NO_xEmission and Mitigation Technologies

Abstract

NO x are one of the most important pollutants produced during combustion of fossil fuels. Emissions of NO x from combustion systems are primarily in the form of nitric oxides (NO). They are generally produced from the oxidation of the nitrogen contained in the atmospheric air or by the oxidation of the nitrogen‐bounded compounds in the fuel. NO is the main compound produced from the combustion; however, once it has been released in the atmosphere, it rapidly reacts producing NO 2 , which is more stable than NO. For this reason, NO 2 are generally regulated as representative NO x compound. In general, NO x are toxic, they also react to form smog and acid rain, and they play a central role in the formation of ozone in the troposphere. In addition, NO x , is a major greenhouse gas. This article reviews the mechanisms that govern the formation of NO x emissions from fossil fuels combustion and the main transformations in the atmosphere. Thermal, prompt, and fuel NO x mechanisms are presented. Finally, the modern technologies for mitigating the NO x emissions from power systems are presented, divided as precombustion, combustion modifications, and postcombustion techniques.

Novel Preparation of Cu and Fe Zirconia Supported Catalysts for Selective Catalytic Reduction of NO with NH3

“…Their emission mainly arises from stationary (fossil fuels combustion) and mobile sources (vehicles), contributing to the formation of photochemical smog, acid rains, and ozone depletion. Different technologies have been used to reduce NOx emission [1]. Among them, direct decomposition of NOx into N 2 and O 2 is ideal as it only requires a simple contact with the surface of a catalyst.…”

NOx Formation and Control: On Thermochemistry of NNH

“…In high temperature (≥2200 K) NOx formation, and low temperature(≤1900 K) reduction, the NNH species has been observed [9,3,2], when the breaking and stability of nitrogen-nitrogen bond are considered respectively. This contribution of the NNH thermo-chemical properties dataTable is to add to the existing literature of Nitrogen and NOx chemistry, as more stringent legislative demands for greener environments for NOx removalare put in place, and better technological searches in real-time Data Driven Control-Oriented (DDCO) sensors with ease of least-squares calibration and bias correction [10], for low temperature NOx control and removal through N 2 formation arebeing made, with such concerns for species concentration changes during the stages of the combustion process or simply, combustion aging concerns.…”