Ngoc Minh Vu Thi, Pham Vuong-Hung, Tung Vu Hoang, Tung Cao Tho, Phuong Nguyen Thi Hong
School of Chemical Engineering, Hanoi University of Science and Technology (HUST), No. 01, Dai Co Viet Road, Hanoi, Vietnam.
Advanced Institute for Science and Technology (AIST), Hanoi University of Science and Technology (HUST), No. 01, Dai Co Viet Road, Hanoi, Vietnam.
J Anal Methods Chem. 2023 Feb 27;2023:8597376. doi: 10.1155/2023/8597376. eCollection 2023.
Coal-fired power plant fly ash is a global environmental concern due to its small particle size, heavy metal content, and increased emissions. Although widely used in concrete, geopolymer, and fly ash brick production, a large amount of fly ash remains in storage sites or is used in landfills due to inadequate raw material quality, resulting in a waste of a recoverable resource. Therefore, the ongoing need is to develop new methods for recycling fly ash. The present review differentiates the physiochemical properties of fly ash from two coal combustion processes: fluidized bed combustion and pulverized coal combustion. It then discusses applications that can consume fly ash without strict chemical requirements, focusing on firing-associated methods. Finally, the challenges and opportunities of fly ash recycling are discussed.
由于煤电厂粉煤灰粒径小、重金属含量高且排放量增加，它已成为一个全球性的环境问题。尽管粉煤灰广泛应用于混凝土、地质聚合物和粉煤灰砖生产中，但由于原材料质量不佳，仍有大量粉煤灰留在储存场地或被用于填埋，导致可回收资源的浪费。因此，目前迫切需要开发新的粉煤灰回收利用方法。本综述区分了两种煤炭燃烧过程（流化床燃烧和煤粉燃烧）产生的粉煤灰的物理化学性质。然后讨论了无需严格化学要求即可消耗粉煤灰的应用，重点是与煅烧相关的方法。最后，探讨了粉煤灰回收利用面临的挑战和机遇。
