钾修饰铁锆氧载体制备及煤化学链燃烧中钾元素赋存形态探究  

Exploration of potassium modification on iron-zirconium oxygen carriers and potassium element forms in coal chemical loop combustion

作　　者：魏国兴 刘涛[1,2] 宋方林 焦发存[1] WEI Guoxing;LIU Tao;SONG Fanglin;JIAO Facun(School of Chemical and Blasting Engineering,Anhui University of Science and Technology,Huainan 232001,China;Anhui Provincial Institute of Modern Coal Processing Technology,Anhui University of Science and Technology,Huainan 232001,China)

机构地区：[1]安徽理工大学化工与爆破学院,安徽淮南232001 [2]安徽理工大学安徽省现代煤炭加工技术研究院,安徽淮南232001

出　　处：《应用化工》2024年第10期2338-2344,共7页Applied Chemical Industry

基　　金：安徽省现代煤炭加工技术研究院开放基金重点项目(MTY202201);安徽省高等学校自然科学研究重点项目(KJ2021A0432)。

摘　　要：考察了制备条件对载氧体性能的影响,并通过HSC Chemistry考察了温度与还原度(R_(ox))对钾元素赋存形态的影响。结果表明,最佳制备条件为:ZrO_(2)的添加量为30%,K_(2)CO_(3)的添加量为5%,载氧体的煅烧温度为800℃。煤过量或较高时钾元素的赋存形态主要为气态钾单质K(g)。而在系统中载氧体含量足量或过量时,在高温时钾元素的主要赋存形态转变为了KFeO_(2)。并且只有在反应温度较低且载氧体还原程度较深时,钾元素才能保持以K_(2)CO_(3)的原形式存在。The effects of preparation conditions on the properties of oxygen carriers were investigated,and the effects of temperature and reduction degree(R_(ox))on the occurrence of potassium were investigated by HSC Chemistry.The results showed that the optimal preparation conditions were as follows:the addition of ZrO_(2) was 30%,the addition of K_(2)CO_(3)was 5%,and the calcination temperature of oxygen carrier was 800℃.In the case of coal excess,the occurrence form of potassium at high temperature is mainly gaseous potassium elemental K(g).When the oxygen carrier content in the system is sufficient or excessive,the main occurrence form of potassium changes to KFeO_(2)at high temperature.And only when the reaction temperature is low and the degree of oxygen carrier reduction is deep,can potassium remain in its original form of K_(2)CO_(3).

关 键 词：煤 载氧体 化学链燃烧 HSC Chemistry模拟 钾赋存形态 

分 类 号：TQ534[化学工程—煤化学工程]