This paper reports the results of an experimental investigation on the effect of the EGR on the pollutants emission, especially on oxides of nitrogen, from the exhaust gases and performance of the spark ignition engine. Also along with experimental work, a mathematical model for the determination of the effect of EGR on the peak cycle temperature and for the prediction of its effect on the NOx ...

Nitrogen oxide (NOx) is a significant precursor of particulate matter (PM), particularly in high-traffic areas. Accordingly, this study aimed to reduce the presence nitrogen along roadsides. Titanium dioxide (TiO2) used as photocatalyst remove NOx through chemical reaction. Typically, concrete and TiO2 are mixed create concrete. However, air pollutants or UV rays cannot be allowed come into con...

The 40th anniversary of the manufacture of the world’s fi rst commercial batch of autocatalysts for passenger cars at Johnson Matthey Plc’s site in Royston, UK, was marked in May 2014. Despite the enormous progress made in reducing the emission of pollutants from vehicles since the 1970s, there has also been considerable recent discussion about the levels of nitrogen oxides (NOx), especially ni...

During the past decade, a proliferation of medical studies have pointed out key roles of particulates (PM) and nitrogen oxides (NOx) emissions from vehicles powered by diesel engines. PM exposition healtheffects were associated with PM direct actions while NOx were not estimated dangerous for their direct impact, but through their potential chemical reactivity in atmosphere to form ozone with s...

As the regulations of pollutant emission is getting more and more strict, models of pollutant formation, as a part of system level models for control design, are needed. In this thesis NOx (nitrogen oxides) formation is modeled. A method is developed to mix equilibrium and non-equilibrium reaction equations to model NOx formation in combustion processes. This algorithm reduces high-index DAE sy...

NOx (Nitrogen Oxides) and PM (Particular Matter) emitted from diesel engines are one of the causes of air pollution. In this research, NOx removal performance from simulated diesel exhaust gas by Townsend type DBD (Dielectric Barrier Discharge) and filamentary type DBD was investigated. As the results, it became apparent that (1) NO concentration decreased with the increase of specific input en...

BACKGROUND Environmental and lifestyle factors regulate the expression and release of immune mediators. It has been hypothesised that ambient air pollution may be such an external factor and that the association between air pollution and impaired glucose metabolism may be attributable to inflammatory processes. Therefore, we assessed the associations between air pollution, circulating immune me...

The present paper develops and validates a numerical procedure for the calculation of turbulent combustive flow in converging and diverging ducts and through simulation of the heat transfer processes, the amount of production and spread of Nox pollutant has been measured. A marching integration solution procedure employing the TDMA is used to solve the discretized equations. The turbulence mode...

In order to lower the Nitrogen Oxides (NOx) concentration in internal combustion engine emissions and to improve performance, Exhaust Gas Recirculation (EGR) and Scavenging mechanism are introduced. EGR recirculates a fraction of the exhaust gas back into the cylinders, thus diluting the intake air. This lowers the maximum combustion temperature and, since the formation of NOx is heavily depend...

The objective of this work is to optimize the control parameters of the direct injection (DI) single cylinder diesel engine with respect to NOx (Oxides of Nitrogen) and fuel emissions through experimental investigations and Taguchi method. A single cylinder 5.2 kW diesel engine was selected for this experiment. Five parameters such as clearance volume, valve opening pressure, nozzle-hole diamet...