Synthesis and utilization of polyol-modified high specific surface area Ca(OH)2: an investigation

• Published in: Environmental science and pollution research international Vol. 31; no. 22; pp. 32714 - 32724
• Main Authors: Yan, Dongjie, Zhu, Yingping, Zhao, Jiaxuan, Zhang, Qian, Wang, Yongping, Yang, Shengjiong
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.05.2024; Springer Nature B.V
• Subjects: Acids; Air pollution control; Aquatic Pollution; Atmospheric Protection/Air Quality Control/Air Pollution; Calcium hydroxide; Cultural heritage; Desulfurization; Desulfurizing; Digestion; Earth and Environmental Science; Ecotoxicology; Efficiency; Environment; Environmental Chemistry; Environmental Health; Environmental science; Flue gas; Flue gas desulfurization; Gas flow; Grain size; Industrial production; Lignin; Lime; Mass transfer; oil and gas industry; Particle size; Petrochemicals; Petrochemicals industry; Pollution; Pollution control equipment; Polyols; Research Article; Slaked lime; Specific surface; Surface area; Surfactants; Triethanolamine; Waste Water Technology; wastewater; Water Management; Water Pollution Control; Ca(OH); Quicklime digestion; Specific surface area; DFT; Polyols; Ca(OH)2
• ISSN: 1614-7499; 0944-1344; 1614-7499
• DOI: 10.1007/s11356-024-33390-y

Calcium hydroxide (Ca(OH) 2 ) finds widespread use in the petrochemical industry, particularly in flue gas desulfurization applications. However, its conventional usage is limited by its inherently low specific surface area, hampering its efficiency. To address this limitation, this study aims to develop a simple and industrially scalable preparation process for Ca(OH) 2 with a high specific surface area, thereby enhancing its effectiveness in various applications. This study aimed to develop a preparation process for making Ca(OH) 2 with a high specific surface area, suitable for industry and easy to make. Ca(OH) 2 with a specific surface area of 41.555 m 2 /g was successfully synthesized by incorporating polyols during lime digestion. The prepared high specific surface area Ca(OH) 2 is more than five times the specific surface area of ordinary Ca(OH) 2 . Incorporation of polyols within the lime digestion process induces a reduction in both Ca(OH) 2 grain size and particle dimensions, concurrently amplifying the specific surface area and optimizing mass transfer efficiency. Specifically, the desulfurization breakthrough time for Ca(OH) 2 subject to a 15% triethanolamine modification was notably extended to 879 s, surpassing the desulfurization breakthrough time of unaltered Ca(OH) 2 by more than tenfold. Moreover, the modified Ca(OH) 2 exhibited remarkable efficacy in neutralizing acidic wastewater. A new approach for the preparation of high-performance Ca(OH) 2 is proposed in this study, which could facilitate the industrial production of Ca(OH) 2 with high specific surface area.