• 作者： Ho, Ch'un-Sung; Shih, Shin-Min
• 中文摘要： 本研究係在模擬噴霧乾燥除硫程序的袋式過濾器中的條件下,探討燃燒廢氣中的氧氣對氫氧化鈣與二氧化硫反應的影響。本文中發表了在60.degree.C和1,000ppm SO/sub 2/的反應條件下所得的結果。反應產物為 CaSO/sub 3/. bcdot.(1/2)H/sub 2/O與 CaSO/sub 4/.bcdot.(1/2)H/sub 2/O,且硫酸鹽對亞硫酸鹽的莫耳比約為0.23。相對溼度對 Ca(OH)/sub 2/與SO/sub 2//O/sub 2/氣體混合物的反應影響很大。當相對溫度低於60%時,存有氧氣會抑制硫酸化反應的進行; 但當相對溼度高於60%時,氧氣反而會促進硫酸化反應。氣相中的氧氣濃度在1至5.4%的範圍內變化時, Ca(OH)/sub 2/的硫酸化程度與其產物的分布比率大致上維持相同。Ca(OH)/sub 2/的硫酸化反應與CaSO/sub 3/. bcdot.(1/2)H/sub 2/O的氧化反應,其真正化學反應速率非常快,總反應速率為晶粒產物層擴散控制,直到反應中止為止。
• 英文摘要： The effect of O/sub 2/ in the flue gas on the reaction of Ca(OH)/sub 2/ with SO/sub 2/ has been studied under the conditions simulating the filter bag of the spray-drying flue gas desulfurization process. The results recorded at 60.degree.C and 1,000ppm SO/sub 2/ were presented. The reaction products were CaSO/sub 3/-(1/2)H/sub 2/O and CaSO/sub 4/-(1/2)H/sub 2/O, and the sulfate to sulfite molar ratio was approximately 0.23. The relative humidity of the gas phase significantly affected the reaction of Ca(OH)/sub 2/ with SO/sub 2//O/sub 2/ gas mixture. The presence of oxygen suppressed the sulfation reaction, when the relative humidity was lower than 60%, and enhanced the sulfation reaction when the relative humidity was higher than 60%. The extent of the sulfation of Ca(OH)/sub 2/ and the product distribution remained about the same for the gas phase O/sub 2/ concentration varying in the range from 1 to 5.4%. The intrinsic rates of the sulfation of Ca(OH)/sub 2/ and the oxidation of CaSO/sub 3/-(1/2)H/sub 2/O were very fast, and the overall reaction rate was controlled by grain product-layer diffusion until the reactions had stopped.
• 中文關鍵字： 燃燒廢氣除硫; 反應動力學; 氫氧化鈣; 二氧化硫
• 英文關鍵字： Flue Gas Desulfurization; Reaction Kinetics; Calcium Hydroxide; Sulfur Dioxide