%0 Journal Article
%T Study on kinetics and model of coke loss reaction with CO2 in blast furnace<br>焦炭溶损反应动力学及其模型研究
%A CUI Ping
%A ZHANG Lei
%A YANG Min
%A WANG Yang
%A <br>崔平
%A 张磊
%A 杨敏
%A 汪洋
%J 燃料化学学报
%D 2006
%I 
%X The kinetics of the reaction between coke and CO2 under the condition of blast furnace was studied by using the shrinking unreacted core model, and a relational expression of reaction kinetics was established with R, a determinable parameter. Reaction rate constant, effective diffusivity, apparent activation energy, effective diffusion activation energy and resistance in various steps of the reaction process were analyzed in this paper. The results show that the reaction of coke with CO2 is consonant with the shrinking unreacted core model, which has an apparent activation energy Eo = 124.5 kJ/mol, and an effective diffusion activation energy Eo = 642.4 kJ/ mol, With the increasing of reaction temperature, the resistance of surface chemical reaction increases, but the relative proportion of internal diffusion mass transfer resistance decreases in the residue ash layer, The coke reaction with CO2 is mainly controlled by the internal diffusion at lower temperatures, while with the increasing of reaction temperature, it is controlled by a combination of external diffusion, chemical reaction and internal diffusion. After a period of time at high temperatures the reaction turns to be controlled by the internal diffusion,
%K coke
%K loss reaction
%K kinetics
%K shrinking unreacted core model<br>焦炭
%K 溶损反应
%K 动力学
%K 未反应收缩核模型
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=6579068328FE643F&jid=C6AB115B41BD2F1616ECDB095B69B8ED&aid=A41D0C80AADFBA1D&yid=37904DC365DD7266&vid=339D79302DF62549&iid=38B194292C032A66&sid=5D8C08279A19B0D4&eid=03E56C113B4E5A88&journal_id=0253-2409&journal_name=燃料化学学报&referenced_num=0&reference_num=8