Efficient removal of NOx from simulated marine exhaust by using O3-Na2SO3: Experimental factors and optimization analysis
Efficient removal of NOx from simulated marine exhaust by using O3-Na2SO3: Experimental factors and optimization analysis
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DOI：
10.1016/j.fuel.2021.122659
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发表时间：
2021-11
期刊：
影响因子：
7.4
通讯作者：
Zhao Zhang;Hongyuan Xi;Song Zhou;Weijian Zhou;Majed Shreka
中科院分区：
文献类型：
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作者：
Zhao Zhang;Hongyuan Xi;Song Zhou;Weijian Zhou;Majed Shreka
船舶柴油机排放的NOx对海洋环境和人类健康造成了极大的危害。采用O3-Na 2SO 3吸收体系对模拟船舶尾气中NOx的脱除进行了研究。讨论了Na 2SO 3浓度、初始pH值、温度和O3浓度对降解的影响。结果表明，随着Na 2SO 3和O3浓度的增加，NOx的去除率增加。但随着初始pH值的降低，NOx的去除率增加。此外，响应面法被用来估计的相关性的四个参数和它们对NOx去除效率的依赖性的影响。根据拟合的二次回归模型，分析相关项的显著性水平。通过响应面分析和二次回归模型分析了各实验参数和最佳工艺条件对NOx最大去除率的交互作用。模型预测的最大NOx去除率为99.08%，与实验结果吻合较好。
NOxfrom marine diesel engines does great damage to the ocean and to human health. In this study, the O3-Na2SO3absorption system was used to investigate NOxremoval from simulated marine exhaust gases. The independent effects of Na2SO3concentration, initial pH values, temperature, and O3concentration were thoroughly discussed. The results showed that increasing the Na2SO3and O3concentrations contributed to increasing NOxremoval efficiency. However, the NOxremoval efficiency increased with the decrease of the initial pH values. In addition, the response surface methodology was used to estimate the relevance of the four parameters and their dependent effects on NOxremoval efficiency. According to the fitted quadratic regression model, the significance levels of the related terms were analyzed. Moreover, the interactive effects of the experimental parameters and the optimal conditions on maximum NOxremoval efficiency were obtained by the response surfaces and the quadratic regression model. The maximum NOxremoval efficiency predicted by the model was 99.08% and the prediction showed excellent agreement with experimental results.