Resources Recycling ISSN:2765-3439(Print) 2765-3447(Online) 자원리싸이클링

In this study, a high-performance hydrated lime (Ca(OH)₂) production process was developed to enhance SO₂ removal efficiency in flue gas desulfurization (FGD) systems by increasing the specific surface area and pore volume of hydrated lime. Quicklime (CaO) was crushed to particles smaller than 1 mm, sieved through a 200-mesh screen, and subjected to dry hydration under optimal conditions: a W/CaO ratio of 0.5, a hydration temperature of 45 ℃, and the addition of 4 % ethylene glycol. During post-treatment, a drying temperature of 350 ℃ yielded a maximum specific area and pore volume of 39.1 m²/g and 0.177 cm³/g, respectively. The hydrated lime with a specific area exceeding 30 m²/g had a total neutralizing capacity approximately 4 % higher than that of hydrated lime having a surface area of 24 m²/g, underscoring the role of surface area in enhancing solubility and reactivity. The pre- and post-treatment processes effectively eliminated impurities and achieved a uniform particle distribution with an optimized pore structure, thereby maximizing the quality and reactivity of the hydrated lime. This study provides a practical approach for producing high-performance hydrated lime, meeting the efficiency and economic feasibility demands of industrial applications such as FGD. The findings offer valuable insights into sustainable environmental management technologies.