High-End Reclamation of Coal Fly Ash Focusing on Elemental Extraction and Synthesis of Porous Materials
High-End Reclamation of Coal Fly Ash Focusing on Elemental Extraction and Synthesis of Porous Materials
复制标题
粉煤灰高端再生，聚焦元素提取与多孔材料合成
DOI：
10.1021/acssuschemeng.1c00587
复制
发表时间：
2021-05-07
影响因子：
8.4
通讯作者：
Jiang, Jianguo
中科院分区：
文献类型：
--
作者：
Ju, Tongyao;Han, Siyu;Jiang, Jianguo
煤炭燃烧因其成本低、热值高，在全球能源供应中占很大比例；然而，在此过程中产生的大量粉煤灰（CFA）污染造成了许多环境问题。CFA传统上用于建筑和土壤修复，尽管有人尝试使用CFA来应对矿产资源的发展短缺。大量研究对CFA的高端回收利用进行了研究，获得了关键金属、多孔材料等有价值的产品，广泛应用于化工、生态修复等领域。在本研究中，我们发现各种提取和合成方法总结了CFA的高附加值处理方法。溶解和烧结工艺用于提取，而碳热和电解技术具有其他独特的优势。该过程中使用的前驱体和聚合物是影响多孔材料合成的两个主要因素，它们提供了元素来源并诱导形成可预测的结构。考虑到所涉及的机理，可以对现有的CFA回收利用的复杂方法进行梳理，以开发高附加值的CFA回收技术。
Coal combustion accounts for a large proportion of the global energy supply due to its low cost and high heat value; however, pollution from the large amounts of coal fly ash (CFA) generated during the process causes many environmental problems. CFA has traditionally been used in construction and soil remediation, although there have been attempts to use CFA in response to the developing shortage of mineral resources. Numerous studies have investigated high-end recycling of CFA to obtain valuable products such as critical metals and porous materials, which are widely used in chemical engineering, ecological remediation, and other fields. In this study, we found that various extraction and synthesis methods summarized high value-added treatments of CFA. Dissolution and sintering processes were applied for extraction, while carbothermal and electrolysis techniques offered other unique advantages. The precursors and polymers used in the procedures were the two main factors influencing the synthesis of porous materials, providing a source of elements and inducing the formation of predictable structures. Considering the mechanisms involved, the complex methods used in state-of-the-art CFA recycling could be combed to develop high value-added CFA reclamation techniques.