Effect of Ce/Zr molar ratio on the catalytic performance of Ru/CexZr1-xO2 in the wet air oxidation of phenol

ZHAO Ning; XIAO Yong; LU Huai-qian; HOU Bo; LI De-bao; JIA Li-tao

Volume 46 Issue 8

Aug. 2018

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Article Navigation > Journal of Fuel Chemistry and Technology > 2018 > 46(8): 1018-1024

ZHAO Ning, XIAO Yong, LU Huai-qian, HOU Bo, LI De-bao, JIA Li-tao. Effect of Ce/Zr molar ratio on the catalytic performance of Ru/CexZr1-xO2 in the wet air oxidation of phenol[J]. Journal of Fuel Chemistry and Technology, 2018, 46(8): 1018-1024.

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ZHAO Ning, XIAO Yong, LU Huai-qian, HOU Bo, LI De-bao, JIA Li-tao. Effect of Ce/Zr molar ratio on the catalytic performance of Ru/Ce_xZr_1-xO₂ in the wet air oxidation of phenol[J]. Journal of Fuel Chemistry and Technology, 2018, 46(8): 1018-1024.

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Effect of Ce/Zr molar ratio on the catalytic performance of Ru/Ce_xZr_1-xO₂ in the wet air oxidation of phenol

ZHAO Ning^{1, 2},
XIAO Yong^{1
,
,},
LU Huai-qian^{1
,
,},
HOU Bo¹,
LI De-bao¹,
JIA Li-tao¹

1.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China

More Information

Corresponding author: XIAO Yong, E-mail: xiaoyong@sxicc.ac.cn; LU Huai-qian, E-mail:huaiqianlu@gmail.com
Received Date: 2018-04-04
Rev Recd Date: 2018-06-03

Available Online: 2021-01-23

Publish Date: 2018-08-10

Abstract

Abstract

A series of Ce_xZr_1-xO₂ catalysts with different Ce/Zr molar ratios were prepared by sol-gel method and characterized by X-ray diffraction (XRD), nitrogen sorption, Raman spectra, oxygen storage capacity (OSC), thermogravimetry (TG) and pyridine adsorption infrared (Py-FTIR) spectra; the performance of Ce_xZr_1-xO₂ in catalytic wet air oxidation (CWAO) of phenol was investigated. The results demonstrate that Ce_xZr_1-xO₂ solid solution is formed by doping ZrO₂ in CeO₂ and the OSC value of Ce_xZr_1-xO₂ increases with an increase in the content of ZrO₂. In comparison with pure CeO₂, Ce_xZr_1-xO₂ solid solution has more Lewis acid sites. The catalytic activity of Ce_xZr_1-xO₂ is related to both OSC and surface acidity; the Lewis acid sites are favorable for the complete oxidation of phenol, whereas high OSC may promote the carbonaceous deposition that leads to catalyst deactivation. The Ru/Ce_0.75Zr_0.25O₂ catalyst exhibits high activity in phenol oxidation; after reaction for 5 h at 160℃ and 2 MPa O₂, phenol conversion and total organic carbon (TOC) rate reach 100% and 99%, respectively.
- catalytic wet air oxidation,
- Ce-Zr solid solution,
- phenol,
- oxygen storage capacity,
- acidity,
- carbon deposit

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References(31)

References

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