IR and UV gas absorption measurements during NOx reduction on an industrial natural gas fired power plant

Plasma-Based Depollution of Exhausts: Principles, State of the Art and Future Prospects

“…The deNOx efficiency was found to be maximum at 100 °C and the addition of small water droplets improves the NOx oxidation rate (Stamate et al, 2010). Advantages of LTO NOx is that the plasma discharge is kept clean and the removal rate of NO is higher than direct oxidation methods where the reverse reactions occur to reform NO and NO 2 by the O radical (Yoshioka et al, 2003;Eliasson & Kogelschatz, 1991 as cited in Stamate et al, 2010).…”

“…Advantages of LTO NOx is that the plasma discharge is kept clean and the removal rate of NO is higher than direct oxidation methods where the reverse reactions occur to reform NO and NO 2 by the O radical (Yoshioka et al, 2003;Eliasson & Kogelschatz, 1991 as cited in Stamate et al, 2010). A commercial system applying ozone injection is available under the trademark LoTox (Low Temperature Oxidation).…”

Pollutant Degradation in Gas Streams by means of Non-Thermal Plasmas

“…For example, the oxidation of non-soluble VOCs results in soluble by-products such as formaldehyde or formic acid. This can also be used for the removal of NO x [48]. The so-called Plasma Enhanced Selective Catalytic Reduction (PE-SCR) of NOx offers many synergies between plasma and catalyst.…”

Application of Non-Thermal Plasma for NOx Reduction in the Flue Gases

“…This problem can be solved by oxidizing NO to NO 2 or further to N 2 O 5 . The oxidation to NO 2 improves the efficiency of the catalytic reduction at low temperatures [14][15][16] while the oxidation to N 2 O 5 is beneficial for the absorption of nitrogen oxides [17,18]. It is achieved using non-thermal plasma, which in most cases is generated using a corona discharge or a dielectric barrier discharge device [11,[14][15][16]19,20].…”

“…Besides, the non-thermal plasma has showed promising results in the field of human health protection by using non-thermal plasma for disinfection [21,22] and the environment by improving air and water quality [23][24][25][26]. Moreover, plasma was applied to remove NO X from real flue gases of power plants and diesel engines [17,18,27] or synthetic flue gases representing certain types of real flue gas [14][15][16][28][29][30][31]. Most often, the used gases represent exhausts from diesel engines or coal power plants which contain relatively large concentrations of nitrogen oxides and hydrocarbons.…”