论文总字数：29507字

摘 要

近年来我国经济水平得到了极大提高，能源消耗需求逐步增加，大量的污染有毒气体或固体颗粒物被排放。愈发严重的空气污染现象正在逐步成为制约我国可持续发展战略的重要因素。同时随着火电行业的不断发展，NO_X的排放量不断增多。可以预见，电厂燃煤锅炉的污染排放标准将愈发严格，这必将促进烟气处理技术的提高，也将促进相关研究人员开发出新型高效的烟气净化技术。

本论文制备出了一种具有较高耐硫性和耐水性的低温脱硝协同脱汞复合催化滤料。对制备的复合催化滤料进行SEM、EDX、BET、XRD、NO-TPD、NH₃-TPD、CO₂-TPD、TG等表征方法分析其表面的物化结构，并对其作用机理进行研究。对制备的复合催化滤料进行了脱硝协同汞氧化性能的探究，研究了反应温度、SO₂、O₂、NO、氨氮比和负载量对复合催化滤料脱硝协同脱汞性能的影响。得出在170℃时滤料脱硝效率和脱汞效率能达到84.6%和93.2%，在负载量为0.9时滤料脱硝效率和脱汞效率能达到83.1%和93.4%。SO₂抑制复合催化滤料的脱硝性能但却促进其脱汞性能。复合催化滤料在6%的氧气浓度下达到了99%的脱汞效率。NO在一定范围内会略微促进复合催化滤料的脱汞性能，但是较高的氨氮比却会抑制其脱汞性能。

关键词：SCR，复合催化滤料，原位生成法，脱硝联合脱汞，Mn-Ce-Fe-Co/PPS

Abstract

In recent years, China's economic level has been greatly improved. The demand for energy consumption has gradually increased. And a large number of toxic gases or solid particulates have been discharged. More and more serious air pollution is gradually becoming an important factor restricting the sustainable development strategy of our country. At the same time, with the continuous development of thermal power industry, the emission of NOX is increasing. It can be predicted that the emission standards of coal-fired boilers in power plants will be more stringent, which will certainly promote the improvement of flue gas treatment technology and promote relevant researchers to develop new and efficient flue gas purification technology.

In this paper, a low temperature denitrification combined with mercury removal catalytic filter material with high sulfur resistance and water resistance was prepared. The physicochemical structure of the composite catalytic filter material and its mechanism was characterized by SEM, EDX, BET, XRD, NO-TPD, NH₃-TPD, CO₂-TPD and TG. The effects of reaction temperature, SO₂, O₂, NO, ammonia-nitrogen ratio and loading on the performance of the composite catalytic filter were studied. The denitrification efficiency and mercury removal efficiency of filter material can reach 84.6% and 93.2% at 170 C, and 83.1% and 93.4% at load of 0.9. SO₂ inhibited the denitrification performance of the composite catalytic filter, but promoted its mercury oxidation performance. The mercury removal efficiency of composite catalytic filter media reached 99% at 6% oxygen concentration. NO can slightly promote the mercury removal performance of the composite catalytic filter material in a certain range, but the higher ammonia-nitrogen ratio will inhibit its mercury removal performance.

KEY WORDS：SCR，Composite filter，In-situ generation，Denitrification combined with mercury removal，Mn-Ce-Fe-Co/PPS

目 录

摘要 ………………………………………………………………………………………Ⅰ

Abstract ………………………………………………………………………………………Ⅱ

第一章 绪论 1

1.1 课题研究背景 1

1.2 氮氧化物的危害及控制技术 1

1.2.1 氮氧化物的危害 1

1.2.2 氮氧化物控制技术 2

1.2.3 选择性催化还原（SCR）法 2

1.2.4 选择性非催化还原（SNCR）法 2

1.3 SCR脱硝联合脱汞技术 2

第二章 实验试剂与实验装置 3

2.1 实验试剂 3

2.2 实验气体 3

2.3 实验仪器 4

2.3.1便携式测汞仪 4

2.3.2 烟气分析仪 4

2.3.3 电子天平 5

2.4 固定床实验装置 6

第三章 催化剂的制备 7

3.1 引言 7

3.2 活性组分 7

3.3 负载载体 8

3.4 制备工艺 9

3.5 制备流程 10

3.5.1 复合催化滤料第一种制备方案 10

3.5.2 复合催化滤料第二种制备方案 12

3.6本章小结 13

第四章 复合催化滤料的表征分析 15

4.1 扫描电镜（SEM）分析 15

4.2 X-射线能谱（EDX）分析 16

4.3 比表面积（BET）分析 17

4.4 X-射线衍射(XRD)分析 18

4.5 程序升温脱附（TPD） 19

4.5.1 NO-TPD 19

4.5.2 NH₃-TPD 20

4.5.3 CO₂-TPD 20

4.6 热重分析（TG） 21

4.7 本章小结 22

第五章 复合催化滤料性能探究 23

5.1 引言 23

5.2 复合催化滤料脱硝性能的探究 23

5.2.1 S0₂的影响 23

5.2.2 O₂的影响 24

5.3 复合催化滤料脱汞性能的探究 24

5.3.1 S0₂的影响 24

5.3.2 O₂的影响 25

5.3.3 NO的影响 26

5.3.4 氨氮比的影响 27

5.4 复合催化滤料脱硝联合脱汞性能的探究 28

5.4.1 反应温度的影响 28

5.4.2 负载量的影响 29

5.5 本章小结 30

第六章 总结 32

参考文献（References） 34

致 谢 36

• 1. 绪论

1.1 课题研究背景

空气污染是一种由于人类生产、生活活动或自然界自然排放活动而引起能够对人类或自然环境等造成重大影响或危害的各种污染物增加的现象。随着社会经济的迅猛发展和能源燃料的快速消耗，空气污染现象愈发引起社会公众的广泛关注，并且逐步成为各个发展阶段国家终将面临的问题。

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