Studies On Gas-Phase Oxidation Of Nitric Oxide Using Ozone
| dc.contributor.author | Abdul Patah, Abir | |
| dc.date.accessioned | 2016-09-30T07:41:55Z | |
| dc.date.available | 2016-09-30T07:41:55Z | |
| dc.date.issued | 2007-09 | |
| dc.description.abstract | Emission of nitrogen oxides (NOx) such as nitric oxide and nitrogen dioxide presents a significant problem in environmental pollution control. NOx is difficult to remove in wet scrubbers because most of it is in the form of NO, which has a very low in solubility properties. If NO could be converted to higher oxidized states such as N02, HN02, and HN03, then these species could be removed by wet scrubbing. Thus, the main aim of this work is to study the gasphase oxidation reaction of nitric oxide using ozone. Experimental works were carried out in a plug flow reactor at atmospheric pressure with reaction temperatures varying from 30 to 300 °C, residence times ranging from 0 to 300s and ratios of ozone to NO ranging from 0.5 to 1.5 were carried out. In addition, a study is carried out with the presence of moisture in the inlet NO in order to ascertain whether there is any effect of dominance of moisture on oxidation reaction of NO with ozone. A mathematical model is presented to describe this oxidation process theoretically using Matlab programming software. The effect of factors namely residence time, ratio of O:JNO and temperature on percentage conversion of NO were studied using the model with the two sets of data. The simulation of the model with rate equation of Atkinson showed that the conversion of NO increased with residence time. However optimum for ratio of O:JNO and temperature were observed at 1.0 and 200°C respectively. The results of simulations of the model using data from Atkinson showed compatibility of data with experimental results. A study was made for identification of parameters ratio O:/NO and temperature for optimization of the traverse length/time. This study showed a ratio of O:/NO of 1.5 and temperature of 200°C suited well for optimum traverse length. Design of Experiment (DOE) was used to assess the effects of temperature, residence time and concentration ratio of O:/NO on the conversion of NO. The yield of nitrogen dioxide was maximized by determining the optimum conditions using response surface methodology. The optimum reaction conditions were reaction temperature of 224°C, residence time of 158s and concentration ratio of O:/NO of 1 .4 which give the percentage conversion of NO of 98%. | en_US |
| dc.identifier.uri | http://hdl.handle.net/123456789/2655 | |
| dc.subject | Oxidation Of Nitric Oxide | en_US |
| dc.subject | Using Ozone | en_US |
| dc.title | Studies On Gas-Phase Oxidation Of Nitric Oxide Using Ozone | en_US |
| dc.type | Thesis | en_US |
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