Citation: DONG Lu, HUANG Ya-ji, YUAN Qi, CHENG Hao-qiang, DING Shou-yi, WANG Sheng, DUAN Yu-feng. Experimental study on the mercury removal from flue gas using manganese modified titanium-zirconium and titanium-tin composite oxide catalysts[J]. Journal of Fuel Chemistry and Technology, ;2020, 48(6): 741-751. shu

Experimental study on the mercury removal from flue gas using manganese modified titanium-zirconium and titanium-tin composite oxide catalysts

1.
Key Laboratory of Energy Thermal Conversion and Control of the Ministry of Education, Southeast University, Nanjing 210096, China
2.
Everbright Environmental Protection Technology Research Institute, Nanjing 210000, China
3.
China State Power Environmental Protection Research Institute, Nanjing 210031, China

Corresponding author: HUANG Ya-ji, heyyj@seu.edu.cn
Received Date: 14 April 2020
Revised Date: 5 June 2020

Fund Project: The project was supported by the National Key Research and Development Project (2016YFC0201105), the Postgraduate Research & Practice Innovation Program of Jiangsu Province (KYCX17_0079) and the Scientific Research Foundation of Graduate School of Southeast University (3203009703)the Scientific Research Foundation of Graduate School of Southeast University 3203009703the National Key Research and Development Project 2016YFC0201105the Postgraduate Research & Practice Innovation Program of Jiangsu Province KYCX17_0079

Figures(8)

In this study, TiO₂, TiZr and TiSn supports were prepared using co-precipitation method, and MnTi, MnTiZr, and MnTiSn catalysts with MnO₂ content of 10%were prepared by the wet impregnation method. BET, XRD, H₂-TPR, FT-IR, and XPS were employed to characterize the prepared samples. The Hg⁰ removal performance tests over the three catalysts were conducted in a fixed-bed reactor apparatus. The results indicated that the Hg⁰ removal performance of MnTiZr and MnTiSn catalysts was better than that of MnTi catalyst in the temperature range of 100-300℃. This could be attributed to the introduction of Sn and Zr, which increased the specific surface area of the catalyst, improved the low-temperature redox performance of the catalyst, and elevate the number of acid sites, the high valence manganese ions concentration and O^* content on the catalyst surface. The mercury removal efficiency of the MnTiSn catalyst was higher than that of MnTiZr catalyst at reaction temperature of 150-300℃, which could be ascribed to the higher redox performance of the MnTiSn catalyst and more content of the high valence manganese ions, O^*, and surface acid sites on its surface. During the removal of Hg⁰ in flue gas by MnTiZr and MnTiSn catalysts, active ingredients on the catalyst surface such as high-valence manganese ions and O^* were consumed and participated in the reaction of Hg⁰ oxidation to Hg²⁺. And the consumed amount of active ingredients on the surface of MnTiSn catalyst was more than that on the MnTiZr catalyst.
- mercury,
- manganese,
- TiO₂,
- ZrO₂,
- SnO₂
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