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Metal-organic framework loaded manganese oxides as efficient catalysts for low-temperature selective catalytic reduction of NO with NH3

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Frontiers of Chemical Science and Engineering 2017年第4期11卷 594-602页

作者： Zhang, Minhua Huang, Baojuan Jiang, Haoxi Chen, Yifei Tianjin Univ Key Lab Green Chem Technol Minist Educ R&D Ctr Petrochem Technol Tianjin 300072 Peoples R China Collaborat Innovat Ctr Chem Sci & Engn Tianjin 300072 Peoples R China

A mild in-situ deposition method was used to fabricate Mn-based catalysts on a UiO-66 carder for the selective catalytic reduction of NO by NH3 （NH3-SCR）. The catalyst with 8.5 wt-% MnOx loading had the highest catalytic activity for NH3-SCR with a wide temperature window （100-290 C） for 90% NO conversion. Char- acterization of the prepared MnOx/UiO-66 catalysts showed that the catalysts had the crystal structure and porosity of the UiO-66 carrier and that the manganese particles were well-distributed on the surface of the catalyst. X-ray photoelectron spectroscopy analysis showed that there are strong interactions between the MnOx and the Zr oxide secondary building units of the UiO-66 which has a positive effect on the catalytic activity. The 8.5 wt-% MnOx catalyst maintained excellent activity during a 24-h stability test and exhibited good resistance to SO2 poisoning.

关键词： metal-organic framework selective catalyticreduction manganese oxides deNOx SO2 resistance

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Application status and comparison of dioxin removal technologies for iron ore sintering process

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Journal of Iron and Steel Research International 2018年第4期25卷 357-365页

作者： Hong-ming Long Qi Shi Hong-liang Zhang Ru-fei Wei Tie-jun Chun Jia-xin Li Key Laboratory of Metallurgical Emission Reduction & Resources Recycling Ministry of Education Anhui University of Technology Ma'anshan 243002 Anhui China School of Metallurgical Engineering Anhui University of Technology Ma'anshan 243002 Anhui China

The emission of dioxins from the iron ore sintering process is the largest emission source of dioxins, and the reduction in dioxin emission from the iron ore sintering process to the environment is increasingly important. Three approaches to control the emission of dioxins were reviewed： source control, process control, and terminal control. Among them, two terminal control technologies, activated carbon adsorption and selective reduction technology, were discussed in detail. Following a comparison of the reduction technologies, the terminal control method was indicated as the key technology to achieve good control of dioxins during the sintering process. For the technical characteristics of the sintering process and flue gas, multiple methods should be collectively considered, and the most suitable method may be addition of inhibitors ＋ ultra-clean dust collection （electrostatic precipitation/bag filter）＋ desulphurization ＋ selective catalytic reduction to sufficiently remove multiple pollutants, which provides a direction for the cooperative disposal of flue gas pollutants in future.

关键词： Iron ore sintering process Dioxins Removal technology Activated carbon adsorption selective catalyticreduction

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