Investigation on the Application of C12A7 in Flue Gas Desulfurization at Low–Moderate Temperature

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• 作者：Qun Chen ; Kazumasa Yoshida ; Hidetoshi Yamamoto ; Masaki Uchida ; Masayoshi Sadakata
• 刊名：Energy & Fuels
• 出版年：2007
• 出版时间：November 2007
• 年：2007
• 卷：21
• 期：6
• 页码：3264 - 3269
• 全文大小：396K
• 年卷期：v.21,no.6(November 2007)
• ISSN：1520-5029

文摘

It has been demonstrated that radicals and/or anions can promote chain reactions improving desulfurization efficiency in flue gas. Recent studies have evidently shown that specially synthesized C12A7 is a prominent source of O⁻ which has been found to be one of the most active radicals acting as a potential oxidant in many applications. In the interest of applying C12A7 in flue gas desulfurization for coal combustion facilities, reactions of C12A7 with SO₂ at 200–700 °C were implemented in a plug flow reactor. Both SO₂ removal efficiency and the apparent reaction rate constants derived from the experiments were compared with those of CaO. The products were analyzed by TG-MS and FTIR. The result showed that under the experimental conditions the reactivity of C12A7 directly reacted with SO₂ was lower than CaO samples because of its low surface area accessibility. The product analysis verified that O⁻ in C12A7 was involved in desulfurization reaction as an effective oxidant. On the basis of these results, a feasible application approach for C12A7 in desulfurization process was suggested so as to improve SO₂ removal efficiency. A preliminary experiment was further devised to support the feasibility.