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首页> 外文期刊>Journal of Hazardous Materials >Photocatalytic NO_x abatement: Mathematical modeling, CFD validation and reactor analysis
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Photocatalytic NO_x abatement: Mathematical modeling, CFD validation and reactor analysis

机译：光催化NO_x减排：数学建模，CFD验证和反应器分析

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摘要

A 2D CFD model was implemented for the numerical simulation of NOx abatement in a photocatalytic reactor, considering the effect of relative humidity (10-60%), light intensity (0.3-13 W.m-(2)) and inlet NO concentration (0.1-1.0 ppm). Significant differences of NOx concentration at the catalytic surface and bulk gas were found (Delta(max) of similar to 12% and similar to 16% for NO and NO2, respectively) and corrections were proposed to achieve intrinsic rate laws from a model available in the literature. An analysis of the reactor performance was conducted and a nonlinear behavior was observed when the channel height (H) was varied. A point of maximum for the integral rate of NO and NO2 consumption as a function of H was found (Delta(NO) of similar to 2% and similar to-1% for H - 2H - 4H; Delta(NO2) of similar to 46% and -8.5% for H - 2H - 4H). Additionally, the NO conversion decreased from- 29% to 7% and the selectivity decreased from similar to 85% to similar to 80% (passing through a point of minimum at 2H) when the height was varied in the range H-4H. When comparing the results from the CFD simulations and the predictions of a plug flow model, deviations for NO conversion and selectivity increased with H (Delta(max) of similar to 2% and similar to 45%, respectively).
机译：考虑到相对湿度（10-60％），光强度（0.3-13 Wm-（2））和进口NO浓度（0.1-）的影响，实现了二维CFD模型用于光催化反应器中NOx减排的数值模拟。 1.0 ppm）。发现在催化表面和散装气体中的NOx浓度存在显着差异（对于NO和NO2，Delta（max）分别接近12％和接近16％），并提出了修正方法，以从可利用的模型中获得内在速率定律。文献。进行了反应器性能分析，当通道高度（H）变化时，观察到非线性行为。发现了NO和NO2消耗的积分率与H的函数关系的最大值（H-> 2H-> 4H的Delta（NO）接近2％，接近-1％; Delta的NO（NO2）接近H对于H-> 2H-> 4H，与46％和-8.5％相似）。另外，当高度在H-4H范围内变化时，NO转化率从29％降低至7％，选择性从相似的85％降低至相似的80％（通过2H的最小值）。当比较CFD仿真结果和塞流模型的预测结果时，NO转化率和选择性的偏差随H值的增加而增加（Delta（max）分别约为2％和45％）。

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  • 来源
    《Journal of Hazardous Materials》 |2019年第15期|145-153|共9页
  • 作者

    Lira Jessica de O. B.; Padoin Natan; Vilar Vitor J. P.; Soares Cintia;

  • 作者单位

    Univ Fed Santa Catarina, Dept Chem & Food Engn, Lab Mat & Corros LABMAC, Campus Univ Reitor Joao David Ferreira Lima, BR-88040900 Florianopolis, SC, Brazil;

    Univ Fed Santa Catarina, Dept Chem & Food Engn, Lab Mat & Corros LABMAC, Campus Univ Reitor Joao David Ferreira Lima, BR-88040900 Florianopolis, SC, Brazil;

    Univ Porto, Fac Engn, Chem Engn Dept, LSRE,LCM, Rua Dr Roberto Friers, P-4200465 Porto, Portugal;

    Univ Fed Santa Catarina, Dept Chem & Food Engn, Lab Mat & Corros LABMAC, Campus Univ Reitor Joao David Ferreira Lima, BR-88040900 Florianopolis, SC, Brazil;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    CFD; NOx; Photocatalysis; Validation; Reactor analysis;

    机译：CFD;NOx;光催化;验证;反应器分析;

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