Plasma-assisted synthesis of N₂O₅from NO₂in air at atmospheric pressure using a dielectric pellet bed reactor

Abstract

It has been demonstrated that a dielectric packed pellet-bed plasma reactor operating on a mixture of NO 2 in air at atmospheric pressure can be used as an efficient method for the synthesis of dinitrogen pentoxide, N 2 O 5 . The reactor is packed with glass beads and operates at high frequency (10-13 kHz) and high voltage (V pk−pk < 30 kV). Typically, the energy density is 38 J l −1 and 45 ppm of NO 2 is converted into 53 ppm of N 2 O 5 . The synthesis of N 2 O 5 is found to be plasma-assisted in the sense that sources of nitrogen in addition to the initial NO 2 are converted into N 2 O 5 by the plasma. There is an energy cost of ∼180 eV for every molecule of N 2 O 5 produced. The possible role played by surface and heterogeneous effects in the pellet bed reactor is considered.

Influence of non-thermal plasma after-treatment technology on diesel engine particulate matter composition and NOx concentration

“…Therefore, plasma has not been powerful enough to make any significant variation in nitrogen oxide concentrations before this point. It was found that NO is oxidised to NO 2 due to the existence of different active oxygen species and ozone as it is reported on previous studies (Mohapatro and Rajanikanth 2011;Arai et al 2004;Fitzsimmons et al 1999). NO concentration decreased by 72 % and NO 2 concentration increased by 77 % by applying maximum voltage at 13.5 kV during the experiments.…”

“…It should be noted that total NO x reduction cannot be concluded from considering the effect of plasma on NO, NO 2 and N 2 O only. Other nitrogen oxides such as NO 3 and N 2 O 5 can be formed during the process, and they should be considered in future applications (Fitzsimmons et al 1999). …”

Innovative Plasma Generation in Flexible Biopsy Channels for Inner‐Tube Decontamination and Medical Applications

“…Igniting a discharge in this gas composition leads to the formation of ozone (O 3 ), nitrogen dioxide (NO 2 ), carbon monoxide (CO), carbon dioxide (CO 2 ) and carbonyl fluoride (COF 2 ). Furthermore, a band at 1 720 cm −1 was detected and identified as dinitrogen pentoxide (N 2 O 5 ) 20…”

New Mechanisms for Ozone-Based ALD Growth of High-k Dielectrics via Nitrogen-Oxygen Species

“…[2] The N 2 gas reacts with O 3 in the ozone generator to create N 2 O 5 and N 2 O, which are known as stable products in N 2 /O 2 plasma reactions. [6] (Fig. 3).…”