Regenerable MgO-Based SOx Removal Sorbents Promoted with Cerium and Iron Oxide in RFCC

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• 作者：Lee Soo Jae ; Hee Kwon Jun ; Suk Yong Jung ; Tae Jin Lee ; Chung Kul Ryu ; and Jae Chang Kim
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2005
• 出版时间：December 21, 2005
• 年：2005
• 卷：44
• 期：26
• 页码：9973 - 9978
• 全文大小：311K
• 年卷期：v.44,no.26(December 21, 2005)
• ISSN：1520-5045

文摘

The aims of this work were verifying the roles of various promoters in absorption andregeneration. In particular, we focus our attention on the oxidation properties of Ce, Co, and Feand regeneration property of Fe of the MgO-based sorbents. The MgO-based SO₂ sorbentspromoted with Ce, Co, Fe, and Cu were developed for use in RFCC and FCC units. Their abilityfor SO₂ absorption as well as regeneration was investigated in a fixed-bed reactor under RFCCand FCC reaction conditions. The promoters played an important role in transforming SO₂ intoSO₃, which could be easily absorbed into MgO. Their oxidation ability increased in the followingorder Fe < Co < Ce. In addition, their reuse through the regeneration of sorbents with hydrogenin a FCC unit depended on these promoters. In particular, the MgO sorbent which was promotedsimultaneously with Ce and Fe showed excellent characteristics in SO₂ removal and regenerationin that this material satisfies the requirements of a large amount of SO₂ absorption (ads. sulfurg/g sorbent) along with fast and complete regeneration under mild condition (1 atm, 530 C).