{"title":"A review on release and transformation behavior of alkali metals during high-alkali coal combustion","authors":"Zhaoran Cao , Jiakai Zhang , Weiguo Pan","doi":"10.1016/j.seta.2024.103966","DOIUrl":null,"url":null,"abstract":"<div><p>High-alkali coal is abundant and can cope with the current energy supply and demand gap. However, the sustainable utilization of high-alkali coals is limited by their abundance of alkali metal species, which can lead to severe ash-related problems such as ash accumulation, slagging, and corrosion during its combustion in boilers. To explore the clean and sustainable utilization of high-alkali coal in coal-fired boilers, it is crucial to study the release and transformation behavior of alkali metals in the combustion process. First, this paper reviews the alkali metal measurement methods for high alkali-coal combustion processes. Further, the migration properties of alkali metals are summarized in terms of coal composition, temperature, and combustion atmosphere. Current co-combustion technologies for high-alkali coals with additives/other fuels and their effects on alkali metals are summarized and evaluated. Finally, the authors propose suggestions for the development of high-alkali coal combustion technologies based on current research on the behavior of alkali metals.</p></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":"70 ","pages":"Article 103966"},"PeriodicalIF":7.1000,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Sustainable Energy Technologies and Assessments","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S221313882400362X","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 0
Abstract
High-alkali coal is abundant and can cope with the current energy supply and demand gap. However, the sustainable utilization of high-alkali coals is limited by their abundance of alkali metal species, which can lead to severe ash-related problems such as ash accumulation, slagging, and corrosion during its combustion in boilers. To explore the clean and sustainable utilization of high-alkali coal in coal-fired boilers, it is crucial to study the release and transformation behavior of alkali metals in the combustion process. First, this paper reviews the alkali metal measurement methods for high alkali-coal combustion processes. Further, the migration properties of alkali metals are summarized in terms of coal composition, temperature, and combustion atmosphere. Current co-combustion technologies for high-alkali coals with additives/other fuels and their effects on alkali metals are summarized and evaluated. Finally, the authors propose suggestions for the development of high-alkali coal combustion technologies based on current research on the behavior of alkali metals.
期刊介绍：
Encouraging a transition to a sustainable energy future is imperative for our world. Technologies that enable this shift in various sectors like transportation, heating, and power systems are of utmost importance. Sustainable Energy Technologies and Assessments welcomes papers focusing on a range of aspects and levels of technological advancements in energy generation and utilization. The aim is to reduce the negative environmental impact associated with energy production and consumption, spanning from laboratory experiments to real-world applications in the commercial sector.
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