nitrogen oxides


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Related to nitrogen oxides: carbon monoxide

nitrogen oxides

[¦nī·trə·jən ′äk‚sīdz]
(inorganic chemistry)
NO x Chemical compounds of nitrogen and oxygen; produced primarily from the combustion of fossil fuels, they contribute to the formation of ground-level ozone.
References in periodicals archive ?
Noxso Corporation is committed to the commercialization of the Noxso Process, a dry process which simultaneously removes over 90 percent of sulfur dioxides and up to 90 percent of nitrogen oxides, from flue gas emitted by coal-fired electrical plants, while not producing any waste by-products.
It wasn't until "we had large reductions in both hydrocarbons and nitrogen oxides that ozone levels went down rapidly all over," Holmes says.
The new engines are estimated to emit 69% less nitrogen oxides and 80% less particulate matter than the current engines.
To track the cycle of nitrogen in the atmosphere, they studied dinitrogen pentoxide, a molecule that results from the oxidation of nitrogen oxides.
If Seneca ran the plant without the SNCR, the particulate emissions disappeared but the nitrogen oxides increased.
A researchers' team from King Abdulaziz City for Science and Technology (KASCT) has devised an innovative technology to reduce emissions of harmful sulfur dioxide and nitrogen oxides resulting from oil refineries to rates of up to 98 per cent and 82 per cent.
Unlike conventional diesel, biodiesel contains oxygen, and researchers have shown that this presence of oxygen is responsible for the majority of the higher emission of nitrogen oxides, said Gregory Shaver, an assistant professor of mechanical engineering at Purdue.
Environmental Protection Agency wants is that Cemex install proper air pollution controls that could reduce nitrogen oxide emissions in the general Victorville area," agency spokesman Francisco Arcaute said.
SCR systems don't have this disadvantage, but they do require 'AdBlue', which converts the nitrogen oxides into nitrogen and water," says Dohle.
In most winter-air samples, a cubic meter contained 60 to 80 micrograms each of particulate matter, nitrogen oxides, and sulfur dioxide and about 150 nanograms of polycyclic aromatic hydrocarbons, exceeding common regulatory limits.
mad Georgia Power had been compelled by EPA's smog emissions-trading requirements and Atlanta's smog control plan to install pollution control equipment to reduce summertime emissions of nitrogen oxides at Bowen--not to control free particles, but to reduce ozone.
The pollutants studied included fine and ultrafine particulates of various compositions, nitrogen oxides, elemental and organic carbon, carbon monoxide, and sulfur dioxide.