This review explores the potential of using different types of ash, namely fly ash, biomass ash, and coal ash etc., as mediums for CO2 capture and sequestration. The diverse origins of these ash types—municipal waste, organic biomass, and coal combustion—impart unique physicochemical properties that influence their suitability and efficiency in CO2 absorption. This review first discusses the environmental and economic implications of using ash wastes, emphasizing the reduction in landfill usage and the transformation of waste into value‐added products. Then the chemical/physical treatments of ash wastes and their inherent capabilities in binding or reacting with CO2 are introduced, along with current methodologies utilize these ashes for CO2 sequestration, including mineral carbonation and direct air capture techniques. The application of using ash wastes for CO2 capture are highlighted, followed by the discussion regarding challenges associated with ash‐based CO2 absorption approach. Finally, the article projects into the future, proposing innovative approaches and technological advancements needed to enhance the efficacy of ash in combating the increasing CO2 levels. By providing a comprehensive analysis of current strategies and envisioning future prospects, this review aims to contribute to the field of sustainable CO2 absorption and environmental management.

中文翻译：

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利用灰烬实现可持续二氧化碳吸收：当前策略和未来前景

本综述探讨了使用不同类型的灰，即飞灰、生物质灰和煤灰等作为二氧化碳捕获和封存介质的潜力。这些灰烬类型的不同来源（城市废物、有机生物质和煤炭燃烧）赋予了独特的物理化学特性，影响它们吸收二氧化碳的适用性和效率。本综述首先讨论了使用灰烬废物的环境和经济影响，强调减少垃圾填埋场的使用以及将废物转化为增值产品。然后介绍灰烬废物的化学/物理处理及其与二氧化碳结合或反应的固有能力，以及利用这些灰烬封存二氧化碳的现有方法，包括矿物碳酸化和直接空气捕获技术。重点介绍了利用灰烬废物捕获二氧化碳的应用，然后讨论了与基于灰烬的二氧化碳吸收方法相关的挑战。最后，本文展望了未来，提出了增强灰烬对抗不断上升的二氧化碳水平的功效所需的创新方法和技术进步。通过对当前战略进行全面分析并展望未来前景，本次审查旨在为可持续二氧化碳吸收和环境管理领域做出贡献。