Results 21 to 30 of about 279,843 (214)

Nitrogen oxides in the troposphere – What have we learned from satellite measurements?

open access: yesEPJ Web of Conferences, 2009
Nitrogen oxides are key species in the troposphere where they are linked to ozone formation and acid rain. The sources of nitrogen oxides are anthropogenic to large extend, mainly through combustion of fossil fuels.
Richter A.
doaj   +1 more source

Air pollution by nitrogen oxides in Sarajevo from 2005 to 2010

open access: yesJournal of Health Sciences, 2013
Introduction: Air pollution occurs when the concentration of certain substances (pollutants) reaches a size which causes its toxicity, or in other words, begins to cause harm to human health, fl ora and wildlife.
Suad Habeš   +3 more
doaj   +1 more source

REDUCTION OF NOx BY MEANS OF UREA INJECTION -ROVINARIPOWER PLANT CASE [PDF]

open access: yesAnalele Universităţii "Constantin Brâncuşi" din Târgu Jiu: Seria Inginerie, 2018
The paper examines how nitrogen in the fuel is a pollutant. The mechanism of formation of nitrogen oxides is presented: is a function of excess air, coal age (volatile matter content), and function of temperature in the
Lucica Anghelescu
doaj  

Cu-Mg-Fe-O-(Ce) complex oxides as catalysts of selective catalytic oxidation of ammonia to dinitrogen (NH3-SCO) [PDF]

open access: yes, 2020
Multicomponent oxide systems 800-Cu-Mg-Fe-O and 800-Cu-Mg-Fe-O-Ce were tested as catalysts of selective catalytic oxidation of ammonia to dinitrogen (NH3-SCO) process.
Górecka, Sylwia   +5 more
core   +1 more source

Study on energy-saving operation technology of environmental protection facilities of ultra-low emission coal-fired unit

open access: yesEnergy Reports, 2020
The operation optimization of low nitrogen combustion, denitrification and desulfurization facility of a 335 MW coal-fired unit met ultra-low requirements has been conducted in order to lower energy and material consumption.
Bing Li, Kai Wang, Baoying Zhu
doaj   +1 more source

Nitrogen Oxides on Mars.

open access: yesThe Astronomical Journal, 1964
Abstract In a series of recent papers, Kiess and collaborators have announced the identification of nitrogen peroxide on Mars and have attempted to interpret a wide range of Martian phenomena in terms of nitrogen oxides. Analyses of observations at a variety of wavelengths in the present paper, and previously by Sinton, Spinrad and Moroz, place a ...
Carl Sagan   +2 more
openaire   +1 more source

Shipping nitrogen oxides recycling via isoprene nitrate amplifies forest ozone

open access: yesCommunications Earth & Environment
Forests are essential for climate stability, yet elevated ozone levels-exacerbated by poorly understood impacts of shipping-related nitrogen oxides, stress these ecosystems.
Chunshui Lin   +5 more
doaj   +1 more source

Observations of total RONO2 over the boreal forest: NO x sinks and HNO3 sources [PDF]

open access: yes, 2013
In contrast with the textbook view of remote chemistry where HNO 3 formation is the primary sink of nitrogen oxides, recent theoretical analyses show that formation of RONO2 (ΣANs) from isoprene and other terpene precursors is the primary net chemical ...
Apel, E   +13 more
core   +1 more source

Global deposition of total reactive nitrogen oxides from 1996 to 2014 constrained with satellite observations of NO2 columns [PDF]

open access: yes, 2017
Reactive nitrogen oxides (NOy) are a major constituent of the nitrogen deposited from the atmosphere, but observational constraints on their deposition are limited by poor or nonexistent measurement coverage in many parts of the world.
Geddes, Jeffrey A., Martin, Randall V.
core   +1 more source

A Mathematical Modelling of Nitrogen Oxide Formation in a cng Spark Ignition Engine

open access: yesCommunications, 1999
Nitrogen oxides occupy aspecific position among gaseous harmful emissions produced by combustion engines. This position may externally appear as a coherence between energetic and ecological properties of the engine.
Vladimir Hlavna, Daniela Zvarkova
doaj   +1 more source

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