J. Janowski, A. Barański, M. Łagan, J. Nedoma, A. Sadowski
{"title":"On the application of the crackling core model to the reduction of magnetite to wustite","authors":"J. Janowski, A. Barański, M. Łagan, J. Nedoma, A. Sadowski","doi":"10.1016/0168-7336(90)80012-9","DOIUrl":null,"url":null,"abstract":"<div><p>The reduction of magnetite to wustite Fe<sub>0.936</sub>O was studied by means of thermogravimetry at 1293 K. Sphere-like samples of constant radius, within the radius range 0.3–5.0 mm, were reduced by flowing a CO<sub>2</sub> + CO gas mixture at nearly atmospheric pressure. Sigmoidal-type kinetic curves were obtained.</p><p>The crackling core model proposed in 1975 by Park and Levenspiel fits the data. The model takes into account crackling of solid grains and a chemical reaction. The limits of applicability of the model are discussed in more detail and the original procedure for calculating its parameters was modified to some extent.</p></div>","PeriodicalId":101061,"journal":{"name":"Reactivity of Solids","volume":"8 1","pages":"Pages 103-114"},"PeriodicalIF":0.0000,"publicationDate":"1990-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0168-7336(90)80012-9","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Reactivity of Solids","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0168733690800129","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 3
Abstract
The reduction of magnetite to wustite Fe0.936O was studied by means of thermogravimetry at 1293 K. Sphere-like samples of constant radius, within the radius range 0.3–5.0 mm, were reduced by flowing a CO2 + CO gas mixture at nearly atmospheric pressure. Sigmoidal-type kinetic curves were obtained.
The crackling core model proposed in 1975 by Park and Levenspiel fits the data. The model takes into account crackling of solid grains and a chemical reaction. The limits of applicability of the model are discussed in more detail and the original procedure for calculating its parameters was modified to some extent.
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