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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.
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268 citations
TL;DR: In this paper, a comprehensive review on the impact of potential biodiesel feedstocks (edible and non-edible) on engine performance and exhaust emissions including details of engine and operating condition is presented.
Abstract: Global energy demand is increasing due to the population growth and industrialization. In order to fulfill the energy demand with considering global concern, it is necessary to find out alternative fuel sources. Biodiesel is one of the best choices because of its immense potential to be part of energy mix in the near future as well as the capability of reducing greenhouse gas emissions. This paper aims to provide information to the engineers, industrialists and researchers who are interested on biodiesel. The paper presents a comprehensive review on the impact of potential biodiesel feedstocks (edible and non-edible) on engine performance and exhaust emissions including details of engine and operating condition. A large number of literatures from highly rated journals in scientific indexes are reviewed including the most recent publications. Most of the authors showed that using biodiesel from various feedstocks in diesel engines slightly lowered brake power and brake thermal efficiency but increases BSFC than diesel fuel. It was also reported that biodiesel significantly reduced the PM, HC, CO and CO 2 emissions but gives slightly higher NOx emissions. It was shown that NOx can be reduced by some approaches such as blending with additives and EGR technique. The study concluded that biodiesel can be used in compression ignition engine with no or minor engine modification. Finally biodiesel can be used as a substitute of diesel fuel to fulfill the energy demand, reduce dependency on fossil fuel as well as the exhaust emissions of the engine.
268 citations
TL;DR: In this article, a mixture of biodiesel fuels produced from two different kinds of waste cooking oils was blended in 5% and 10% with No. 2 diesel fuel, and the detailed combustion and engine performance results showed that the ignition delay with the biodiesel addition was decreased for the all engine loads with the earlier combustion timings due to higher cetane number of fuel.
267 citations
TL;DR: In this paper, the formation of MnOx−CeO2 solid solutions with the fluorite-type structure at n ≃ 05 was found quite effective in accelerating NOx sorption from flowing mixtures of 008% NO, 2% O2, and He balance (W/F = 024 g·s/cm3).
Abstract: Interactions of nitrogen oxides (NOx) with (n)MnOx−(1 − n)CeO2 binary oxides were studied to use them for sorptive NOx removal at low temperatures (≃150 °C) The formation of MnOx−CeO2 solid solutions with the fluorite-type structure at n ≃ 05 was found to be quite effective in accelerating NOx sorption from flowing mixtures of 008% NO, 2% O2, and He balance (W/F = 024 g·s/cm3) The cumulative NOx uptake was increased by decreasing the reaction temperature and/or by increasing O2 concentration, indicative of chemisorption via oxidation of NO/NO2 In situ FT-IR diffuse reflectance spectrometry demonstrated that adsorption of NOx as bidentate, monodentate, and ionic nitrates is responsible for the large uptake These adsorbates are produced by oxidative adsorption, which is caused by NO oxidation to NO2 by lattice oxygens bound to Mn and subsequent coordination to Ce in adjacent surface sites XPS and O2-TPD studies suggested that the active site for NO oxidation should be related to the redox of Mn and
267 citations
TL;DR: In this article, the implications of O 2 /CO 2 recycle combustion on NO x and SO 2 emissions were investigated in a coal-fired power plant and two main types of experiments were performed: combustion in once-through O 2/CO 2 mixtures and experiments with recycled flue gas.
266 citations