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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 24 for “"NO formation"”.
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A flame sheet model of combustion and NO formation in diesel engines
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1997.
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Investigations of the Effects of Flame Configuration on the Combustion of Laminar Diffusion Flame
… followed by the literature survey on soot formation in inverse diffusion flame (IDF), application of the unique structure of double inverse diffusion flame (DIDF), radiation effects on DIDF, factors that affect the formation of nitric oxide and effects of elevated pressure on diffusion …
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Fuel-NOx Formation during Low-Grade Fuel Combustion in a Swirling-Flow Burner
<p>Insufficient knowledge of fireside behavior in the near-burner region during biomass combustion is one of major factors preventing widespread use of this renewable fuel in pulverized coal power plants. The current research is aimed to investigate the impact of biomass cofiring on NO formation in …
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An experimental investigation of the conversion of NO to NO2 in a simulated gas turbine environment
Unexpectedly high concentrations of NO₂ have been noted in stack emissions from industrial gas turbines. NO₂ formation appears to occur through the so called "HO₂ mechanism II in which NO combines with HO₂ to produce NO₂ and OH. In this study, the formation of NO₂ was investigated through computer …
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Experimental and Theoretical Investigations of Coherent Anti -Stokes Raman Scattering as a Nonintrusive Diagnostic for Gas -Phase Systems
… an electronic resonance to provide the first known theoretical predictions for NO. To determine the model's accuracy and effectiveness, predictions were compared to previously obtained experimental data. The comparisons displayed close agreement between spectral peak locations and relative …
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Electrochemical NOx reduction using a carbon nanospiked catalyst
Electrochemical NOx reduction was studied using a novel, nanostructured nitrogen-doped carbon nanospikes catalyst (CNS). NOx is a major environment and health concern that is typically eliminated using noble-metal gas-phase catalytic reactors. Alternatively, an electrocatalytic approach may reduce …
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Biologische Aspekte der nicht-enzymatischen Stickstoffmonoxid-Generierung durch UVA-induzierten Nitritzerfall in humanen Hautfibroblasten
Nitric oxide (NO•) plays a pivotal role in the physiology of the human skin and is involved in many biological processes like tanning, wound healing as well as the proliferation and differentiation of keratinocytes and fibroblasts. Furthermore NO• can act as a cell protective agent and prevent …
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Simulation and design of a hydrogen arcjet thruster seeded with cesium
… modified to account for thermal and chemical non-equilibrium. The equations were numerically integrated by MacCormacks predictor-corrector scheme and a TVD scheme. The electric potential was solved by successive over-relaxation. Results show that the seeded arcjet can be run with the cesium …
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Nitrogen oxide emissions from circulating fluidized bed combustion
A detailed study of NOT formation and destruction has been carried out on a pilot scale circulating fluidized bed combustor of cross-section 0.15 x 0.15 m and height 7.3 m. Coals of various ranks, including anthracite, bituminous, sub-bituminous and lignite, as well as one petroleum coke, were used …
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The physicochemical and antioxidant properties of double-boiled kelulut honey
… Therefore, double boiling was chosen as it does not exert significant heat, thus minimizes damage done. The quality was determined after treated by double boiling technique at optimized condition. Three different sources of Kelulut honey based on the main types of foods consumed by the bees …
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Preparation of Novel Carbenes and their Catalytic Application to the Cross-Benzoin, Aza-Benzoin and Stetter Reactions
… aliphatic aldehydes as well. A library of bis(amino)cyclopropenium salts were prepared, and the corresponding bis(amino)cyclopropenylidenes (BACs) generated in situ were screened in the Stetter reaction. Among those tested, bis(diethylamino)cyclopropenylidene (EtBAC) was found to be the most …
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LARGE EDDY SIMULATION OF TURBULENT HYDROGEN FLAMES
… effects, and increased nitrogen oxides (NOx) emissions. These issues are particularly critical in lean premixed conditions, which are commonly used to limit emissions but lead to complex turbulence-chemistry interactions. This dissertation investigates turbulent hydrogen combustion using …
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Novel measures to investigate the social structure and reproductive performance in a dynamic sow herd using social network analysis.
… Although a lack of reciprocation showed no formation of sustained friendships, indicating alternative motivations for selective interactions. Prominence was not revealed as stable in the preferential association or agonistic networks. By comparison, influence was more stable in the …
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Conditional source-term estimation methods for turbulent reacting flows
… (TGLDM) method are combined with CSE in Reynolds-Averaged Navier Stokes (RANS) simulation of non-premixed autoigniting jets. Despite the scatter observed in the experimental data, the predictions of ignition delay from both methods agree reasonably well with the measurements. The discrepancy …
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Avanços e desafios para o atendimento as necessidades especiais de alunos com deficiência física no centro de ciências agrárias da UFPB
… it was verified that the participants have knowledge about this thematic, at the same time that they recognize the importance and that they accept in a positive way the inclusion of students with disabilities in Higher School. Most of the professionals feel unprepared to act more effectively …
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The role of cysteine 230 and lysine 238 of biotin carboxylase in the deprotonation of biotin and synthesis of bisubstrate analogy inhibitor of carboxyltransferase
… in the Km for ATP. The C230A mutation had no effect on the formation of carboxybiotin, indicating that cysteine 230 does not play a role in the deprotonation of biotin. However, the K238Q mutation resulted in no formation of carboxybiotin, which showed that lysine 238 has a role in the …
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Large eddy simulation of a fuel-rich turbulent non-premixed reacting flow with radiative heat transfer
… (β- PDF) for the simulation of turbulent non-premixed reacting flow, in particularly for the predictions of soot and NO production, and to investigate the radiative heat transfer during combustion process applying Discrete Ordinates Method (DOM). LES seeks the solution by separating the …
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Nitric oxide reduction by non-thermal plasma and catalysis
… millions of tons of air pollutants such as NOx and SO2. The high cost and operating difficulties of prevailing selective catalytic reduction (SCR) process are driving R&D efforts towards alternative technologies and modifications to the SCR technology. Non-thermal plasma technique has been …
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Untersuchungen zur extrazellulären Matrix unter Implantation differenter Netzmaterialien zum Bauchwandersatz
… are increasingly being used. Because it is known that changes of the extra cellular matrix appear in hernia patients (alterations of collagen type -I/-III ratio, expression of MMP’s), it was the frame of this study to examine, which changes could be observed during mesh implantation in the …
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Influence of dietary antioxidants on luminal nitrite chemistry under conditions simulating the gastro-oesophageal junction
… gastric cancers arise in the antrum and body (non-cardia) of the stomach, the incidence of proximal tumours of the cardia and distal oesophagus have increased dramatically over the last fifty years throughout the world. This major change in the pattern of the disease suggests that gastric …
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