燃料化学学报2017，Vol.45Issue(3)：265-271,7.
无烟煤中碘燃烧释放和转化行为研究
Study on release and transformation of iodine from anthracite during combustion
摘要
Abstract
Modes of iodine occurrence in 4 Chinese anthracites and the combustion residues obtained at each temperature were extracted with sequential chemical extraction.The coal combustion was simulated with a tube furnace, the effects and mechanisms of heating temperature, heating time, O2 flow rate and water vapor on iodine release and transformation behavior during anthracite combustion were investigated.The results showed iodine in anthracites can present typically in three main modes of occurrence: organic matter-bound, Fe-Mn oxide-bound and water-soluble form.Temperature had a pronounced effect on iodine release and transformation.Iodine release increased with the increase of temperature, and 500-900℃ was a main stage for iodine release.Before 700℃, some forms of iodine which include water-soluble, ion-exchangeable and organic matter-bound iodine can be almost emitted completely and partly transformed into the carbonate-bound, Fe-Mn oxide-bound and residue-bound iodine.The Fe-Mn oxide-bound iodine may be mainly emitted in 700-900℃, and the residue-bound iodine was emitted partly before 1100℃.Moreover, the iodine release from anthracite increased with the increase of heating time and O2 flow rate, and water vapor can obviously promote the iodine release.93.8%-95.9% of iodine may be emitted in the form of HI and I2 at the given experimental condition of 1100℃, water vapor access, O2 flow rate of 120mL/min and combustion time of 20min.关键词
无烟煤/燃烧/碘/赋存形态/释放/转化Key words
anthracite/combustion/iodine/modes of occurrence/release/transformation分类
资源环境引用本文复制引用
彭炳先,吴代赦,周爱红..无烟煤中碘燃烧释放和转化行为研究[J].燃料化学学报,2017,45(3):265-271,7.基金项目
江西省自然科学基金(20142BAB203020)和江西省科技计划项目(20141BBG70008)资助 The project was supported by the Natural Science Foundation of Jiangxi Province in China (20142BAB203020) and Scientific and Technological Plan Project of Jiangxi Province in China (20141BBG70008). （20142BAB203020）
