中国电机工程学报Issue(z1)：130-135,6.DOI:10.13334/j.0258-8013.pcsee.2014.S.018
准东煤中碱金属的赋存形态及其在热解过程中的迁移规律
Occurrence of Alkali Metals in Zhundong Coal and Its Migration During Pyrolysis Process
摘要
Abstract
Method of three-step-extraction was used to research the existing form of alkali metals in Zhundong Coal. Coal samples were placed in the tube furnace which was in inert atmosphere to study the migration of alkali metals varying with temperature from 400 to 1000 ℃. Finally, the release forms of alkali metals from coal ash during pyrolysis process were simulated by Factsage. The results show that sodium in Zhundong coal exists mainly in the form of water soluble sodium, while potassium is in the form of organic potassium and insoluble potassium. The content of water soluble sodium in Zhundong coal descends obviously in the process of pyrolysis and the release rate is the fastest at the temperature between 400 to 800 ℃, While the concentration of water soluble potassium is stable. Replacement reaction will take place at high temperature. The results of experiment and FactSage indicate that, in the pyrolysis process, alkali metals are released mainly in the form of chloride.关键词
准东煤/碱金属/赋存/热解/迁移Key words
Zhundong coal/alkali metal/occurrence/pyrolysis/migration分类
能源科技引用本文复制引用
王智化,李谦,刘敬,黄镇宇,周志军,周俊虎,岑可法..准东煤中碱金属的赋存形态及其在热解过程中的迁移规律[J].中国电机工程学报,2014,(z1):130-135,6.基金项目
国家重点基础研究发展计划项目(973计划)(2012CB214906)。The National Basic Research Program (973 Program)(2012CB214906) （973计划）
