煤中有害微量元素及其在加工转化中的行为研究进展

Hazardous trace elements in coal and their behaviors during processing and utilization

从成因上论证了煤中有害微量元素存在的必然性,基于有害微量元素在煤中的赋存特征,评介了开采、洗选、燃烧、热解、气化等过程中煤中有害微量元素迁移、转化的研究现状,指出气化过程中煤中有害微量元素演变研究中的不足,强调加强有害微量元素在典型气化工艺过程中迁移转化规律与污染防治方法研究的必要性,针对相关领域研究各自独立、衔接不紧的问题,提出从煤炭全生命周期的角度对有害微量元素展开整体性研究或为煤中有害微量元素未来的研究方向。

The existence and patterns of the hazardous trace elements in coals depend on the coal-forming process,which inevitably have the influences on coal processing and utilization. A critical survey of progress in research on migration and transformation of the hazardous trace elements during coal mining,preparation,combustion,pyrolysis and gasification are presented in this paper. The deficiency of detailed study on hazardous trace elements＇ evolution in coal gasification process can be perceived. It is of great importance to strengthen research on migration,transformation and pollution control of hazardous trace elements in typical coal gasification processes in modern coal chemical industry.Besides that,to integrate the investigations and results scattered in different disciplines and fields,an overall study on hazardous trace elements based on the whole life cycle of coal is proposed.