The highly efficient removal of HCN over CuMn/CeO catalytic material
In this work, porous CeO 2 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 2 loaded with copper and manganese oxides at the mass ratio of 8/2 (Cu 8 Mn 2 /CeO 2 ) exhibited the hi...
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Published in | RSC advances Vol. 11; no. 15; pp. 8886 - 8896 |
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Main Authors | , , , , , , |
Format | Journal Article |
Published |
26.02.2021
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Abstract | In this work, porous CeO
2
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
2
loaded with copper and manganese oxides at the mass ratio of 8/2 (Cu
8
Mn
2
/CeO
2
) 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% H
2
O, 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 Cu
2+
and Mn
4+
all played an important role in determining the good catalytic activity of the prepared samples. NH
3
-TPD analysis indicated the introduction of MnO
x
promoted the conversion of NH
3
and N
2
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 Cu
8
Mn
2
/CeO
2
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.
In this work, porous CeO
2
flower-like spheres loaded with bimetal oxides were prepared to achieve effective removal of HCN in the lower temperature region of 30-150 °C. |
---|---|
AbstractList | In this work, porous CeO
2
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
2
loaded with copper and manganese oxides at the mass ratio of 8/2 (Cu
8
Mn
2
/CeO
2
) 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% H
2
O, 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 Cu
2+
and Mn
4+
all played an important role in determining the good catalytic activity of the prepared samples. NH
3
-TPD analysis indicated the introduction of MnO
x
promoted the conversion of NH
3
and N
2
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 Cu
8
Mn
2
/CeO
2
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.
In this work, porous CeO
2
flower-like spheres loaded with bimetal oxides were prepared to achieve effective removal of HCN in the lower temperature region of 30-150 °C. |
Author | Zhou, Tian Yang, Yulin Zhu, Anna Li, Jigang Yi, Zhihao Wei, Shouping Sun, Jie |
AuthorAffiliation | State Key Laboratory of NBC Protection for Civilian Institute of NBC Defense Department of Chemistry Defense |
AuthorAffiliation_xml | – name: Department of Chemistry Defense – name: Institute of NBC Defense – name: State Key Laboratory of NBC Protection for Civilian |
Author_xml | – sequence: 1 givenname: Zhihao surname: Yi fullname: Yi, Zhihao – sequence: 2 givenname: Jie surname: Sun fullname: Sun, Jie – sequence: 3 givenname: Jigang surname: Li fullname: Li, Jigang – sequence: 4 givenname: Yulin surname: Yang fullname: Yang, Yulin – sequence: 5 givenname: Tian surname: Zhou fullname: Zhou, Tian – sequence: 6 givenname: Shouping surname: Wei fullname: Wei, Shouping – sequence: 7 givenname: Anna surname: Zhu fullname: Zhu, Anna |
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DOI | 10.1039/d0ra10177j |
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Snippet | In this work, porous CeO
2
flower-like spheres loaded with bimetal oxides were prepared to achieve effective removal of HCN in the lower temperature region of... |
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Title | The highly efficient removal of HCN over CuMn/CeO catalytic material |
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