Accelerators Laboratory

Multidisciplinary research using charged particle beams

Pollutants removal

Classical technologies like wet, dry and semi-dry flue gas desulphurization (FGD) and selective catalytic reduction (SCR) can be applied for flue gas treatment and SO2 and NOx emission control, but all these technologies are complex chemical processes and wastes, like wastewater, gypsum and used catalyst, are generated. Reporting on the development of radiation sources to be applied for environmental remediation mostly concerns high power electron beam machines. EB technologies has to be competitive with conventional ones, both from economic and technical points of view. Therefore, any development concerning cost reduction and technological improvements plays an important role for further process implementation.

The main idea of our researches was to combine the efficacy of the EBs (ionizing radiation) and the special characteristics of MWs (non-ionizing radiation) in order to reduce the required electron beam dose level and irradiation time to a minimum and thus to save the cost of ionizing radiation.

Using this method, there were accomplished experiments for developing of some original technologies for environmental depollution, namely: acid gases and volatile organic compounds reduction from flue gases, sewage sludge treatment and bio-wastes sterilization.

Also, we have proposed for flue gases treatment, the medium-energy EB accelerators, so that the energy losses in the windows and in the air gap between them to be reduced. To increase the density of the reaction medium and to reduce the penetration depth of EB, we used fine water droplets. Determining the energy efficiency, the favorable effect of the method was demonstrated.

In order to investigate these methods, several original installations which permit separate, successive and simultaneous microwave and electron beam irradiation were carried out.

Research Areas