nitrogen oxides Articles
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Nitrogen Oxides Reactions in Diesel Oxidation Catalyst
ABSTRACT Two catalyst formulations were tested OII a diesel engine. A Fourier Transform Infrared (FTIR) analyzer was used to measure concentrations of nitric oxide (NO) and nitrogen dioxide (NO2). Other exhaust gas components were measuredby conventional analyzers. The results indicate that nitrogen oxides (NO,) undergo complex chemical reactions in the diesel oxidation catalyst (DOC). The ...
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Electrochemical NO2 gas sensor in NOx pollution control
Background: Nitrogen dioxide gas concentration can be measured by electrochemical NO2 gas sensor. On the one hand, under certain conditions, nitrogen dioxide can combine with hydrocarbons in the air to form photochemical smog. Damage the air quality of the atmosphere environment, seriously harm people’s health, so that people rely on the air environment is polluted. Sulfur oxides and ...
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Nitrogen Oxide Technology Gives American Superconductor an Economical, Environmentally Friendly Treatment Solution
Untitled Document The installation of Bionomic Industries Inc.'s (Mahwah, NJ) innovative ScrubPac™ BIONOxSOLVER abatement system is enabling American Superconductor Corporation to treat the nitrogen oxide (NOx) emissions from a calcination process at its new, high temperature superconductor manufacturing facility (Devens, MA), in a cost-effective, environmentally responsible way. ...
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Some aspects of air pollution in Buenos Aires city
This paper presents three aspects of air pollution in the city of Buenos Aires (Argentina). First, we describe the main features of air pollution climatology in the city: the characteristics of wind flow, atmospheric stability and mixing heights. Then, we present the results of the application of DAUMOD and ISCST3 atmospheric dispersion models to calculate spatial and temporal distributions of ...
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WORM: A new open road line source model for low wind speed conditions
Emission from road traffic constitutes one of the most important sources of air pollution in urban areas. This paper describes a newly developed air pollution dispersion model for open roads and highways called WORM (Weak Wind Open Road Model), and give some results using this model at Nordbysletta, Norway, in the period 1 January 200215 April 2002. Generally, a good correspondence was found ...
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Air pollution at the Bily Kriz mountains in the Czech Republic
An evaluation of air pollution at the Bily Kriz mountains in the Czech Republic is given. Annual daily concentrations of sulphur dioxide (SO2), nitrogen oxides (NOx), particulate matter of size 10 mm (PM10) and ozone (O3) measured in the years 1994–2000 are presented. Air pollution at Bily Kriz is assessed with the reference to the European Union Directives and the standards adopted by the Czech ...
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An operational model for vehicular pollution from a road network
We present a brief review of the mathematical model CAR-FMI (contaminants in the Air from a Road, by the Finnish Meteorological Institute). The model has been developed for regulatory purposes, for predicting dispersion of pollution from a road network. It consists of an emission module, treatment of the meteorological time-series, an atmospheric dispersion module, and statistical analysis of the ...
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Formation of atmospheric nitrate under high Particulate Matter concentration
This study was primarily initiated to understand the consistently moderate levels of nitrogen oxides (NOx) in Indian cities in spite of increasing NOx emissions. The research objective was to understand NO3? formation as a NOx function, and other atmospheric constituents. For this purpose, air quality monitoring was conducted at four locations in Delhi city, India (during October?November, 2000), ...
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Kinetics of forming the nitrogen oxides and other harmful substances in catalytic power plants
In the following paper, the kinetics of forming nitrogen oxides and other harmful substances in catalytic power plants are described. First of all, the equilibrium NOx concentrations are considered. The discrepancy between equilibrium concentrations and real results on NOx in the case of flame combustion are explained by a short duration of fuel-air mixture stay in furnace space. The positive ...
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Project - Denison, Iowa Plant - Chemical Processing
Capacity: 100 mmBTU An energy company owns and operates a combustion process at an ethanol processing facility in Denison, Iowa. The ethanol process combusts exclusively pipeline natural gas to drive a 100 mmBTU heat recovery steam generator (HRSG) for production of steam used in the distilling process. The exhaust gas stream is discharged to the atmosphere and emissions are monitored using a ...
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Nitrogen Oxide Technology gives American Superconductor an economical, environmentally friendly treatment solution
The installation of Bionomic Industries Inc.'s (Mahwah, NJ) innovative ScrubPac. BIONOxSOLVER" abatement system is enabling American Superconductor Corporation to treat the nitrogen oxide (NOx) emissions from a calcination process at its new, high temperature superconductor manufacturing facility (Devens, MA), in a cost-effective, environmentally responsible way. Bionomic Industries' solution ...
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Seasonal evolutions of ozone (O3) and its nitrogen precursors (NO, NO2) in urban Sfax (Tunisia)
Seasonal evolution of ozone (O3) and its nitrogen precursors (NO, NO2) in downtown Sfax (Tunisia) was monitored. Nitrogen oxides are shown to be closely related to local vehicle sources. Seasonal ozone levels, however, are shown to be dependent on regional meteorological conditions. High ozone levels are due to the effect of anticyclones and stratosphere intrusions (cut-off lows). Low levels are ...
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Computational modelling of NOx removal by selective non-catalytic reduction
This paper presents the results of computational kinetic modelling of the removal of nitrogen oxides (NOx) from flue gases by selective non-catalytic reduction (SNCR) process using urea as a reducing agent. CHEMKIN and SENKIN computer codes were used with latest reaction mechanism parameters for simulated conditions in an isothermal plug flow reactor. Flue gas initial conditions were simulated as ...
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An ambient air quality monitoring network for Buenos Aires city
This paper proposes an objective methodology for designing a multi-pollutant urban air-quality monitoring network to detect concentrations greater than reference concentration levels (CL). The network design includes both air quality simulation and an objective analysis based on monitoring tasks. The proposed methodology is applied to the city of Buenos Aires. Pollutants of concern are nitrogen ...
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In the queue for clean air
The National Emissions Ceilings Directive (NECD), adopted in 2001, defines the maximum emissions on a national level for four major air pollutants that have a high impact on human health and the environment. These are: sulphur dioxide, nitrogen oxides, volatile organic compounds and ammonia. The Directive will undergo revision in 2008, which would set new interim air quality targets and related ...
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Project - Flint, Michigan Auto Plant- Automotive Processing
Capacity: 100 kpph An Automotive Power Plant owns and operates three boilers in the powerhouse at their 902 E. Leith Street facility in Flint, Michigan. All three boilers combust exclusively pipeline quality natural gas to generate steam that is used at the site for process and space heating purposes. All three boilers have a rated capacity of 100,000 lbs per hour steam output. The exhaust gas ...
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Comparison and evaluation of the 1 km and 5 km resolution FRAME modelled annual concentrations of nitrogen oxides
The aim of this paper is to compare and evaluate the modelled annual nitrogen oxides (NOx) air concentrations calculated for the same area at two different grid resolutions of 1 km and 5 km. The FRAME model was used for the domains covering Poland. Simulations were performed for the years 2005–2008. The input files for the model were provided separately for both 1 km and 5 km grids, whilst ...
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Air pollution modelling of the Calabrian pine forests withered by the Yatagan thermal power plant, Turkey
The emissions from the chimney of the Yatagan thermal power plant have caused a 3050-hectare forest to wither. Such air pollutants as sulfur dioxide, nitrogen oxides and fly ash are carried towards the Bencikdagi Calabrian pine forests on the prevailing north-east winds. To study these effects, the Q-Basic computer program developed for the Gaussian puff model was used with meteorological data ...
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Atmospheric pollution and mortality. A comparative study between two Latin American cities: Buenos Aires (Argentina) and Santiago (Chile)
This work aims to deepen recent studies on the impact of air pollution on human health in Latin American cities. A time series study has been performed comparing the mortality attributable to atmospheric carbon monoxide (CO) and nitrogen oxides (NOx) in Santiago (Chile) and Buenos Aires (Argentina). Pollution, meteorological and mortality data have been integrated in a general additive model ...
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Flameless Thermal Oxidation For Chlorinated Waste Vent Gas Destruction
Faced with a need to reduce nitrogen oxide (NOx) emission levels, a major gulf-coast chemical plant proactively evaluated several strategies and technologies that could be implemented to maintain compliance, selecting Selas Fluid's Thermatrix flameless thermal oxidation technology. ...
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