Kinetic modelling of NO heterogeneous radiation-catalytic oxidation on the TiO2 surface in humid air under the electron beam irradiation

Electron-beam fl ue gas treatment (EBFGT) technology has been applied in an industrial scale, EPS Pomorzany [1]. High removal effi ciency of SO2 (>90%) and NOx (ca. 70%) was obtained at 8 kGy absorbed dose. NOx removal needs much bigger energy consumption than that for SO2. Therefore, there is a need to fi nd a way to decrease energy consumption for NOx removal in this process. Electron accelerators with high power are very expensive, the cost of accelerator is proportional to its power. It will be very costly to study the EBFGT process experimentally, especially in an industrial scale. Therefore, theoretical study of the process of electron-beam treatment of fl ue gas are fi rst being looked for by many researchers. A hybrid system of a catalyst, combined with EB, might be one of the solutions [2]. In this case, the oxidation processes of NOx and SO2 take place on the catalyst surface in fl ue gas under the electron-beam treatment. As a result, a higher removal effi ciency of NOx from fl ue gas in the presence of catalyst can be expected at a lower irradiation dose. It provides a possibility that lower power accelerators at lower cost could be applied for EBFGT. It is a well-known fact that ionizing radiation might essentially affect kinetics and mechanism of reactions taking place on the surfaces of dispersive solid bodies. Ionic radiolysis products (free electrons and holes) play an essential role in such processes. In 1966, the researchers in N. D. Zelinsky Institute for Organic Chemistry of the Academy Kinetic modelling of NO heterogeneous radiation-catalytic oxidation on the TiO2 surface in humid air under the electron beam irradiation Henrietta Nichipor, Yongxia Sun, Andrzej G. Chmielewski