NO adsorption behaviors of the MnOx catalysts in lean-burn atmospheres
文献类型：期刊论文
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| 作者 | Guo, L; Xian, H; Li, QF; Chen, D; Tan, YS; Zhang, J; Zheng, LR; Li, XG;张静; Zheng LR(郑黎荣)
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| 刊名 | JOURNAL OF HAZARDOUS MATERIALS
 ; JOURNAL OF HAZARDOUS MATERIALS
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| 出版日期 | 2013 ; 2013 |
| 卷号 | 260页码:543-551 |
| 关键词 | Manganese oxides Nitrogen oxides Adsorption Lean-burn Desorption Manganese oxides Nitrogen oxides Adsorption Lean-burn Desorption |
| ISSN号 | 0304-3894 |
| DOI | 10.1016/j.jhazmat.2013.06.013 |
| 英文摘要 | NOx emission control of lean-burn engines is one of the great challenges in the world. Herein, the MnOx model catalysts with the different calcination temperatures were synthesized to investigate their NO adsorbability for lean-burn exhausts. The transformation from (beta-)MnO2 to (alpha-)Mn2O3 following the increased calcination temperatures was evidenced from the viewpoint of the local atomic level. Among these samples, the one calcined at 550 degrees C containing the single alpha-Mn2O3 phase displayed the best NO adsorbability: NO was mainly adsorbed in the forms of NO/nitrites and NO2/nitrates at the low and high temperatures, respectively; the NO oxidation ability displayed the volcano-shape following the increased operating temperatures, and reached the maximum, i.e. 92.4% of the NO-to-NO2 conversion, at 250 degrees C. Moreover, this sample presented the efficiently reversible NO adsorption/desorption performance in alternative lean-burn/fuel-rich atmospheres, due to the weakly bonded NO on it. The superficial oxygen species plays a critical role for the NO oxidation over alpha-Mn2O3. The consumed superficial oxygen could be further compensated by the gaseous and lattice oxygen therein. Our findings show that the alpha-Mn2O3 material is a promising NOx adsorber for lean-burn exhausts even at low operating temperatures. (C) 2013 Elsevier B.V. All rights reserved.; NOx emission control of lean-burn engines is one of the great challenges in the world. Herein, the MnOx model catalysts with the different calcination temperatures were synthesized to investigate their NO adsorbability for lean-burn exhausts. The transformation from (beta-)MnO2 to (alpha-)Mn2O3 following the increased calcination temperatures was evidenced from the viewpoint of the local atomic level. Among these samples, the one calcined at 550 degrees C containing the single alpha-Mn2O3 phase displayed the best NO adsorbability: NO was mainly adsorbed in the forms of NO/nitrites and NO2/nitrates at the low and high temperatures, respectively; the NO oxidation ability displayed the volcano-shape following the increased operating temperatures, and reached the maximum, i.e. 92.4% of the NO-to-NO2 conversion, at 250 degrees C. Moreover, this sample presented the efficiently reversible NO adsorption/desorption performance in alternative lean-burn/fuel-rich atmospheres, due to the weakly bonded NO on it. The superficial oxygen species plays a critical role for the NO oxidation over alpha-Mn2O3. The consumed superficial oxygen could be further compensated by the gaseous and lattice oxygen therein. Our findings show that the alpha-Mn2O3 material is a promising NOx adsorber for lean-burn exhausts even at low operating temperatures. (C) 2013 Elsevier B.V. All rights reserved. |
| 学科主题 | Engineering; Environmental Sciences & Ecology ; Engineering; Environmental Sciences & Ecology |
| 收录类别 | SCI |
| 电子版国际标准刊号 | 1873-3336 |
| 语种 | 英语 |
| WOS记录号 | WOS:000324563500066 ; WOS:000324563500066 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/224012]  |
| 专题 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Guo, L,Xian, H,Li, QF,et al. NO adsorption behaviors of the MnOx catalysts in lean-burn atmospheres, NO adsorption behaviors of the MnOx catalysts in lean-burn atmospheres[J]. JOURNAL OF HAZARDOUS MATERIALS, JOURNAL OF HAZARDOUS MATERIALS,2013, 2013,260, 260:543-551, 543-551. |
| APA | Guo, L.,Xian, H.,Li, QF.,Chen, D.,Tan, YS.,...&郑黎荣.(2013).NO adsorption behaviors of the MnOx catalysts in lean-burn atmospheres.JOURNAL OF HAZARDOUS MATERIALS,260,543-551. |
| MLA | Guo, L,et al."NO adsorption behaviors of the MnOx catalysts in lean-burn atmospheres".JOURNAL OF HAZARDOUS MATERIALS 260(2013):543-551. |
入库方式： OAI收割
来源：高能物理研究所
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