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NOx

About: NOx is a research topic. Over the lifetime, 26367 publications have been published within this topic receiving 496555 citations.


Papers
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Journal ArticleDOI
TL;DR: On the whole, compared with Euro V diesel fuel, the blended fuels could lead to reduction of both NO(x) and PM of a diesel engine, with the biodiesel-methanol blends being more effective than the biod diesel-ethanol blended.

244 citations

Journal ArticleDOI
TL;DR: In this paper, the photoilluminated TiO2 generates reactive oxygen species which oxidize (NO and NO2) to (NO2 and HNO3) to remove low-probability NOx from air.

244 citations

Journal ArticleDOI
TL;DR: In this article, an off-line three-dimensional tropospheric chemical transport model, parallel-Tropospheric Off-Line Model of Chemistry and Transport (p-TOMCAT), has been extended by incorporating a detailed bromine chemistry scheme that contains gas-phase reactions and heterogeneous reactions on both cloud particles and background aerosols.
Abstract: [1] An off-line three-dimensional tropospheric chemical transport model, parallel–Tropospheric Off-Line Model of Chemistry and Transport (p-TOMCAT), has been extended by incorporating a detailed bromine chemistry scheme that contains gas-phase reactions and heterogeneous reactions on both cloud particles and background aerosols. Bromine emission from bromocarbon photo-oxidation and from sea-salt bromine depletion and bromine removal through dry and wet deposition are included. Using this model, tropospheric bromine chemistry and ozone budgets are studied. The zonal mean of the inorganic gas-phase bromine compounds (Brx) is calculated to be high (4–8 pptv) in the lower troposphere of the midlatitudes to high latitudes in each hemisphere, with decreasing trends with altitude (down to ∼2–3 pptv in the upper troposphere). The lowest Brx ( 1 pptv) are found over the high-latitude ocean surface, corresponding to high tropospheric column BrO values of up to 1.6 × 1013 molecules/cm2 in the monthly mean. The addition of bromine chemistry to the model leads to a reduction in tropospheric ozone amounts by 4–6% in the Northern Hemisphere and up to ∼30% in the Southern Hemisphere high latitudes. The net ozone loss depends not only on total Brx, but also on solar irradiance, especially at high latitudes. The hydrolysis reaction of bromine nitrate, which occurs on cloud and aerosol surfaces (BrONO2 + H2Oaq → HOBr + HNO3), has a significant influence on ozone chemistry through its effect on NOx as well as on reactive BrO and Br.

244 citations

Journal ArticleDOI
01 Feb 2008-Energy
TL;DR: In this article, the effect of cooled EGR gas temperature level for various EGR percentages on performance and emissions of a turbocharged DI heavy duty diesel engine operating at full load was examined, using a multi-zone combustion model.

243 citations

Patent
17 Feb 2015
TL;DR: In this paper, a soot filter coated with a material effective in the Selective Catalytic Reduction (SCR) of NOx by a reductant, e.g., ammonia.
Abstract: Provided is a catalyst article for simultaneously remediating the nitrogen oxides (NOx), particulate matter, and gaseous hydrocarbons present in diesel engine exhaust streams. The catalyst article has a soot filter coated with a material effective in the Selective Catalytic Reduction (SCR) of NOx by a reductant, e.g., ammonia.

243 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20241
20231,699
20223,249
20211,405
20201,353
20191,367