi Mousavi.  Chinese Journal of Chemical Engineering. 2016(07)
[6]一种新型高比表面积TiO2载体在NH3选择性催化还原反应中对V2O5分散性的促进作用（英文）[J]. 刘欣,李俊华,李想,彭悦,王虎,江晓明,王兰武.  催化学报. 2016(06)



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