This article is about nitrogen oxides produced during combustion. For a more extensive list of nitrogen oxides, see nitrogen oxide. For other meanings of "Nox", see Nox.
In atmospheric chemistry, NOx is shorthand for nitric oxide (NO) and nitrogen dioxide (NO2), the nitrogen oxides that are most relevant for air pollution.[1][2] These gases contribute to the formation of smog and acid rain, as well as affecting tropospheric ozone.
NOx gases are usually produced from the reaction between nitrogen and oxygen during combustion of fuels, such as hydrocarbons, in air; especially at high temperatures, such as in car engines.[1][2][3] In areas of high motor vehicle traffic, such as in large cities, the nitrogen oxides emitted can be a significant source of air pollution. NOx gases are also produced naturally by lightning.
NOx does not include nitrous oxide (N2O),[1] a fairly inert oxide of nitrogen that contributes less severely to air pollution, notwithstanding its involvement in ozone depletion[4] and high global warming potential.
NOy is defined as the sum of NOx plus the NOz compounds produced from the oxidation of NOx which include nitric acid, nitrous acid (HONO), dinitrogen pentoxide (N2O5), peroxyacetyl nitrate (PAN), alkyl nitrates (RONO2), peroxyalkyl nitrates (ROONO2), the nitrate radical (NO3), and peroxynitric acid (HNO4).[5][6]: 30
^ abc
Mollenhauer, Klaus; Tschöke, Helmut (2010). Handbook of Diesel Engines. Springer. pp. 445–6. ISBN 978-3-540-89082-9.
^ ab
Omidvarborna; et al. (December 2015). "NOx emissions from low-temperature combustion of biodiesel made of various feedstocks and blends". Fuel Processing Technology. 140: 113–8. doi:10.1016/j.fuproc.2015.08.031.
^
Annamalai, Kalyan; Puri, Ishwar K. (2007). Combustion Science and Engineering. CRC Press. p. 775. ISBN 978-0-8493-2071-2.
^Ravishankara, A. R.; Daniel, J. S.; Portmann, R. W. (2009). "Nitrous Oxide (N2O): The Dominant Ozone-Depleting Substance Emitted in the 21st Century". Science. 326 (5949): 123–5. Bibcode:2009Sci...326..123R. doi:10.1126/science.1176985. PMID 19713491. S2CID 2100618.
^Seinfeld, John H.; Pandis, Spyros N. (2016-03-29). Atmospheric chemistry and physics : from air pollution to climate change (3rd ed.). Wiley. ISBN 978-1-119-22116-6. OCLC 929985467.
In atmospheric chemistry, NOx is shorthand for nitric oxide (NO) and nitrogen dioxide (NO2), the nitrogen oxides that are most relevant for air pollution...
Look up nox or Nox in Wiktionary, the free dictionary. Nox may refer to: NOx, a generic term for the mono-nitrogen oxides: Nitric oxide (NO) Nitrogen dioxide...
signed to WWE, where she performs on the Raw brand under the ring name Tegan Nox. Newell previously wrestled on the British independent circuit under the...
[NO2]+) In atmospheric chemistry: NOx (or NOx) refers to the sum of NO and NO2. NOy (or NOy) refers to the sum of NOx and all oxidized atmospheric odd-nitrogen...
also associated with several oracles. The name of her Roman equivalent is Nox. According to Hesiod's Theogony, Nyx is the offspring of Chaos, alongside...
A NOx adsorber or NOx trap (also called Lean NOx trap, abbr. LNT) is a device that is used to reduce oxides of nitrogen (NO and NO2) emissions from a lean...
Pandora Bösmüller, better known by her stage name Pandora Nox, is an Austrian drag performer. She is best known for winning the first season of Drag Race...
Nox Arcana is the American neoclassical dark wave, dark ambient musical project of Joseph Vargo. It was founded in 2003 as a duo with William Piotrowski...
Nox Guni alias Nox, is a Zimbabwean musician, performing artist, songwriter and producer based in South Africa. He is renowned for the musical movement...
obsolete in 1981 by "three-way" converters that also reduce oxides of nitrogen (NOx); they are still used on lean-burn engines to oxidize particulate matter...
standards for unit names. One phot (ph) equals 10 kilolux (10 klx). One nox (nx) equals 1 millilux (1 mlx) at light color 2042 K or 2046 K (formerly...
A nitrogen oxide sensor or NOx sensor is typically a high-temperature device built to detect nitrogen oxides in combustion environments such as an automobile...
Methaqualone is a hypnotic sedative. It was sold under the brand names Quaalude (/ˈkweɪluːd/ KWAY-lood) and Sopor among others, which contained 300 mg...
trials. A Spiegelmer (NOX-A12, olaptesed pegol) was under development as a combination therapy for a number of cancer indications. NOX-A12 targets CXCL12...
AquaNox is a series of submarine-based first-person shooter/simulation video games set in the distant future. The collection includes AquaNox, AquaNox 2:...
combustion engines, exhaust gas recirculation (EGR) is a nitrogen oxide (NOx) emissions reduction technique used in petrol/gasoline, diesel engines and...
Jeep Renegade, exceeded legal European emission limits for nitrogen oxide (NOx) by more than 10 times. ICCT and ADAC showed the biggest deviations from...
VI of the 1997 MARPOL Protocol. The emissions specifically include SOx, NOx, ODSs and VOCs and the regulations came into effect in May 2005. Annex VI...
Anomoeotes nox is a species of moth of the Anomoeotidae family. It is known from the Republic of the Congo. Wikispecies has information related to Anomoeotes...
Ipomoea alba, sometimes called the tropical white morning-glory, moonflower or moon vine, is a species of night-blooming morning glory, native to tropical...
caused the vehicles' NOx output to meet US standards during regulatory testing. However, the vehicles emitted up to 40 times more NOx in real-world driving...
Bona nox! bist a rechta Ox, K. 561, is a canon in A major for four voices a cappella by Wolfgang Amadeus Mozart; Mozart entered this work into his catalogue...
Droit du seigneur ('right of the lord'), also known as jus primae noctis ('right of the first night') or prima nocta, was a supposed legal right in medieval...
Global Information