Preparation of MnO2@CeO2 core–shell catalyst and its application in SCO denitration performance

Zhang, Lei; Han, Zhikun; Yang, Jia; Han, Yibo

doi:10.1007/s00339-022-05543-8

Cited by 7 publications

(4 citation statements)

References 34 publications

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“…9a showed the electron orbital arrangement of ozone. Its structure is unstable and has the characteristics of electrophilic, nucleophilic and dipolar, hence its properties are active and its reactivity is strong [20]. When the electron energy is higher than the chemical bond energy of the pollutant, the direct collision of the high-energy electrons with the pollutant leads to the breaking of the chemical bond.…”

Section: Gas Phase Reactionmentioning

confidence: 99%

Research on the Mechanism of Synergistic Treatment of Vocs-O3 By Low Temperature Plasma Catalysis Technology

Zhuorui¹,

Zhang²,

Jia

2023

Preprint

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Section: Gas Phase Reactionmentioning

confidence: 99%

Research on the Mechanism of Synergistic Treatment of Vocs-O3 By Low Temperature Plasma Catalysis Technology

Zhuorui¹,

Zhang²,

Jia

2023

Preprint

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“…However, the flue gas temperature in the non-power industry is low, and the existing mature SCR denitration technology cannot completely control NO x . [11][12] At present, commercial industrial flue gas denitration catalysts are mainly of vanadium titanium type. These have high NH 3 -SCR catalytic activity at 280-450 °C, but the catalysts have high toxicity and poor sulfur resistance.…”

Section: Introductionmentioning

confidence: 99%

“…After improvement and development, highly active commercial SCR catalysts have been effectively applied in industrial production. However, the flue gas temperature in the non‐power industry is low, and the existing mature SCR denitration technology cannot completely control NO x 11‐12 …”

Section: Introductionmentioning

confidence: 99%

Effect of bimetallic modification on blast furnace slag and its application in low‐temperature selective catalytic reduction

Zhang

Han

Hao

et al. 2023

J of Chemical Tech & Biotech

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Objective In order to control NOx in low‐temperature flue gases emitted from non‐power industries and to reduce the preparation cost of denitration catalysts, this study uses inexpensive blast furnace slag as raw material to prepare denitration catalysts. Methods After cooling, drying and grinding, the blast furnace slag becomes a powder with considerable fineness and meets the requirements of activity index, which is called GGBS (ground granulated blast furnace slag). Using GGBS as denitration catalyst carrier, the active components M (M = Fe, Co, Ni, Cu and Ce) are loaded on Mn‐based GGBS catalyst using an impregnation method. Conclusions The effect of different active components on the denitration performance and sulfur resistance of Mn‐based GGBS catalysts is investigated. The results show that the Mn‐Ce/GGBS catalyst has better denitration performance and sulfur resistance. The Mn‐Ce/GGBS catalyst has a significant denitration performance when load ratio is 2:1. The active component Ce improves the denitration performance of the catalyst, reduces sulfur poisoning and extends the life of the catalyst. The SO2 in the flue gas increases the acid sites on the catalyst surface and improves catalyst activity. The larger the ratios of Mn4+/Mn3+, Ce4+/Ce3+ and Oα/Oβ, the stronger the catalyst activity and the better the denitration performance. © 2022 Society of Chemical Industry (SCI).

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“…Selective catalytic oxidation (SCO) is regarded as a key step for NO removal, which is conducive to improve the catalytic activity of catalysts. When the SCO method is combined with wet absorption by alkaline solution, it can achieve good denitration efficiency [ 3 , 4 ], aiding in nitrogen recovery and utilization. The SCO method has excellent prospects for application in the industry, due to its benefits of non-additional oxidants, low cost, and low secondary pollution.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Oxidation Activity of NO over Mullite-Supported Amorphous Manganese Oxide Catalyst

et al. 2023

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Nitric oxide (NO) can pose a severe threat to human health and the environment. Many catalytic materials that contain noble metals can oxidize NO into NO2. Therefore, the development of a low-cost, earth-abundant, and high-performance catalytic material is essential for NO removal. In this study, mullite whiskers on a micro-scale spherical aggregate support were obtained from high-alumina coal fly ash using an acid–alkali combined extraction method. Microspherical aggregates and Mn(NO3)2 were used as the catalyst support and the precursor, respectively. A mullite-supported amorphous manganese oxide (MSAMO) catalyst was prepared by impregnation and calcination at low temperatures, in which amorphous MnOx is evenly dispersed on the surface and inside of aggregated microsphere support. The MSAMO catalyst, with a hierarchical porous structure, exhibits high catalytic performance for the oxidation of NO. The MSAMO catalyst, with a 5 wt% MnOx loading, presented satisfactory NO catalytic oxidation activity at 250 °C, with an NO conversion rate as high as 88%. Manganese exists in a mixed-valence state in amorphous MnOx, and Mn4+ provides the main active sites. The lattice oxygen and chemisorbed oxygen in amorphous MnOx participate in the catalytic oxidation of NO into NO2. This study provides insights into the effectiveness of catalytic NO removal in practical industrial coal-fired boiler flue gas. The development of high-performance MSAMO catalysts represents an important step towards the production of low-cost, earth-abundant, and easily synthesized catalytic oxidation materials.

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Preparation of MnO2@CeO2 core–shell catalyst and its application in SCO denitration performance

Cited by 7 publications

References 34 publications

Research on the Mechanism of Synergistic Treatment of Vocs-O3 By Low Temperature Plasma Catalysis Technology

Research on the Mechanism of Synergistic Treatment of Vocs-O3 By Low Temperature Plasma Catalysis Technology

Effect of bimetallic modification on blast furnace slag and its application in low‐temperature selective catalytic reduction

Catalytic Oxidation Activity of NO over Mullite-Supported Amorphous Manganese Oxide Catalyst

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