The ability of nitrogen oxides to cause a major-accident

This bachelor thesis is focused on the potential of nitrogen oxides in the flue gas to cause a major accident. The aim of the bachelor thesis was to assess the potential of nitrogen oxides, which are a part of the flue gas, to cause a major accident by reacting with gas phase LPG. The theoretical part of the thesis describes the current state of prevention of major accidents and the handling of chemical substances, the legal framework of this topic and the system of research. It also describes the current state in the topic of flue gas, legal framework and its origin. Finally, the theoretical part describes nitrogen oxides, their origin, characteristics, dangerous properties and methods of their analysis. The aim of this work was to assess the risk posed by nitrogen oxides in the exhaust gas, in this case exhaust gases of cars and heaters, in area of major accidents prevention and the ability to cause a combustion of gas phase LPG and consequently a major accident. The necessary data for this assessment were obtained by sampling the exhaust gas, determining the concentration of nitrogen dioxide in the samples, and by then carrying out an experimental determination of whether the contact of the gases at these concentrations would cause a combustion. To find out the concentration of nitrogen dioxide in the flue gas, the Saltzman flue gas sampling and subsequent analysis method was used. The results show that passenger cars with diesel engines have the highest concentrations of nitrogen dioxide in their exhaust gas. The results of experiments with gas phase LPG did not prove the ability of nitrogen dioxide to initiate a combustion of LPG at concentrations around 100 ?g/l, or to initiate a combustion with diesel car exhaust gas