期刊
CHEMOSPHERE
卷 270, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2020.128646
关键词
Low temperature denitration; SCR(Selective catalytic reduction); Fly ash; Catalyst; Solid waste recycling
资金
- National Natural Science Foundation of China [51704230]
- Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Natural Resources in P.R. China [KF2019-7]
- Shannxi Key Research and Development Project [2019ZDLSF05-05-01]
- Open Fund of Shaanxi Key Laboratory of Geological Support for Coal Green Exploitation [DZBZ2020-08]
- Xi'an Science and Technology Plan Project [2019217714GXRC013CG014-GXYD13.4]
- 2019 Shaanxi Provincial Natural Science Basic Research Program Enterprise Joint Fund [2019JL-01]
The study found that using Mn-Ce bimetal loaded simultaneously can achieve the best denitration and sulfur resistance performance. Additionally, when the Mn-Ce ratio is 1:1, the catalyst exhibits the highest denitration efficiency and sulfur resistance.
Nitrogen oxides (NOx) are the main pollutants of air, which mainly come from the combustion of coal and fossil fuels. In this paper, with fly ash used as the catalyst carrier, the effects on the denitration and sulfur resistance of Mn-Ce loading sequence and molar ratio were studied. The catalyst was characterized and analyzed by XRD, XPS, SEM. The results show that when Mn-Ce bimetal is loaded at the same time, Mn ions enter the CeO2 lattice to form a solid solution of Mn-O-Ce fluorite structure, which makes the catalyst has the best denitration and sulfur resistance. The catalyst denitration performance increases first and then decreases with the increase of Mn-Ce molar ratio. When Mn-Ce is 1:1, the denitration efficiency is higher, the total conversion rate of NO is the highest and the deactivation time is the longest, the catalyst is resistant to sulfur performance is also the best. (C) 2020 Published by Elsevier Ltd.
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