使用O3/H2,O2和O3/UV过程从烟气中去除NO和SO2的实验研究
Parveen Dalal1, Sridhar Dalai1, Snigdha Khuntia1
1School of Engineering and Applied Science, Ahmedabad University, Ahmedabad, India.
Environmental technology
|September 7, 2023
概括
本研究将臭氧/紫外线和H2O2/紫外线湿处理方法进行比较,以同时去除二氧化硫 (SO2) 和氧化 (NOx). 对于这两种污染物,H2O2/UV工艺证明了更高的去除效率.
科学领域:
- 环境化学环境化学
- 控制空气污染控制空气污染
- 先进的氧化过程 先进的氧化过程
背景情况:
- 烟气处理对于减少工业二氧化硫 (SO2) 和氧化 (NOx) 排放至关重要.
- 同时去除SO2和NOx是具有挑战性的,需要高效和具有成本效益的技术.
- 使用紫外线光与臭氧 (O3) 和过氧化 (H2O2) 等氧化剂的先进氧化工艺 (AOP) 显示出对污染物降解的希望.
研究的目的:
- 为了比较研究臭氧/紫外线和H2O2/紫外线湿工艺的有效性,同时去除SO2和NOx.
- 确定最佳的操作参数 (pH,温度,紫外线强度) 以最大限度地提高烟气清除效率.
- 评估和比较两种AOP的能源消耗 (EOE) 以实现高污染物去除率.
主要方法:
- 两种不同的湿工艺,臭氧/紫外线和H2O2/紫外线,用于同时去除SO2和NOx.
- 通过各种参数进行实验,例如紫外线强度,溶液pH值,温度和烟气流量.
- 基的产生是两种AOP的核心作用,UV光与O3和H2O2.2的结合促进了这种作用.
主要成果:
- 臭氧/紫外线过程在250W紫外线强度和308K时实现了92%的NOx和95%的SO2去除.
- 该H2O2/UV工艺表现出卓越的性能,在250W紫外线强度和313K时达到95%的NOx和100%的SO2去除.
- 两种工艺均表现出能量消耗 (EOE) 值小于1以实现95%的同时NOx/SO2去除效率.
结论:
- 在研究条件下,H2O2/UV潮湿工艺比臭氧/UV工艺更有效地同时去除SO2和NOx.
- 优化的参数,包括紫外线强度和温度,在两个AOP中显著影响污染物去除效率.
- 调查的两种AOP均为工业烟气处理提供了潜在的能源效率高的方法.
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