Abstract Alkali/alkaline earth metals (AAEMs) are widely present in various solid fuels. During the combustion process, the AAEMs undergo complex physical and chemical reactions with heavy metals and other minerals in the fuel, thereby affecting the migration and transformation of heavy metals. This paper mainly introduced the influence of AAEMs on the migration and transformation of As, Se, Pb and Cr, including the influence of alkali metals and alkaline earth metals on the migration and transformation of heavy metals, and the influence of particle agglomeration and coherence on heavy metal emissions. AAEMs can inhibit the volatilization of heavy metals. The combination of alkali metals and Cl elements reduces the production of PbCl2. The presence of alkali metals is beneficial to improve the adsorption efficiency of kaolin for Pb. AAEMs can form stable compounds with As and Se. However, at the same time, it should be noted that in the partial combination products of AAEMs and Cr, Cr exists in a hexavalent state and has high toxicity. AAEMs play a role in promoting and inhibiting the occurrence of agglomeration, respectively. An appropriate content of alkali metals is beneficial to reduce the release of heavy metals. By summarizing the influence of AAEMs on the migration and transformation of heavy metals, it is hoped to provide ideas for reducing the harm of heavy metals.

中文翻译：

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燃烧过程中碱/碱土金属对重金属迁移转化的影响综述

摘要 碱/碱土金属（AAEMs）广泛存在于各种固体燃料中。在燃烧过程中，AAEMs与燃料中的重金属等矿物质发生复杂的物理化学反应，从而影响重金属的迁移转化。本文主要介绍了AAEMs对As、Se、Pb和Cr迁移转化的影响，包括碱金属和碱土金属对重金属迁移转化的影响，以及颗粒团聚和相干对重金属迁移转化的影响。重金属排放。AAEMs可以抑制重金属的挥发。碱金属和 Cl 元素的结合减少了 PbCl2 的产生。碱金属的存在有利于提高高岭土对Pb的吸附效率。AAEM 可以与 As 和 Se 形成稳定的化合物。但同时需要注意的是，在AAEMs与Cr的部分结合产物中，Cr以六价态存在，具有较高的毒性。AAEMs分别在促进和抑制团聚发生方面发挥作用。适当的碱金属含量有利于减少重金属的释放。通过总结AAEMs对重金属迁移转化的影响，希望为降低重金属危害提供思路。适当的碱金属含量有利于减少重金属的释放。通过总结AAEMs对重金属迁移转化的影响，希望为降低重金属危害提供思路。适当的碱金属含量有利于减少重金属的释放。通过总结AAEMs对重金属迁移转化的影响，希望为降低重金属危害提供思路。