Advances on resource utilization of semi-dry desulfurization ash by thermal decomposition: a high-efficiency and low-temperature method for large-scale processing

Liu, Lincheng; Fan, Xiaohui; Gan, Min; Sun, Zengqing; Ji, Zhiyun; Wei, Jiaoyang; Liu, Jiayi

doi:10.1007/s11356-023-28818-w

Cited by 4 publications

(2 citation statements)

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“…22,23 The elevated sulfur and chlorine content present in SFGDA imposes constraints on its direct extensive utilization in the construction materials sector. 24 Moreover, the significant presence of calcium sulfite in SFGDA renders it prone to the re-emission of SO 2 upon being subjected to high temperatures. The substantial presence of f-CaO in SFGDA can lead to instability when it undergoes expansion upon contact with water.…”

Section: Introductionmentioning

confidence: 99%

“…However, it is projected that output of SFGDA would increase steadily as semidry flue gas desulfurization technology is increasingly used . Nevertheless, SFGDA introduces a handling challenge due to its complicated components and poor chemical stability. , The elevated sulfur and chlorine content present in SFGDA imposes constraints on its direct extensive utilization in the construction materials sector . Moreover, the significant presence of calcium sulfite in SFGDA renders it prone to the re-emission of SO 2 upon being subjected to high temperatures.…”

Section: Introductionmentioning

confidence: 99%

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An Efficient Method for Carbon Dioxide Sequestration Using Semidry Flue Gas Desulfurization Ash

Gan,

Wei,

Liu

et al. 2024

Ind. Eng. Chem. Res.

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As a sort of industrial solid waste, semidry flue gas desulfurization ash (SFGDA) exhibits notable attributes such as elevated calcium and alkali content, which facilitate the mineralization of CO 2 flue gas. Herein, a novel approach is employed to effectively fix CO 2 using SFGDA via a combination of direct and indirect mineralization processes. During the direct mineralization stage, CO 2 reacts with calcium ions in the SFGDA slurry, resulting in the reduction of calcium ions' concentration and the dissolution of sparingly soluble calcium salt. Subsequently, in the indirect mineralization stage, a moderate quantity of ammonia solution is introduced into the slurry. More calcium ions are generated to fix a large quantity of low-concentration CO 2 . Results demonstrate that at 40 °C, 300 rpm, 10% CO 2 , and 0.78 mol/L ammonia solution, the mineralization efficiency maintains an amazing 216 kg of CO 2 per ton of SFGDA. This approach provides an alternative candidate for industrialized treatment of SFGDA and CO 2 flue gas.

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Section: Introductionmentioning

confidence: 99%