{"title":"Effects of a small amount of H2O on negative ion mobility and ion-molecule reactions in O2 at atmospheric pressure","authors":"Yui Okuyama, Yuka Yasuzawa, Hirotake Sugawara","doi":"10.1002/eej.23413","DOIUrl":null,"url":null,"abstract":"<p>In this study, we have measured the negative ion mobility in O<sub>2</sub> at high pressures with a little amount of H<sub>2</sub>O concentration between 15 and 17,000 ppb. After that, we carried out a Monte Carlo simulation using mobility of electrons, that of the ions obtained in the measurements, and rate coefficients of ion-molecule reactions. As a result, the mobility value 2.39 cm<sup>2</sup>/V·s of O<sub>4</sub>¯ is obtained in ultrahigh purity O<sub>2</sub> of which the H<sub>2</sub>O concentration is between 15 and 100 ppb. Moreover, the mobility decreases with the H<sub>2</sub>O concentrations at which the ion species are considered to be O<sub>2</sub>¯·(H<sub>2</sub>O)<i><sub>n</sub></i> (<i><sub>n</sub></i> = 1, 2, 3). Then, we compared the experimental result with that of the simulation and estimated the ion mobility and rate coefficients of ion molecule reactions. Simulation results using estimated values of the ion mobility and rate coefficients agree well with measurement results.</p>","PeriodicalId":50550,"journal":{"name":"Electrical Engineering in Japan","volume":"216 1","pages":""},"PeriodicalIF":0.4000,"publicationDate":"2023-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Electrical Engineering in Japan","FirstCategoryId":"5","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/eej.23413","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
In this study, we have measured the negative ion mobility in O2 at high pressures with a little amount of H2O concentration between 15 and 17,000 ppb. After that, we carried out a Monte Carlo simulation using mobility of electrons, that of the ions obtained in the measurements, and rate coefficients of ion-molecule reactions. As a result, the mobility value 2.39 cm2/V·s of O4¯ is obtained in ultrahigh purity O2 of which the H2O concentration is between 15 and 100 ppb. Moreover, the mobility decreases with the H2O concentrations at which the ion species are considered to be O2¯·(H2O)n (n = 1, 2, 3). Then, we compared the experimental result with that of the simulation and estimated the ion mobility and rate coefficients of ion molecule reactions. Simulation results using estimated values of the ion mobility and rate coefficients agree well with measurement results.
期刊介绍：
Electrical Engineering in Japan (EEJ) is an official journal of the Institute of Electrical Engineers of Japan (IEEJ). This authoritative journal is a translation of the Transactions of the Institute of Electrical Engineers of Japan. It publishes 16 issues a year on original research findings in Electrical Engineering with special focus on the science, technology and applications of electric power, such as power generation, transmission and conversion, electric railways (including magnetic levitation devices), motors, switching, power economics.
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