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摘要本实验将含乙醇废水和臭氧混合物经催化活化后注入模拟烟道内，提高了NOx的脱除率。实验制备了铈钛复合催化剂，考察了含乙醇废水中乙醇浓度、乙酸乙酯浓度、葡萄糖浓度、乙二胺浓度、乙酸浓度、pH值对脱硝活性的影响。乙醇浓度升高有利于脱硝活性的提高，当乙醇浓度达到5 v/v%时，NOx的脱除率比纯水高出25%；乙酸对脱硝活性的影响较小；乙酸乙酯、乙二胺以及葡萄糖均对脱硝活性具有促进作用；pH值的增加有利于脱硝活性的提高。产物的气相色谱数据表明，5%乙醇溶液在催化臭氧化反应后有47.5%的乙醇被分解；离子色谱数据表明，NOX被臭氧催化氧化为NO3-。反应活性物质氧化性测试表明含醇废水中的乙醇易与吸附在催化剂表面的臭氧作用生成自由基中间体，与烟气中的NOX作用，达到脱硝的目的。28085
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关键词 烟气脱硝 含醇废水 催化臭氧化
毕业论文设计说明书外文摘要
Title Studies on Mechanisms of Catalytic Ozonation for Low-temperature NOX Removal with Ethanol Waste Water
Abstract
Ethanol waste water from beer factory was introduced to the denitrification device to upgrade the NOX removal efficiency, at the same time degrading the ethanol. A novel Ce-Ti catalyst was applied in the NOX removal reaction. The concentration of ethanol, ethyl acetate, glucose, ethylenediamine, acetic acid in waste water and the pH of waste water were investigated on the effects on the NOX removal based on catalyst. The NOX removal increases with the enhancement of ethanol concentration. When adding 5wt% alcohol solution into the device, the removal of NOX increased by 25%. The acetic acid shows weak influence on the NOX removal. The ethyl ester, glucose and ethylenediamine all promote the NOX removal. The increase of pH is also beneficial for the enhancement of catalytic efficiencies. Gas chromatograph and iron chromatograph for reaction products were performed. Gas chromatograph showed that 45.7% alcohol degraded during the catalytic reaction when 5wt% ethanol solution was added into the system. Iron chromatogragh showed that all the NOX transferred into NO3- during the oxidation. From the analysis of experimental and characterization results, it can be obtained that the improvement of NOx removal is mainly caused by the intermediates from the reaction among O3, ethanol and catalysts.
Keywords denitrification ethanol wastewater catalytic ozonation
目 次
1 引言 3
1.1 大气污染物及危害 3
1.2 NOX的治理技术 5
1.3 有机废水污染及治理技术 6
1.4 含醇有机废水及处理技术 7
1.5 本课题的研究内容 8
2 实验部分 9
2.1 试剂 9
2.2 实验装置 9
2.3 催化剂制备 10
2.4 实验流程 10
2.5 NOX脱除率计算公式 11
3 结果与讨论 12
3.1 催化剂结构性能表征 12
3.1.1 XRD分析 12
3.1.2 傅里叶变换红外谱图 13
3.1.3 H2 TPR测试 14
3.1.4 NH3 TPD测试 15
3.2 乙醇对催化臭氧化NOX脱除率的影响 16
3.3 其他杂质对NOx脱除率的影响 17
3.3.1 乙酸对催化臭氧化NOX脱除率的影响 17
3.3.2 酯对NOx脱除率的影响 18
3.3.3 胺对NOx脱除率的影响 19
3.3.4 糖对NOx脱除率的影响 20