Study on the formation of secondary fine particles produced from NO2 and SO2 gas mixture on single-component oxides and coal ash
- 주제(키워드) particulate matter , ion chromatography , SO2 , NO2 , secondary particles
- 발행기관 아주대학교
- 지도교수 Hyung-Taek Kim
- 발행년도 2019
- 학위수여년월 2019. 8
- 학위명 석사
- 학과 및 전공 일반대학원 에너지시스템학과
- 실제URI http://www.dcollection.net/handler/ajou/000000029038
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
Atmospheric particulate pollution has a serious impact on the ecological environment and human health. Studying the formation of particulate matter plays a vital role in controlling particulate matter and the formulation of relevant environmental policies. In this study, five kinds of single-component mineral oxides and three kinds of coal ash were used as research objects. The effects of time, humidity, light, gas concentration ratio and sea salt on the conversion of SO2 and NO2 on the surface of the particles were studied in a laboratory-made aerosol reactor by using ion chromatography (IC) detection technology and the law of the conversion of SO2 and NO2 on the particles was explored. Through experimental research, it was found that, a large amount of sulfate formed in the initial stage of the reaction, nitrate mainly formed in the middle and late stages of the reaction; high relative humidity (RH) and the addition of sea salt promotes the formation of sulfate on the particles; the gas concentration ratio affected the formation of sulfate and nitrate; ultraviolet (UV) light irradiation promoted the conversion of SO2 and NO2 on coal ash, but this promotion effect was not observed on alumina particles; the conversion efficiency of SO2 and NO2 on different particles was different.
more목차
Chapter 1. Introduction 1
1.1 Research background 1
1.1.1 Atmospheric particulate matter 1
1.1.2 Source of major pollutant emissions 3
1.1.3 The impact of particulate matter 5
1.1.4 Air pollution control 8
1.2 Research method 10
1.3 Research purposes and content 12
1.3.1 Research purpose 12
1.3.2 Research content 13
Chapter 2. Experimental materials and method 14
2.1 Experimental materials 14
2.2 Experimental method 15
2.3 Analysis method 17
Chapter 3. Experimental results and analysis 17
3.1 Heterogeneous reaction of NO2 and SO2 on single component particles 18
3.1.1 Differences in heterogeneous reactions of NO2 and SO2 on different oxides 18
3.1.2 Effect of time on the heterogeneous reaction of NO2 and SO2 on single component particulate 22
3.1.3 Effect of relative humidity on the heterogeneous reaction of NO2 and SO2 on single component particulate 24
3.1.4 Effect of illumination conditions on the heterogeneous reaction of NO2 and SO2 on single component particulate 28
3.1.5 Effect of SO2/NO2 concentration ratio on the heterogeneous reaction of NO2 and SO2 on single component particulate 32
3.2 Heterogeneous reaction of NO2 and SO2 on mixture particles 34
3.2.1 Differences in heterogeneous reactions of NO2 and SO2 on different mixture particles 34
3.2.2 Effect of time on the heterogeneous reaction of NO2 and SO2 on mixture particles 37
3.2.3 Effect of relative humidity on the heterogeneous reaction of NO2 and SO2 on mixture particles 39
3.2.4 Effect of illumination conditions on the heterogeneous reaction of NO2 and SO2 on mixture particles 42
3.2.5 Effect of SO2/NO2 concentration ratio on the heterogeneous reaction of NO2 and SO2 on mixture particles 44
3.3 Effect of sea salt on the heterogeneous reaction of NO2 and SO2 on particulate matter 46
3.3.1 Effect of sea salt on the heterogeneous reaction of NO2 and SO2 on single component particulate 47
3.3.2 Effect of sea salt on the heterogeneous reaction of NO2 and SO2 on mixture particles 50
Chapter 4. Conclusions 52
Reference 53
