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Study on Reduction and Sulfidation of ZnFe2O4 Desulfurizer at High Temperature
Author(s): 
Pages: 546-551
Year: Issue:  6
Journal: JOURNAL OF CHEMICAL ENGINEERING OF CHINESE UNIVERSITIES

Keyword:  铁酸锌高温煤气脱硫剂还原硫化动力学;
Abstract: 采用共沉淀法制备了ZnFe2O4高温煤气脱硫剂,并在动态热天平上对其还原和硫化行为进行了研究, 分别考察了温度、反应气氛对脱硫性能的影响.低于300 oC,还原反应基本不发生;在450 oC出现ZnFe2O4脱硫剂的最大还原速率; CO还原能力远不及H2.ZnFe2O4脱硫剂硫化反应速率与温度、H2S浓度成正比,300oC左右出现ZnFe2O4脱硫剂的最大硫化速率.还原与硫化反应可用等效粒子模型描述,ZnFe2O4脱硫剂的还原与硫化反应存在控制段的转移.
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