{"title":"Unveiling the synergism and reaction pathway of ethyl acetate removal in DBD/absorption integrated reactor","authors":"","doi":"10.1016/j.psep.2024.09.064","DOIUrl":null,"url":null,"abstract":"<div><div>The experiment employs dielectric barrier discharge (DBD) combined with absorption integrated reactor (DCA<sup>IR</sup>) for higher concentration ethyl acetate removal and studies the synergism of DCA<sup>IR</sup> technology and the reaction pathway of ethyl acetate. Among three technologies of DCA<sup>IR</sup>, DBD and DBD combined with absorption series reactor (DCA<sup>SR</sup>), DCA<sup>IR</sup> achieved the highest removal efficiency (RE) of ethyl acetate at similar input power. Fixed gas flow rate of 1000 ml/min and <span><math><msubsup><mrow><mi>c</mi></mrow><mrow><msub><mrow><mi>C</mi></mrow><mrow><mn>4</mn></mrow></msub><msub><mrow><mi>H</mi></mrow><mrow><mn>8</mn></mrow></msub><msub><mrow><mi>O</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow><mrow><mi>in</mi></mrow></msubsup></math></span> of 5000 mg/m<sup>3</sup>, the average REs of DCA<sup>SR</sup> and DCA<sup>IR</sup> are higher than that of DBD by 31.2 % and 34.2 %, respectively. For the efficiency compensation mechanism, one of synergies in DCA<sup>IR</sup>, RE of ethyl acetate could exceed 80 % at the input power of 15 W. Energy consumption evaluation shows when RE > 80 %, the max energy efficiency of three technologies is in the order 70.0 g/kWh (DCA<sup>IR</sup>) > 5.1 g/kWh (DCA<sup>SR</sup>) > 3.0 g/kWh (DBD). Tail gas and absorbent analysis reveals DCA<sup>IR</sup> can enhance mineralizing ethyl acetate and eliminating the secondary pollutants (e.g., O<sub>3</sub>, gaseous organic intermediates, and COD, etc.) effectively, due to its special structure of reactor. According to FT-IR spectra, the degradation mechanism and reaction pathway of ethyl acetate in DCA<sup>IR</sup> has been unveiled.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":null,"pages":null},"PeriodicalIF":6.9000,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Process Safety and Environmental Protection","FirstCategoryId":"93","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0957582024012047","RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The experiment employs dielectric barrier discharge (DBD) combined with absorption integrated reactor (DCAIR) for higher concentration ethyl acetate removal and studies the synergism of DCAIR technology and the reaction pathway of ethyl acetate. Among three technologies of DCAIR, DBD and DBD combined with absorption series reactor (DCASR), DCAIR achieved the highest removal efficiency (RE) of ethyl acetate at similar input power. Fixed gas flow rate of 1000 ml/min and of 5000 mg/m3, the average REs of DCASR and DCAIR are higher than that of DBD by 31.2 % and 34.2 %, respectively. For the efficiency compensation mechanism, one of synergies in DCAIR, RE of ethyl acetate could exceed 80 % at the input power of 15 W. Energy consumption evaluation shows when RE > 80 %, the max energy efficiency of three technologies is in the order 70.0 g/kWh (DCAIR) > 5.1 g/kWh (DCASR) > 3.0 g/kWh (DBD). Tail gas and absorbent analysis reveals DCAIR can enhance mineralizing ethyl acetate and eliminating the secondary pollutants (e.g., O3, gaseous organic intermediates, and COD, etc.) effectively, due to its special structure of reactor. According to FT-IR spectra, the degradation mechanism and reaction pathway of ethyl acetate in DCAIR has been unveiled.
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