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The term
nitrogen oxide is used to refer to any of these oxygen
chemical compound of
nitrogen, or to a mixture of them:
- Nitric oxide (NO), nitrogen(II) oxide
- Nitrogen dioxide (NO2), nitrogen(IV) oxide
- Nitrous oxide (N2O)
- Dinitrogen trioxide (N2O3), nitrogen(II, IV) oxide
- Dinitrogen tetroxide (N2O4), nitrogen(IV) oxide
- Dinitrogen pentoxide (N2O5), nitrogen(V) oxide
(Note that the last three are unstable.)
Chemical reactions that produce nitrogen oxides often produce several, the proportions depending on the specific reaction and conditions. This is one reason why
domestic production of N2O is undesirable; the other two stable oxides — which are extremely toxic — are liable to be produced.
Image:Nitric-oxide-3D-vdW.png|
Nitric oxide, NOImage:Nitrogen-dioxide-3D-vdW.png|
Nitrogen dioxide, NO2Image:Nitrous-oxide-3D-vdW.png|
Nitrous oxide, N2OImage:Dinitrogen-trioxide-3D-vdW.png|
Dinitrogen trioxide, N2O3Image:Dinitrogen-tetroxide-3D-vdW.png|
Dinitrogen tetroxide, N2O4Image:Dinitrogen-pentoxide-3D-vdW.png|
Dinitrogen pentoxide, N2O5
NOx
NOx is a generic term for mono-nitrogen oxides (NO and NO2). These oxides are produced during
combustion, especially combustion at high temperatures.
At ambient temperatures, the oxygen and nitrogen gases in air will not react with each other. In an
internal combustion engine, combustion of a mixture of air and fuel produces combustion temperatures high enough to drive endothermic reactions between atmospheric
nitrogen and
oxygen in the flame, yielding various
oxides of
nitrogen. In areas of high motor vehicle traffic, such as in large cities, the amount of nitrogen oxides emitted into the atmosphere can be quite significant.
In the presence of excess
oxygen (O2), nitric oxide (NO) will be converted to
nitrogen dioxide (NO2), with the time required depending on the concentration in air as shown below:
{], a significant form of air pollution, especially in the summer. Children, people with lung diseases such as asthma, and people who work or exercise outside are susceptible to adverse effects of smog such as damage to lung tissue and reduction in lung function.
Mono-nitrogen oxides eventually form
nitric acid when dissolved in atmospheric moisture, forming a component of acid rain. The following chemical reaction occurs when nitrogen dioxide reacts with water:
2NO2 + H2O → HNO2 + HNO3(nitrogen dioxide + water → nitrous acid + nitric acid).
Nitrous acid then decomposes as follows:
3HNO2 → HNO3 + 2NO + H2O(nitrous acid → nitric acid + nitric oxide + water),
where
nitric oxide will oxidize to form nitrogen dioxide that again reacts with water, ultimately forming
nitric acid:
4NO + 3O2 + 2H2O → 4HNO3 (nitric oxide + oxygen + water → nitric acid).
Mono-nitrogen oxides are also involved in
tropospheric production of ozone.
The term
nitrogen oxide is used to refer to any of these oxygen
chemical compound of nitrogen, or to a mixture of them:
(Note that the last three are unstable.)
Chemical reactions that produce nitrogen oxides often produce several, the proportions depending on the specific reaction and conditions. This is one reason why
domestic production of N2O is undesirable; the other two stable oxides — which are extremely toxic — are liable to be produced.
Image:Nitric-oxide-3D-vdW.png|
Nitric oxide, NOImage:Nitrogen-dioxide-3D-vdW.png|
Nitrogen dioxide, NO2Image:Nitrous-oxide-3D-vdW.png|
Nitrous oxide, N2OImage:Dinitrogen-trioxide-3D-vdW.png|
Dinitrogen trioxide, N2O3Image:Dinitrogen-tetroxide-3D-vdW.png|
Dinitrogen tetroxide, N2O4Image:Dinitrogen-pentoxide-3D-vdW.png|
Dinitrogen pentoxide, N2O5
NOx
NOx is a generic term for mono-nitrogen oxides (NO and NO2). These oxides are produced during
combustion, especially combustion at high temperatures.
At ambient temperatures, the oxygen and nitrogen gases in air will not react with each other. In an
internal combustion engine, combustion of a mixture of air and fuel produces combustion temperatures high enough to drive endothermic reactions between atmospheric
nitrogen and oxygen in the flame, yielding various
oxides of nitrogen. In areas of high motor vehicle traffic, such as in large cities, the amount of nitrogen oxides emitted into the atmosphere can be quite significant.
In the presence of excess oxygen (O2),
nitric oxide (NO) will be converted to nitrogen dioxide (NO2), with the time required depending on the concentration in air as shown below:
{], a significant form of air pollution, especially in the summer. Children, people with lung diseases such as asthma, and people who work or exercise outside are susceptible to adverse effects of smog such as damage to lung tissue and reduction in lung function.
Mono-nitrogen oxides eventually form
nitric acid when dissolved in atmospheric moisture, forming a component of
acid rain. The following chemical reaction occurs when nitrogen dioxide reacts with water:
2NO2 + H2O → HNO2 + HNO3(nitrogen dioxide + water → nitrous acid + nitric acid).
Nitrous acid then decomposes as follows:
3HNO2 → HNO3 + 2NO + H2O(nitrous acid → nitric acid + nitric oxide + water),
where
nitric oxide will
oxidize to form nitrogen dioxide that again reacts with water, ultimately forming nitric acid:
4NO + 3O2 + 2H2O → 4HNO3 (nitric oxide + oxygen + water → nitric acid).
Mono-nitrogen oxides are also involved in tropospheric production of ozone.
Nitrogen oxide - Wikipedia, the free encyclopedia
The term nitrogen oxide typically refers to any binary compound of oxygen and nitrogen, or to a mixture of such compounds: Nitric oxide (NO), nitrogen(II) oxide; Nitrogen dioxide ...
How Nitrogen Oxides Affect the Way We Live and Breathe | Six Common ...
Nitrogen oxides, or NOx, is the generic term for a group of highly reactive gases, all of which contain nitrogen and oxygen in varying amounts.
nitrogen oxide - Hutchinson encyclopedia article about nitrogen oxide
nitrogen oxide. Any chemical compound that contains only nitrogen and oxygen. Nitrogen monoxide and nitrogen dioxide contribute to air pollution.
Biodiesel : Reducing nitrogen oxide
Benefits : Nitrogen Oxide - Reducing nitrogen oxide. Nitrogen Oxides contribute to the localised formation of smog and ozone. Nitrogen Oxide emissions from BioDiesel are comparable ...
Nitrogen Oxide Protocol - Wikipedia, the free encyclopedia
Protocol to the 1979 Convention on Long-Range Transboundary Air Pollution Concerning the Control of Emissions of Nitrogen Oxides or Their Transboundary Fluxes, opened for signature ...
nitrogen-oxide.com
Your account has been created. You can access your website right away using the following link: 72.41.255.62. Over the next few days DNS servers all across the internet will update ...
nitrogen oxide
Any chemical compound that contains only nitrogen and oxygen ... Tiscali Quicklinks. Please visit our Accessibility Page for a list of the Access Keys you can use to find your way ...
NOx emissions and biodiesel: Journey to Forever
Nitrogen oxide emissions with biodiesel, taken from various scientific and industry studies. 1. "Adjustment of injection timing and engine operating temperature will result in ...
Nitrogen oxide
NOx is a generic term for the various nitrogen oxides produced during combustion. They are believed to aggravate asthmatic conditions, react with the oxygen in the air to produce ...
ATSDR - ToxFAQs™: Nitrogen Oxides
Nitrogen dioxide and nitric oxide have been found in at least 9 and 6 of the 1,585 National Priorities List sites identified by the Environmental Protection Agency (EPA ...
