不同配比碱金属化合物对焦炭反应性的影响  

Influence of alkali metal compounds with different proportioning ratios on CRI

作　　者：苏步新[1] 张建良[1] 王丹[1] 王广伟[1] 毛瑞[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《燃料与化工》2011年第6期16-19,共4页Fuel & Chemical Processes

基　　金：国家科技支撑计划项目资助项目(2008BAB32B05)

摘　　要：通过将一定粒度焦炭浸入不同配比碱金属化合物(K2CO3+Na2CO3)溶液的方法在实验室制得焦样,用热重天平对焦样进行了焦炭反应性实验及SEM扫描电镜和能谱分析。研究结果表明,不同配比碱金属K、Na复合催化剂催化效果不同,K2CO3对焦炭溶损反应的催化作用贡献较大,焦炭溶损反应主要催化作用时间为前10min,浸碱焦炭试样中K、Na含量随碱溶液中K、Na含量增加而增加。Coke sample is made by the method in which the coke with a certain grain size is immersed in the solution of alkali metal compounds （K2CO3＋Na2CO3） with different proportioning ratios. The CRI experiment is carried out for coke sample by the use of thermogravimetric balance, and analysis is done by SEM and energy spectrum. The result of the study shows that the-composite catalysts of alkali metals K and Na with different proportioning rates have different catalysis results. K2CO3 has a greater contribution to the catalysis of the reaction of loss by solution of coke. The main catalysis time of the reaction of loss by solution of coke is the first 10 minutes. The K and Na contents in coke sample immersed in alkali metal solution are increased with the increase of K and Na contents in alkali solution.

关 键 词：碱金属 配比 催化剂 焦炭反应性 

分 类 号：TQ522[化学工程—煤化学工程]