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The highly efficient removal of HCN over Cu8Mn2/CeO2 catalytic material.


ABSTRACT: In this work, porous CeO2 flower-like spheres loaded with bimetal oxides were prepared to achieve effective removal of HCN in the lower temperature region of 30-150 °C. Among all samples, the CeO2 loaded with copper and manganese oxides at the mass ratio of 8/2 (Cu8Mn2/CeO2) exhibited the highest catalytic activity: the HCN removal rate was nearly 100% at 90 °C at the conditions of 120 000 h-1 and 5 vol% H2O, the catalytic activity of which was higher than for other reported catalysts. The introduction of MnO x could improve the dispersion of CuO particles and increase the total acid sites of the prepared samples. It was proved that the synergy between CuO and MnO x , the chemisorption oxygen, the oxygen vacancies, the Cu2+ and Mn4+ all played an important role in determining the good catalytic activity of the prepared samples. NH3-TPD analysis indicated the introduction of MnO x promoted the conversion of NH3 and N2 selectivity by increasing the acid sites of the sample. According to the C, N balance data and FT-IR results, when the temperature was below 30 °C, the removal of HCN over Cu8Mn2/CeO2 was mainly by chemisorption and the HCN breakthrough behaviors corresponded to the Yoon and Nelson's model. When temperature was above 120 °C, the HCN was totally removed by catalytic hydrolysis and catalytic oxidation.

SUBMITTER: Yi Z 

PROVIDER: S-EPMC8695306 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature

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The highly efficient removal of HCN over Cu<sub>8</sub>Mn<sub>2</sub>/CeO<sub>2</sub> catalytic material.

Yi Zhihao Z   Sun Jie J   Li Jigang J   Yang Yulin Y   Zhou Tian T   Wei Shouping S   Zhu Anna A  

RSC advances 20210226 15


In this work, porous CeO<sub>2</sub> flower-like spheres loaded with bimetal oxides were prepared to achieve effective removal of HCN in the lower temperature region of 30-150 °C. Among all samples, the CeO<sub>2</sub> loaded with copper and manganese oxides at the mass ratio of 8/2 (Cu<sub>8</sub>Mn<sub>2</sub>/CeO<sub>2</sub>) exhibited the highest catalytic activity: the HCN removal rate was nearly 100% at 90 °C at the conditions of 120 000 h<sup>-1</sup> and 5 vol% H<sub>2</sub>O, the cataly  ...[more]

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