Enhanced Oxygen Vacancies in a Two-Dimensional MnAl-Layered Double Oxide Prepared via Flash Nanoprecipitation Offers High Selective Catalytic Reduction of NOx with NH3
Abstract
:1. Introduction
2. Materials and Methods
2.1. Catalyst Preparation
2.2. Material Characterization
2.3. Activity Measurement
3. Results and Discussion
4. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Samples | BET Surface Area (m2/g) | Pore Volume (cm3/g) | Pore Size (nm) |
---|---|---|---|
MnAl-LDO (CP) | 169 | 0.37 | 8.77 |
MnAl-LDO (FNP) | 121 | 0.22 | 7.13 |
Samples | Surface Atomic Concentration (%) | ||||||||
---|---|---|---|---|---|---|---|---|---|
Al | Mn | O | Mn2+/Mn | Mn3+/Mn | Mn4+/Mn | Olatt | Oads | Osurf | |
MnAl-LDO (CP) | 22.88 | 9.56 | 57.24 | 34.9 | 41.6 | 23.5 | 30.42 | 35.32 | 34.26 |
MnAl-LDO (FNP) | 21.66 | 9.28 | 56.35 | 31.8 | 41.4 | 26.8 | 35.44 | 40.57 | 23.99 |
Mn-Based Catalysts | Synthesis Methods | Temperature (°C) | GHSV (h−1) | NO Content (ppm) | Conversion | Ref. |
---|---|---|---|---|---|---|
Mn/γ-Al2O3 | Impregnation | 200 | - | 500 | NOx: 67.2% | [14] |
Cu-Mn/γ-Al2O3 | Impregnation | 200 | - | 500 | NOx: 82.6% | [14] |
Mn-Fe/VMT | Impregnation | 200 | 30,000 | 500 | NO: 96.5% | [12] |
Cu2Mn0.5Al0.5Ox | Co-precipitation | 150 | - | 500 | NOx: 91.2% | [10] |
Mn-Ce-Al (MMO) | Spray drying | 150 | 15,000 | 500 | NOx: 97.4% | [20] |
Mn–Ce/γ-Al2O3 | Sol-gel | 300 | 30,000 | 700 | NO: 85% | [41] |
40 wt %Mn0.75Fe0.25/Al2O3 | Deposition precipitation | 150 | - | 1000 | NO: 71% | [44] |
MnOx-CeO2-Al2O3 | Flash-nanoprecipitation | 150 | 15,300 | 500 | NOx: 90% | [30] |
MnAl-LDO (CP) | Co-precipitation | 200 | 60,000 | 500 | NO: 74.68% | This work |
MnAl-LDO (FNP) | Flash-nanoprecipitation | 200 | 60,000 | 500 | NO: 100% | This work |
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Zhao, D.; Wang, C.; Yu, F.; Shi, Y.; Cao, P.; Dan, J.; Chen, K.; Lv, Y.; Guo, X.; Dai, B. Enhanced Oxygen Vacancies in a Two-Dimensional MnAl-Layered Double Oxide Prepared via Flash Nanoprecipitation Offers High Selective Catalytic Reduction of NOx with NH3. Nanomaterials 2018, 8, 620. https://doi.org/10.3390/nano8080620
Zhao D, Wang C, Yu F, Shi Y, Cao P, Dan J, Chen K, Lv Y, Guo X, Dai B. Enhanced Oxygen Vacancies in a Two-Dimensional MnAl-Layered Double Oxide Prepared via Flash Nanoprecipitation Offers High Selective Catalytic Reduction of NOx with NH3. Nanomaterials. 2018; 8(8):620. https://doi.org/10.3390/nano8080620
Chicago/Turabian StyleZhao, Dan, Chao Wang, Feng Yu, Yulin Shi, Peng Cao, Jianming Dan, Kai Chen, Yin Lv, Xuhong Guo, and Bin Dai. 2018. "Enhanced Oxygen Vacancies in a Two-Dimensional MnAl-Layered Double Oxide Prepared via Flash Nanoprecipitation Offers High Selective Catalytic Reduction of NOx with NH3" Nanomaterials 8, no. 8: 620. https://doi.org/10.3390/nano8080620