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Showing 1 to 20 of 146 for “"nitrogen oxides"”.
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Biomass reburning for control of nitrogen oxides
<p>Fuel-Lean Gas Reburning(TM) (FLGR) is a method of controlling NO x emissions produced during coal combustion in utility boilers by injecting natural gas into the boiler downstream of the primary combustion zone. Whereas traditional reburning requires 10%--20% of the total energy input from the …
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Preparation and Cycloaddition Reactions of Oxazoline Nitrogen Oxides
Oxazoline N-oxides have been prepared in medium to high yields under mild conditions by condensation of 2-(hydroxyamino)-2-methyl-1-propanol with ortho esters or amide acetals. 3 + 2 Cycloaddition reactions of the oxazoline N-oxides and the related pyrroline N-oxides with phenyl isocyanate, …
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Air quality analysis of nitrogen oxides and relationships with ozone pollution
… in the air in high enough concentrations. Nitrogen oxides (NOx), especially nitrogen dioxide (NO₂), are increasingly of concern due to the environmental and health problems they cause. This reviews the recent literature on the reasons and impacts of NOx pollution as well as ozone pollution …
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Estimating source strengths and lifetime of Nitrogen Oxides from satellite data
… significantly due to anthropogenic emissions. Nitrogen oxides (NO+NO2) play an important part, as they directly affect human health and environment, and are involved in chemical key reactions, leading to ozone production in the troposphere. Spectral measurements from satellite platforms of the …
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Theoretical Study on the Mechanism of Removing Nitrogen Oxides using Isocyanic Acid.
… reactions - RAPid REduction of Nitrogen Oxides using Isocyanic acid - proposed by Robert A. Perry<sup>1</sup> in an attempt to help control the emission of nitrogen oxides pollutant into the atmosphere, has been re-investigated theoretically. The study of reaction mechanisms was …
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Impact of Water Injection on Emissions of Nitrogen Oxides from Aircraft Engines
Aircraft NOₓ emissions form as a result of high-temperature combustion in the engine, and they lead to negative climate and air quality impacts. These emissions increase with temperature, so a NOₓ reduction technique has been proposed where water is injected in different regions of a gas turbine …
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Cost effective strategies for nitrogen oxides reduction : ozone attainment policy for New England
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1996.
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Sensing, Actuation, and Embedded Control for a Custom SCR Nitrogen Oxides Emissions Reduction System
… include harmful gasses like carbon monoxide, nitrogen oxides and particulate matter. Selective Catalytic Reduction (SCR) systems have long been used to reduce diesel emissions from medium to heavy-duty diesel engines. Primary focus of this research effort is the implementation and improvement …
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Turbulent Exchange of Ozone and Nitrogen Oxides between an Amazonian Rain Forest and the Atmosphere
… the deposition of constituents like ozone and nitrogen oxides, which are of high relevance for tropospheric chemistry. To asses the effect of land use change on tropospheric chemistry, a good knowledge of the exchange of those trace gases between the primary rain forest ecosystem and the …
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Synthesis and characterization of micro- and mesoporous materials for low temperature selective catalytic reduction of nitrogen oxides
In summary, it has been shown during this study that bimetallic Fe and Mn containing catalysts can be prepared by wet impregnation and not by ion exchange because of the competition between two different metals at different oxidation number. Only a single metallic phase catalyst could be prepared …
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Effects Of Transport Properties And Flame Unsteadiness On Nitrogen Oxides Emissions From Laminar Hydrogen Jet Diffusion Flames
Experimental studies on the coupled effects of transport properties and unsteady fluid dynamics have been conducted on laminar, acoustically forced, hydrogen jet diffusion flames diluted by argon and helium. The primary purpose of this research is to determine how the fuel Lewis number and the flow …
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Time and place specific policies for controlling ozone precursor nitrogen oxides in New England's electric power sector
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1994.
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Thermochemistry reaction paths and oxidation kinetics on ketonyl and aldehydic nitrogen oxides, propene and isooctane: a theoretical study
Thermochemical properties for several atmospheric and combustion related species are determined using computational chemical methods coupled with fundamentals of thermodynamics and statistical mechanics. Enthalpies of formation ([Delta]H_f _{298}) are determined using isodesmic reaction analysis at …
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Simultaneous collection of sulfur dioxide and nitrogen oxides via spray drying: Using sodium-based and calcium-based sorbents with select additives
Several inorganic compounds including deliquescent compounds, catalysts, and an oxidant were added to the spray-dryer sorbents to evaluate their influence on the removal efficiencies of contaminant gases in a spray dryer. Two preliminary studies were conducted before the removal-efficiency tests. …
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Phosphine Based Fluorescent Probes for Nitroxyl Detection and Their Reactivity Toward S-Nitrosothiols
Nitrogen oxides are a unique class of molecules with profound physiology. Nitric
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