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首页> 美国卫生研究院文献>Royal Society Open Science >Experiment and simulation study of the effect of ethanol and compound additives on the urea-based selective non-catalytic reduction process under moderate temperature conditions
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Experiment and simulation study of the effect of ethanol and compound additives on the urea-based selective non-catalytic reduction process under moderate temperature conditions

机译：适度温度条件下乙醇和复合添加剂对尿素基选择性非催化还原过程影响的实验与模拟研究

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An experiment and simulation study of the effect of using liquid additives on the selective non-catalytic reduction (SNCR) process is presented, providing a novel way for plants reducing NOX emissions. An experimental study is conducted in an entrained flow reactor, and CHEMKIN is applied for simulation study. Ethanol additive can effectively shift the temperature window of the NOXOUT process to a lower range and the NOXOUT efficiency ranges from 29 to 56% at 700–800°C. Furthermore, ethanol additive has a significant inhibitory effect on ammonia slip. Na2SO4 and C2H5OH can be combined into a compound additive, which has a synergistic effect on NO reduction. The addition of methanol can greatly promote denitrification efficiency from 650°C to 725°C, indicating the potential of compound additives in NO reduction. The HNCO + OH = H2O + NCO pathway is also proven to be enhanced for ethanol decomposition, thereby providing OH•, which is active in NO reduction. Finally, the reaction routes for ethanol on the urea-based SNCR process at the proper temperature are proposed.
机译：提出了使用液体添加剂对选择性非催化还原（SNCR）过程影响的实验和模拟研究，为植物减少NOx排放提供了一种新的途径。在气流床反应器中进行了实验研究，CHEMKIN被用于模拟研究。乙醇添加剂可以有效地将NOXOUT工艺的温度范围移至较低的范围，并且在700–800°C下，NOXOUT的效率范围为29％至56％。此外，乙醇添加剂对氨泄漏具有显着的抑制作用。 Na 2 SO 4和C 2 H 5 OH可以组合成化合物添加剂，这对NO的还原具有协同作用。从650°C到725°C添加甲醇可以大大提高反硝化效率，表明化合物添加剂具有降低NO的潜力。还证明了HNCO + OH = H2O + NCO途径可增强乙醇分解，从而提供可在NO还原中起作用的OH•。最后，提出了在适当温度下，基于尿素的SNCR工艺中乙醇的反应路线。

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