Enhancement of Ca(OH)2/Fly Ash Sorbent for the Dry-Desulfurization Process

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• 作者：Mitsuo Yamamoto ; Satoshi Komaki ; Daichi Nakajima ; Norihiko Matsushima ; Dan Liu ; Masateru Nishioka ; Masayoshi Sadakata
• 刊名：Energy & Fuels
• 出版年：2006
• 出版时间：September 2006
• 年：2006
• 卷：20
• 期：5
• 页码：1901 - 1905
• 全文大小：189K
• 年卷期：v.20,no.5(September 2006)
• ISSN：1520-5029

文摘

Ca(OH)₂/fly ash sorbent has been studied as an effective method for SO₂ removal. The effect of iron andother species for enhancing the ability of Ca(OH)₂/fly ash sorbent was investigated in this study. At first,Fe(NO₃)₃ was added in the preparation of the sorbent, and TG analysis was carried out. The Ca utilization rateover a period of 90 min was about 10% greater than that for Ca(OH)₂/fly ash sorbent. However, it was foundthat iron is not effective for enhancing the ability of Ca(OH)₂/fly ash sorbent but that NO₃^- was the mosteffective factor to enhance it. The mechanism of enhancing the Ca utilization rate was also investigated, andit was found that Ca(NO₃)₂ was produced in the sorbent and reacted with SO₂, so that the reaction Ca(NO₃)₂+ SO₂ CaSO₄ + 2NO + O₂ proceeded.