Anna Nasonova

Simultaneous removal of NO and SO2 in a plasma reactor packed with TiO2-coated glass beads

We analyzed the dielectric pellet bed discharge-photocatalyst hybrid process for NO and SO2 removal. A cylindrical-wire type discharge reactor was packed with glass beads as dielectric pellets and the plasmas were generated by dielectric pellet bed discharge. The TiO2 photocatalysts were coated onto the glass beads by the dip-coating method and were activated by the light from discharge. Experiments were carried out for three cases: NO removal only, SO2 removal only, and simultaneous NO and SO2 removal. As the voltage applied to the plasma reactor increased, or as the residence time increased, the NO and SO2 removal efficiencies increased. With increasing initial NO and SO2 concentrations, the NO and SO2 removal efficiencies decrease. The removal efficiencies for simultaneous NO and SO2 removal are lower than those for NO only or SO2 only.

NOx and sox removal by low temperature plasma-photocatalysts hybrid system

We analyzed the effects of several process variables on removal efficiencies of NO and SO2 by the low temperature plasma process combined with photocatalysts. The cylinder-wire type, dielectric barrier discharge process for plasma generation was used. The photocatalysts were coated onto the glass beads by dip-coating method. As the voltage applied to the plasma reactor increases, or as the pulse frequency of applied voltage increases, the NO and SO2 removal efficiencies also increase. As the initial NO concentration decreases, or as the residence time increases, the NO and SO2 removal efficiencies increase.

Multifunctional particle coating by plasma process and its application to pollution control

Multifunctional particle coating by Plasma-Enhanced Chemical Vapor Deposition (PECVD) and its application are presented in this review. A rotating PECVD reactor can be used to prepare single-layer or multi-layer thin films on substrate particles of various materials with different shapes by using various gas/liquid precursors. The current development of the rotating PECVD process for particle coating of high quality is discussed, along with simulation and experimental results, in the present review. Flexibility in changing the process variables of rotating PECVD enables this process to be considered as a promising method for particle coating with possible applications in many different fields.

Multi-Component Reactions in Supramolecular Chemistry and Material Science

Multi-component reactions of building blocks with more than one MCR-reactive group will give rise to oligomeric MCR products. The proper choice of at least two bifunctional building blocks will give either a polymeric or a cyclic product. Apart from polymerization, repetitive or consecutive Ugi reactions have been used to produce linear MCR-heterooligomers with such building blocks.

Analysis on Fluid Dynamics in the Cooling Tube for Manufacture of Liquid Hydrogen

We present a study of hydrogen liquefaction using the CFD (Computational Fluid Dynamics) program. Liquid hydrogen has been evaluated as the best storage method because of high energy per unit mass than gas hydrogen, but efficient hydrogen liquefaction and storage are needed in order to apply actual industrial. In this study, we use the CFD program that apply navier-stokes equation. A hydrogen is cooled by heat transfer with the while passing gas hydrogen through Cu tube. We change diameter and flow rate and observe a change of the temperature and flow rate of gas hydrogen passing through Cu tube. As a result of, less flow rate and larger diameter are confirmed that liquefaction is more well. Ultimately, When we simulate the hydrogen liquefaction by using CFD program, and find optimum results, it is expected to contribute to the more effective and economical aspects such as time and cost.