化工学报2017，Vol.68Issue(8)：3291-3300,10.DOI:10.11949/j.issn.0438-1157.20161821
酸洗脱灰对准东次烟煤结构和反应活性的影响
Effects of demineralization methods on structure and reactivity of Zhundong subbituminous coal
摘要
Abstract
It is critical for clean and efficient utilization to study the effects of the demineralization process on the chemical structure and reactivity of coals. In the study, Zhundong raw coal was processed using HCl-HF-HCl and HF-HNO3-HCl methods. The structures of both the raw coal and demineralized-coal were characterized by FT-IR, and their reactivities were analyzed by using a micro fluidized bed multistage gas-solid reaction analyzer. The results show that acid treatment is able to reduce the ash content of coal to the level under 0.2%. The intensity of absorption peaks near OH and COOH in demineralized coal was significantly enhanced. The aliphatic side chains and the substituent on aromatic ring became shorter. A huge amount of silicon and aluminum minerals were removed by the HF treatment process. HNO3 can react with organic matter in coal which leads to further increase in the content of oxygen functional groups. The combustion reactivity of demineralized coal is significantly lower than the raw coal at 600℃ and 700℃, but as the temperature rises to 800℃ and 900℃, the difference of combustion reactivity between the two kinds of demineralized coal and the raw coal becomes smaller.关键词
准东煤/脱灰煤/酸洗/红外光谱/微型流化床/反应活性Key words
Zhundong coal/demineralized coal/acid leaching/FT-IR/micro fluidized bed/reactivity分类
资源环境引用本文复制引用
张文达,王鹏翔,孙绍增,赵义军,赵虹翔,严泰森,吴江全..酸洗脱灰对准东次烟煤结构和反应活性的影响[J].化工学报,2017,68(8):3291-3300,10.基金项目
国家自然科学基金项目(51536002). supported by the National Natural Science Foundation of China (51536002). （51536002）
