消石灰因價格低廉廣為應用在煙道氣脫硫的鹼性處理劑，其粒子微細容易凝聚成團，使其應用於煙道氣脫硫時與酸氣接觸面積小，降低脫硫效率。本研究以提昇消石灰脫硫性能為目的，利用SEM、XRD、XRF、雷射粒徑分析儀等瞭解粒度及粒子間凝聚情形。進行消石灰的消化實驗，觀察生石灰原料成份、固液比、粒徑尺寸、添加表面助劑等因子對消化反應有何影響，並利用覆膜原理將消石灰分散在未燃碳擔體上，探討覆膜產物的外觀及比表面積以及脫硫性能。
所得結果顯示，消石灰基本上是由約1μm左右的氫氧化鈣顆粒所團聚而成的礦石塊體或粉末，團聚導致比表面積在20m2/g以下。在消化實驗過程中調整反應條件：生石灰與水的比例、添加助劑或將生石灰原料研磨至-400mesh等方法，可以幫助產物的比表面積增加，最高約達28.8m2/g以下，不過由於解粒效果有限，對於比表面積的增加也有限。根據覆膜實驗結果，覆膜方法可以改善消石灰顆粒的聚團現象，大幅提昇產物比表面積，在實驗條件：生石灰/擔體為1:5、室溫、4hr下獲得較佳比表面積的產物，達到51.1m2/g。根據脫硫性能分析結果，覆膜產物以相當快的速度發揮脫硫效果，雖然含有消石灰的量僅在33%~9%間，但是在10min內脫硫量都大於未覆膜的消石灰，可有效處理停留時間僅數分鐘大量煙氣，更適合工業用燃燒鍋爐的煙道氣脫硫工作，具有大幅提升脫硫效果且降低使用量的功效，未來工業應用的潛力大。

Slaked lime is widely used because of the low prices in the Flue Gas Desulfurization (FGD) involved in this process. The fine particles in the slaked lime agglomerate easily, so the areas which contact acid gas are small when applied to FGD, lowering the desulfurizing efficiency. The aim of this study is to improve the desulfurizing performance of slaked lime using, and SEM, XRD, XRF, Laser Diffraction Particle Size Analyzer to determine the sizes and agglomerates. A lime slaking experiment is conducted in order to observe the effect of the components, solid/liquid ratios, particle sizes, surfactants. This study also considers the dispersion of the slaked lime particles on the surfaces of unburned carbons (UC) and discusses the surface morphologies, specific surface area, and desulfurizing ability.
The results indicate that slaked lime is composed of agglomerated particles about 1 μm in size. Because they are agglomerated, the specific surface area is below 20m2/g. Changing the solid/liquid ratio, adding a surfactant, or rushing the experiment materials below 400 mesh can raise the specific surface area to 28.8m2/g, but the effect is limited. Based on the laminating results, it can be posited that laminating can improve the agglomeration of slaked lime particles. The specific surface area was 51.1m2/g when the experimental parameters for lime/unburned carbon was 1:5, held at room temperature for 4 hours. Based on the experimental analysis of the desulfurization, the laminating samples took effect on the desulfurization quickly. The quantity of slaked lime in the laminating samples was found to be 33%~9% of the un-laminated samples, but the desulfurization quantities were larger during the initial 10 minutes. This result indicates that laminating samples can absorb the flue gas effectively, rendering it more available to use in FGD. This process can raise the desulfurizing performance considerably and also can lower the amount of slaked lime required, therefore it has potential for the industrial applications.

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