燃料化学学报（中英文）2023，Vol.51Issue(9)：1220-1231,12.DOI:10.1016/S1872-5813(23)60353-6
氧化硅添加剂对常压和加压条件下准东煤灰中钠和硫转化特性的影响
Effect of silicon oxide additive on the transformation characteristics of sodium and sulfur in Zhundong coal ash under atmospheric and elevated pressure
摘要
Abstract
The effects of silicon oxide additive on the transformation characteristics of sodium and sulfur in coal ash under atmospheric and elevated pressure were investigated in this study.The results indicated that silicon oxide additive significantly inhibited the release of sodium under high pressure.The sodium content in ash with 4%of silicon oxide additive was 3.5%at 0.1 MPa,which was higher than that without additive.However,the sodium content increased to 5.4%without additive and 6.9%with 4%additive at 4 MPa,respectively.The sodium mainly existed in the forms of NaAlSiO4 and NaAlSi3O8 at 0.1 MPa,and the content of NaAlSiO4 increased with increasing additive dosage,which weakened the agglomeration of ash.The decomposition of low melting point mineral CaSO4 was inhibited at 4 MPa,and the formation of Na6Ca2Al6Si6O24(SO4)2 from NaAlSiO4 and CaSO4 was promoted significantly with increasing additive dosage.Furthermore,the inhibition mechanism of sodium and sulfur released from coal ash by silicon oxide under high pressure was proposed.关键词
准东煤灰/加压/氧化硅添加剂/钠/硫Key words
Zhundong coal ash/elevated pressure/silicon oxide additive/sodium/sulfur分类
化学工程引用本文复制引用
肖伍扬,魏博,王建江,马金荣,买尔哈巴·阿不都热合曼,李显,姚洪,程泽宁..氧化硅添加剂对常压和加压条件下准东煤灰中钠和硫转化特性的影响[J].燃料化学学报（中英文）,2023,51(9):1220-1231,12.基金项目
The project was supported by the National Natural Science Foundation of China(51966017),Major Science and Technology Special Project of Xinjiang Uygur Autonomous Region(2022A01002-2),and the Foundation of State Key Laboratory of Coal Combustion(FSKLCCA2201). （51966017）
