Hydrothermal Synthesis of CeO2 Nanoparticles on Activated Carbon with Enhanced Desulfurization Activity

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• 作者：Zheng Yan ; Jinping Wang ; Ruqiang Zou ; Lili Liu ; Zuotai Zhang ; Xidong Wang
• 刊名：Energy & Fuels
• 出版年：2012
• 出版时间：September 20, 2012
• 年：2012
• 卷：26
• 期：9
• 页码：5879-5886
• 全文大小：594K
• 年卷期：v.26,no.9(September 20, 2012)
• ISSN：1520-5029

文摘

Nanosized CeO₂ particles with a diameter of 200 nm were successfully loaded on activated carbon (AC) via a single-step hydrothermal process. The synthetic parameters, including hydrothermal temperature, precursor concentration, and reaction time, were regulated to control the size of the as-prepared CeO₂ nanoparticles. The catalytic activity of CeO₂ nanoparticles/AC was investigated by dynamic adsorption of SO₂ from simulated flue gas, and the results exhibited remarkably enhanced SO₂ adsorption capacity. The reaction mechanism of adsorbing and trapping SO₂ by CeO₂ nanoparticles/AC was discussed by laser Raman spectroscopy, X-ray powder diffraction, and thermodynamic calculations, which demonstrated that, in the presence of SO₂ and O₂, the generation of sulfate, accompanied by partial reduction of Ce⁴⁺ to Ce³⁺, was the key process during SO₂ removal in our desulfurization experiments.