Microspherical MnO2-CeO2-Al2O3 mixed oxide for monolithic honeycomb catalyst and application in selective catalytic reduction of NOx with NH3 at 50–150 °C

Wang, Chao; Ye, Feng; Zhu, Mingyuan; Wang, Xugen; Dan, Jianming; Zhang, Jinli; Cao, Ping; Dai, Bin

doi:10.1016/j.cej.2018.04.033

Cited by 62 publications

(29 citation statements)

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“…After application in flue gas treatment, it was found that the monolith catalyst still maintained good catalytic activity. Wang et al [159] first designed and prepared spherical MnO x -CeO 2 -Al 2 O 3 powder catalysts by spray drying, then applied it to monolith honeycomb catalysts(MHC). Compared with the same metal oxides catalysts prepared by coprecipitation (CP-MHC), the spray-drying (SD-MHC) method exhibited excellent SCR denitrification performance at 50-150 • C (Figure 11d,e).…”

Section: Nh 3 -Scrmentioning

confidence: 99%

“…Compared with the same metal oxides catalysts prepared by coprecipitation (CP-MHC), the spray-drying (SD-MHC) method exhibited excellent SCR denitrification performance at 50-150 °C (Figure 11d,e). [159]. Reproduced from Ref.…”

Section: Nh 3 -Scrmentioning

confidence: 99%

“…(b) Room temperature De-NO x via NH 3 -SCR. (c) Luo's process for treating CO, NO x , and SO x[159]. Reproduced from Ref [159],.…”

mentioning

confidence: 99%

“…(a) The SEM image of nanoporous microspheres Mn-Ce-Fe-Ti mixed oxide catalysts, (b) focused ion beam (FIB) images and (c) SEM image of nanoporous microspheres Mn-Ce-Fe-Ti [185], (d) SEM images of MnO x -CeO 2 -Al 2 O 3 (CP-MHC), and (e) MnO x -CeO 2 -Al 2 O 3 (SD-MHC)[159]. Reproduced from Ref [159],. Copyright 2018, Elsevier.…”

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confidence: 99%

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A Critical Review of Recent Progress and Perspective in Practical Denitration Application

Liu

et al. 2019

Catalysts

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Nitrogen oxides (NO x ) represent one of the main sources of haze and pollution of the atmosphere as well as the causes of photochemical smog and acid rain. Furthermore, it poses a serious threat to human health. With the increasing emission of NO x , it is urgent to control NO x . According to the different mechanisms of NO x removal methods, this paper elaborated on the adsorption method represented by activated carbon adsorption, analyzed the oxidation method represented by Fenton oxidation, discussed the reduction method represented by selective catalytic reduction, and summarized the plasma method represented by plasma-modified catalyst to remove NO x . At the same time, the current research status and existing problems of different NO x removal technologies were revealed and the future development prospects were forecasted.Catalysts 2019, 9, 771 2 of 39 adsorption, oxidation, reduction, and plasma methods. In view of these attentive findings, adsorption method uses recyclable solid adsorbent material to adsorb NO x from flue gas through microporous structure, remarkably, environmentally friendly, no secondary pollution, and energy-saving and -efficient features make it stand out [18][19][20]. The oxidation process is a method that oxidizes NO into NO 2 or N 2 O 3 with high solubility under the action of an oxidant that is then absorbed by water or alkali solution. The process is simple and cost-saving, and is widely used in the wet flue gas denitrification process with relatively low cost and high removal efficiency of NO x ; except that the oxidized NO and SO 2 can be removed simultaneously to produce high value-added products [21][22][23]. The reduction method has the characteristics of high efficiency, cleanliness, and mildness; NO x removal can be realized at low temperature at present [24][25][26]. The plasma method is used to modify the surface of the catalyst, the dispersion of active species can be improved by plasma treatment, and the stability and low temperature activity of catalyst can be improved [27,28].Seldom, if ever, does a comprehensive article to introduce the current situation and treatment methods of removing NO x . In this paper, we tried to renovate, classify, and summarize the significant perspectives and most relevant findings reported in recent research articles and earlier reviews generalizing the mechanism analysis and research progress of NO x removal by adsorption, oxidation, reduction, and plasma methods, which can provide means for promoting the technological progress of pollution prevention, maintaining healthy development of factories continuously, studying the methods of removing NO x deeply, and mastering different technologies of removing NO x , as well as providing guidance for controlling the emission of NO x from motor vehicles such as diesel, gasoline, and so on. In order to improve the environmental quality and save the ecological environment, this paper further provides a convenient, low-cost, efficient, and economic guidance line.

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Section: Nh 3 -Scrmentioning

confidence: 99%

Section: Nh 3 -Scrmentioning

confidence: 99%

“…(b) Room temperature De-NO x via NH 3 -SCR. (c) Luo's process for treating CO, NO x , and SO x[159]. Reproduced from Ref [159],.…”

mentioning

confidence: 99%

mentioning

confidence: 99%

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A Critical Review of Recent Progress and Perspective in Practical Denitration Application

Liu

et al. 2019

Catalysts

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“…Many reports have described the fine preparation processes to control the morphology, structure, and even the crystal configuration of the catalysts. Novel synthetic methods include co-precipitation [16], hydrothermal procedure [17], the supercritical antisolvent process [18], ion-exchange wet impregnation [19], spray drying [20], and self-propagating high-temperature synthesis [21]. …”

Section: Introductionmentioning

confidence: 99%

Enhanced Oxygen Vacancies in a Two-Dimensional MnAl-Layered Double Oxide Prepared via Flash Nanoprecipitation Offers High Selective Catalytic Reduction of NOx with NH3

Zhao

Wang

et al. 2018

Nanomaterials

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A two-dimensional MnAl-layered double oxide (LDO) was obtained by flash nanoprecipitation method (FNP) and used for the selective catalytic reduction of NOx with NH3. The MnAl-LDO (FNP) catalyst formed a particle size of 114.9 nm. Further characterization exhibited rich oxygen vacancies and strong redox property to promote the catalytic activity at low temperature. The MnAl-LDO (FNP) catalyst performed excellent NO conversion above 80% at the temperature range of 100–400 °C, and N2 selectivity above 90% below 200 °C, with a gas hourly space velocity (GHSV) of 60,000 h−1, and a NO concentration of 500 ppm. The maximum NO conversion is 100% at 200 °C; when the temperature in 150–250 °C, the NO conversion can also reach 95%. The remarkable low-temperature catalytic performance of the MnAl-LDO (FNP) catalyst presented potential applications for controlling NO emissions on the account of the presentation of oxygen vacancies.

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MnO₂‐Based Materials for Environmental Applications

et al. 2021

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Manganese dioxide (MnO2) is a promising photo–thermo–electric‐responsive semiconductor material for environmental applications, owing to its various favorable properties. However, the unsatisfactory environmental purification efficiency of this material has limited its further applications. Fortunately, in the last few years, significant efforts have been undertaken for improving the environmental purification efficiency of this material and understanding its underlying mechanism. Here, the aim is to summarize the recent experimental and computational research progress in the modification of MnO2 single species by morphology control, structure construction, facet engineering, and element doping. Moreover, the design and fabrication of MnO2‐based composites via the construction of homojunctions and MnO2/semiconductor/conductor binary/ternary heterojunctions is discussed. Their applications in environmental purification systems, either as an adsorbent material for removing heavy metals, dyes, and microwave (MW) pollution, or as a thermal catalyst, photocatalyst, and electrocatalyst for the degradation of pollutants (water and gas, organic and inorganic) are also highlighted. Finally, the research gaps are summarized and a perspective on the challenges and the direction of future research in nanostructured MnO2‐based materials in the field of environmental applications is presented. Therefore, basic guidance for rational design and fabrication of high‐efficiency MnO2‐based materials for comprehensive environmental applications is provided.

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Microspherical MnO2-CeO2-Al2O3 mixed oxide for monolithic honeycomb catalyst and application in selective catalytic reduction of NOx with NH3 at 50–150 °C

Cited by 62 publications

References 58 publications

A Critical Review of Recent Progress and Perspective in Practical Denitration Application

A Critical Review of Recent Progress and Perspective in Practical Denitration Application

Enhanced Oxygen Vacancies in a Two-Dimensional MnAl-Layered Double Oxide Prepared via Flash Nanoprecipitation Offers High Selective Catalytic Reduction of NOx with NH3

MnO₂‐Based Materials for Environmental Applications

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Microspherical MnO2-CeO2-Al2O3 mixed oxide for monolithic honeycomb catalyst and application in selective catalytic reduction of NOx with NH3 at 50–150 °C

Cited by 62 publications

References 58 publications

A Critical Review of Recent Progress and Perspective in Practical Denitration Application

A Critical Review of Recent Progress and Perspective in Practical Denitration Application

Enhanced Oxygen Vacancies in a Two-Dimensional MnAl-Layered Double Oxide Prepared via Flash Nanoprecipitation Offers High Selective Catalytic Reduction of NOx with NH3

MnO2‐Based Materials for Environmental Applications

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Microspherical MnO2-CeO2-Al2O3 mixed oxide for monolithic honeycomb catalyst and application in selective catalytic reduction of NOx with NH3 at 50–150 °C

MnO₂‐Based Materials for Environmental Applications