燃料化学学报2017，Vol.45Issue(3)：257-264,8.
准东煤热解过程中不同赋存形态钠变迁规律的研究
Release and transformation behaviors of sodium species with different occurrence modes during pyrolysis of Zhundong coal
摘要
Abstract
A series of pyrolysis experiments on Zhundong coal were conducted by using a pressurized tube reactor.Under different pyrolysis temperature, residence time and pressure, the release and transformation behaviors of sodium species with different occurrence modes were investigated by the method of sequential chemical extraction.The results indicate that sodium species are mainly in the form of hydrated ion and albite, and organic forms are quite less.At 500-700℃, water-soluble sodium would be combined with char matrix, forming hydrochloric acid-soluble but water-insoluble sodium.At 700-900℃, soluble sodium could react with minerals such as kaolin, forming insoluble aluminosilicate.At 1000℃, release of sodium became intense;part of kaolin might be involved into reactions with lime, which inhibited its reactions with soluble sodium.Besides, it is found that release and transformation behaviors of sodium mainly take place at the initial stage of pyrolysis along with release of volatiles and raising pressure has negligible influence on those behaviors.关键词
准东煤/热解/赋存形态/钠/变迁Key words
Zhundong coal/pyrolysis/occurrence mode/sodium/release and transformation分类
化学化工引用本文复制引用
郭帅,蒋云峰,熊青安,宋双双,赵建涛,房倚天..准东煤热解过程中不同赋存形态钠变迁规律的研究[J].燃料化学学报,2017,45(3):257-264,8.基金项目
国家自然科学基金(21576276, 21506241)和中国科学院战略性先导科技专项(XDA07050100)资助 The project was supported by the National Natural Science Foundation of China (21576276, 21506241) and Strategic Priority Research Program of the Chinese Academy of Sciences (XDA07050100). （21576276, 21506241）
