Preparation and desulfurization activity of nano-CeO2/γ-Al2O3 catalysts

被引：0
作者：
Qi Yang
Hui Hu
Shan-Shan Wang
机构：
[1] Huazhong University of Science and Technology,School of Environment Science and Engineering
[2] Wuchang Shouyi University,Department of Urban Construction
[3] Wuhan Zuoling New Town Development and Investment Co.,undefined
[4] Ltd.,undefined
来源：
Rare Metals | 2018年 / 37卷
关键词：
Nano-CeO; /γ-Al; O; Microemulsion; Catalyst; Desulfurization;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
γ-Al2O3-supported CeO2 catalysts were prepared by microemulsion and impregnation methods and characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM) techniques. At the same time, the desulfurization activity of catalysts was investigated. The results show that nanoscale active substances and a high desulfurization effect are achieved by microemulsion, exhibiting a significant dominance compared with traditional impregnation method. The optimal preparation condition is temperature of 30 °C and ratio of [H2O]/[surface active agent] of 7 with slow demulsification. The activated catalysts still keep high and stable desulfurization activity during a wide temperature range of 450–600 °C. Among a series of prepared catalysts, the desulfurization rate of 6CeO2/γ-Al2O3 is the highest, reaching up to 80 % when temperature is higher than 550 °C. The catalytic reduction mechanism of SO2 over nano-CeO2/γ-Al2O3 follows redox mechanism.
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页码：554 / 560
页数：6
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