Nitrous Oxide N2O

As discussed above the preferred technology for NOx removal in nitric add plants is selective catalytic reduction (SCR) using ammonia as a reductant and in many cases vanadium-pentoxide-type catalysts. Unfortunately, this process does not remove of N2O (nitrous oxide)221. 

Globally, the oxides of nitrogen, NO (nitric oxide), NO2 (nitrogen oxide), and N2O (nitrous oxide), are key species involved in the chemistry of the troposphere and stratosphere. NO and N2O are produced mostly by microbial soil activity, whereas biomass burning is also an important source of NO. Nitric oxide is a species involved in the photochemical production of ozone in the troposphere, is involved in the chemical produaion of nitric acid, and is an important component of acid precipitation. Nitrous oxide plays a key role in stratospheric ozone depletion and is an important greenhouse gas, with a global warming potential more than 200 times that of CO2. 

Example N2O, nitrous oxide, has 2(5) + 6=16 valence electrons or eight pairs. 

N2O. Nitrous oxide, or dinitrogen oxide, is also a colorless gas at room temperature. Its principal uses are as an anaesthetic and as an aerosol propellant, but it is not a major industrial chemical. It is generally produced (in a lab or industrial setting) by the carefully controlled thermal decomposition of ammonium nitrate (NH4NO3) ... 

The conditions that govern the endproducts of the nitrogen reactions are not yet well understood. The formation of N2O (nitrous oxide) is of interest because it is a long-lived greenhouse gas in die atmosphere and its concentration is increasing. Nitrous oxide is often released initially after nitrate fertilizers are added to soils. 

Nitrous oxide (N2O) is a potent greenhouse gas that has also been implicated in stratospheric ozone depletion. The atmospheric inventory of N2O is presently increasing, so there is a renewed interest in the marine ecosystem as a potential source of N2O. Nitrous oxide is a trace gas in sea water, with typical concentrations ranging from 5 to 50 nmol... 

Nitrous oxide (N2O) Nitrous oxide is a colorless gas, commonly known as laughing gas, and is slightly soluble in water. It is an intermediate in the nitrogen cycle, and it resembles oxygen in its behavior when heated with combustible substances. It is an end product of denitrification and is also produced as a result of chemical reactions in the atmosphere. 

While ozone is a good molecule high in the stratosphere, its reviews in the lower troposphere are decidedly mixed. It is the source of minuscule concentrations of hydroxyl radical (OH, 10 molecules/ cm ). Hydroxyl is so extraordinarily active that it reacts with hydrocarbons (methane, benzene, etc) and most atmospheric compounds. Some extremely stable molecules, including chlorofluorocarbons like CFCI3 and CF2CI2 and N2O (nitrous oxide from fertihzers, a source of stratospheric NO), do not react with OH and migrate to the upper stratosphere (see chapter 8 for the consequences). 

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