| DOI: | 10.1016/j.atmosenv.2014.12.063
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| Scopus记录号: | 2-s2.0-84920934020
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| 论文题名: | Vanadium and tungsten release from V-based selective catalytic reduction diesel aftertreatment |
| 作者: | Liu Z; G; , Ottinger N; A; , Cremeens C; M
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| 刊名: | Atmospheric Environment
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| ISSN: | 0168-2563
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| EISSN: | 1573-515X
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| 出版年: | 2015
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| 卷: | 104 | | 起始页码: | 154
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| 结束页码: | 161
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| 语种: | 英语
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| 英文关键词: | Diesel exhaust aftertreatment
; Environmental toxicity
; SCR
; Tungsten
; Vanadium
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| Scopus关键词: | Catalyst poisoning
; Catalysts
; Engines
; Nitrogen oxides
; Reduction
; Temperature distribution
; Thyristors
; Toxicity
; Tungsten
; Tungsten compounds
; Vanadium
; Vanadium alloys
; Vanadium compounds
; Diesel aftertreatment
; Diesel exhausts
; Environmental toxicity
; Hydrocarbon emission
; Maximum temperature
; Release measurements
; Temperature dependence
; Thermal durability
; Selective catalytic reduction
; metal
; tungsten
; vanadium
; catalysis
; catalyst
; data set
; diesel engine
; emission control
; exhaust emission
; hydrocarbon
; measurement method
; nitrogen oxides
; temperature effect
; toxicity
; tungsten
; vanadium
; volatilization
; Article
; atmosphere
; catalyst
; diesel engine
; environmental protection
; environmental toxicity
; exhaust gas
; high temperature
; low temperature
; measurement
; priority journal
; qualitative analysis
; reactor
; reduction
; thermostability
; toxicity
; vapor
; United States
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| Scopus学科分类: | Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
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| 英文摘要: | Vanadium-based selective catalytic reduction (V-SCR) catalysts are currently used for the reduction of nitrogen oxides (NOx) in worldwide diesel applications including Euro IV, V, and VI as well as U.S. nonroad Tier 4 Final. Although V-SCR catalysts are attractive because of their high NOx conversion, low cost, resistance to sulfur poisoning, and ability to reduce hydrocarbon emissions, there is concern that V-SCR washcoat material (e.g., vanadium and tungsten) and its derivatives may be released into the atmosphere, potentially harming human health and the environment. In this study, vanadium and tungsten release measurements are made with both a reactor- and engine-based approach in order to determine the potential release of these metals from diesel exhaust aftertreatment systems that contain a V-SCR catalyst. Results for a commercially available V-SCR reveal that both V and W release begin at 500°C, and both reactor- and engine-based methods are capable of measuring qualitatively similar release. Emissions with the engine-based method are higher at all temperatures evaluated, likely due to this method's ability to capture particle-phase and vapor-phase emissions which become particle-bound after their evolution from the catalyst surface. Certification relevant data (NRTC and NRSC) from a nonroad engine is used to understand probable emissions from V-SCR aftertreatment architectures. Finally, results from a V-SCR catalyst formulated for improved thermal durability illustrate that it is possible to increase the maximum temperature for V-SCR catalysts. This comprehensive understanding of the temperature dependence of vanadium and tungsten volatility can be used to further analyze the full impact of diesel aftertreatment on exhaust emissions and their impact on human health and environmental toxicity. © 2015 Elsevier Ltd. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/81956
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| Appears in Collections: | 气候变化事实与影响
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作者单位: | Cummins Inc., United States
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| Recommended Citation: | |
Liu Z,G,, Ottinger N,et al. Vanadium and tungsten release from V-based selective catalytic reduction diesel aftertreatment[J]. Atmospheric Environment,2015-01-01,104
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