搜索结果: 1-15 共查到“知识库 理学 NOx”相关记录95条 . 查询时间(0.14 秒)
Cu-SAPO-18催化剂氨选择性催化还原NOx钾中毒机理的研究
Cu-SAPO-18 钾中毒 水热老化 Eley-Rideal反应机理 Langmuir-Hinshelwood反应机理
2022/3/23
研究了不同水热老化温度对钾(K)中毒0.4K-Cu-SAPO-18样品的结构及其NH3-SCR(NH3作为还原剂的选择性还原技术)催化活性的影响. 结果表明, K中毒对样品结构影响较小, 但明显降低了其NH3-SCR性能, 在350 ℃ 时, K中毒样品0.4K-Cu-SAPO-18的NO转化率为65.88%, 明显低于未中毒Cu-SAPO-18样品的90.85%. 水热老化温度明显影响催化剂的结...
为了解碱金属离子对煤热利用过程中NOx污染物形成的影响，针对煤中含氮模型化合物吡咯，在吡咯常规非催化热解机理的研究基础上，采用密度泛函理论B3LYP/6-31+G(d,p)方法，研究了碱金属离子(Na+,K+)对吡咯催化热解反应机理和路径的影响。结果表明，碱金属离子能显著促进吡咯热解生成HCN路径中的内部氢转移反应、协同开环反应和协同裂解反应的发生，但对分子异构化反应的影响较小。Na+和K+ 均能...
Photochemical grid model implementation and application of VOC, NOx, and O3 source apportionment
model implementation application
2015/3/5
. For the purposes of developing optimal emissions
control strategies, efficient approaches are needed to identify the major sources or groups of sources that contribute to
elevated ozone (O3/...
采用浸渍法制备了一系列不同Fe/V比例的Fe-V/TiO2催化剂，考察了催化剂在模拟柴油车尾气中催化还原NOx的催化性能，采用TG、XRD、H2-TPR、NH3-TPD和Raman光谱对催化剂进行了表征。结果表明，当Fe引入后，能显著降低V2O5在高温下的挥发，减轻了钒系催化剂在移动源的生物毒性危害。其中，Fe/V比为1：1（Fe1-V1/TiO2）的催化剂形成了FeVO4活性中心，表现出最好的催...
Comparison of α1-Antitrypsin, α1-Acid Glycoprotein, Fibrinogen and NOx as Indicator of Subclinical Mastitis in Riverine Buffalo (Bubalus bubalis)
Acute Phase Proteins Nitric Oxide Subclinical Mastitis and Buffalo
2016/5/11
Mastitis set apart as clinical and sub clinical is a disease complex of dairy cattle, with sub clinical being the most important economically. Of late, laboratories showed interest in developing bioch...
生物法同时脱除高温烟气中SO2和NOx的实验研究
生物膜填料塔 高温烟气 脱硫脱氮 操作条件
2012/11/5
对采用生物膜填料塔处理高温烟气中的SO2和NOx进行了实验研究,结果表明,生物膜填料塔能够有效地同时去除高温烟气中的SO2和NOx.在65 ℃,循环液流量4.0~7.0 L/h,pH=1.5,停留时间150 s,SO2进气质量浓度2 000~3 000 mg/m3,NOx进气质量浓度500~1 000 mg/m3的操作条件下,生物膜填料塔对SO2的去除率可达99.9%以上,对NOx的去除率为60....
利用1992年9月～2005年8月的HALOE资料,对我国低纬高原地区上空平流层中NOx,O3等大气痕量气体的混合比垂直变化进行了研究,并对本区域不同高度上NOx混合比与全球同纬度进行了比较,同时对NOx随时间的演变特征,NOx的变化周期及NOx与O3的相关关系进行了分析.结果表明:①NOx,O3混合比先随高度增加,到极值时又逐渐减小;在极值高度上,各个季节NOx,O3的混合比值都是夏季最高,冬季...
Global modeling of organic aerosol: the importance of reactive nitrogen (NOx and NO3)
organic aerosol reactive nitrogen (NOx and NO3)
2010/12/20
Reactive nitrogen compounds, specifically NOx and NO3, likely influence global organic aerosol levels. To assess these interactions, GEOS-Chem, a chemical transport model, is updated to include improv...
Direct satellite observation of lightning-produced NOx
Direct satellite observation lightning-produced NOx
2010/11/30
In this study we present a systematic analysis of NO2 column densities from SCIAMACHY measurements over active thunderstorms, as detected by the World-Wide Lightning Location Network (WWLLN), where th...
NOx and O3 above a tropical rainforest: an analysis with a global and box model
a tropical rainforest a global and box model NOx O3
2010/11/30
A cross-platform field campaign, OP3, was conducted in the state of Sabah in Malaysian Borneo between April and July of 2008. Among the suite of observations recorded, the campaign included measuremen...
Coupling of HOx, NOx and halogen chemistry in the antarctic boundary layer
HOx, NOx and halogen chemistry the antarctic boundary layer
2010/11/3
A modelling study of radical chemistry in the coastal Antarctic boundary layer, based upon observations performed in the course of the CHABLIS (Chemistry of the Antarctic Boundary Layer and the Interf...
HOx observations over West Africa during AMMA: impact of isoprene and NOx
HOx observations West Africa AMMA isoprene NOx
2010/10/11
Aircraft OH and HO2 measurements made over West Africa during the AMMA field campaign in summer 2006 have been investigated using a box model constrained to observations of long-lived species and phys...
Multi-annual changes of NOx emissions in megacity regions: nonlinear trend analysis of satellite measurement based estimates
NOx emissions megacity regions nonlinear trend analysis satellite measurement
2010/9/21
Hazardous impact of air pollutant emissions from megacities on atmospheric composition on regional and global scales is currently an important issue in atmospheric research. However, the quantificatio...
Role of aldehyde chemistry and NOx concentrations in secondary organic aerosol formation
aldehyde chemistry NOx concentrations secondary organic aerosol formation
2010/8/16
Aldehydes are an important class of products from atmospheric oxidation of hydrocarbons. Isoprene (2-methyl-1,3-butadiene), the most abundantly emitted atmospheric non-methane hydrocarbon, produces a ...
Modeling the regional impact of ship emissions on NOx and ozone levels over the Eastern Atlantic and Western Europe using ship plume parameterization
ship emissions NOx ozone levels the Eastern Atlantic Western Europe ship plume parameterization
2010/8/16
In general, regional and global chemistry transport models apply instantaneous mixing of emissions into the model's finest resolved scale. In case of a concentrated source, this could result in errone...