{"title":"Enhancement of removal of SO2 and NOx by powdery materials in radiation treatment of exhaust gases","authors":"Okihiro Tokunaga, Hideki Namba, Nobutake Suzuki","doi":"10.1016/0020-708X(85)90032-8","DOIUrl":null,"url":null,"abstract":"<div><p>We studied the effect of powdery silica on radiation removal of SO<sub>2</sub> and NOx from mixtures of SO<sub>2</sub>, NOx, water vapour, oxygen and nitrogen under irradiation by electron beams of 1.5 MeV at 120°C. The SO<sub>2</sub> and NOx concentrations decreased when powdery silica was fed without irradiation. Decrements of SO<sub>2</sub> and NOx concentrations were markedly enhanced when powdery silica was fed together with the irradiation. The enhancement of SO<sub>2</sub>- and NOx-removal is attributed to the adsorption of SO<sub>2</sub> and NO on the water-covered surface of powdery silica, and the effective removal of NO<sub>2</sub> due to the reaction with water adsorbed on the surface of powdery silica. The results obtained show that the addition of powdery silica under irradiation is an effective method of enhancing the removal of SO<sub>2</sub> and NOx.</p></div>","PeriodicalId":22517,"journal":{"name":"The International journal of applied radiation and isotopes","volume":"36 10","pages":"Pages 807-812"},"PeriodicalIF":0.0000,"publicationDate":"1985-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-708X(85)90032-8","citationCount":"21","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"The International journal of applied radiation and isotopes","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0020708X85900328","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 21
Abstract
We studied the effect of powdery silica on radiation removal of SO2 and NOx from mixtures of SO2, NOx, water vapour, oxygen and nitrogen under irradiation by electron beams of 1.5 MeV at 120°C. The SO2 and NOx concentrations decreased when powdery silica was fed without irradiation. Decrements of SO2 and NOx concentrations were markedly enhanced when powdery silica was fed together with the irradiation. The enhancement of SO2- and NOx-removal is attributed to the adsorption of SO2 and NO on the water-covered surface of powdery silica, and the effective removal of NO2 due to the reaction with water adsorbed on the surface of powdery silica. The results obtained show that the addition of powdery silica under irradiation is an effective method of enhancing the removal of SO2 and NOx.
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