Plasma catalyst

The plasma-catalyst system utilizes plasma to oxidize NO to NO2 which then reacts with a suitable reductant over a catalyst however, this plasma-assisted catalytic technology still comprises challenging tasks to resolve the formation of toxic by-products and the catalyst deactivation due to the deposition of organic products during the course of the reaction as well as to prepare cost effective and durable on-board plasma devices [47]. 

The reactions that occur to auto-exhaust emissions when exposed to plasma include oxidation of HCs, carbon monoxide, and partially diesel PM also. Nitric oxide (NO) can be oxidized by plasma to N02. Plasma alone, due to its oxidizing character, is not a viable NO control method. However, combinations of plasma with catalysts, referred to as plasma-assisted catalysts or simply plasma catalysts , have been suggested for NO reduction. The plasma is believed to show potential to improve catalyst selectivity and removal efficiency. Current state-of-the-art plasma catalysts have efficiencies comparable to those of active DeNO systems, removing about 50% of NO at a fuel economy penalty of less than 5% [85],... 

The preceding results suggest an advantageous plasma-catalyst coupling effect on the NO remediation, in full accordance with the proposed mechanism [38], The C H Oz and RNO compounds, produced by the non-thermal plasma before the catalytic reactor... 

Application of Plasma-Catalyst Hybrid Processes for the Control of NOx and Volatile Organic Compounds... 

Application ol Plasma-Catalyst Hybrid Processes tor the Control ol NUx. .. 3... 

Application ot Plasma-Catalyst Hybnd Processes tor the Control ot NOx. .. 

Many of recent works on the plasma-catalyst process for NQr removal arc based on PCC system. Because of the similarity in the catalytic reactions between the PEC process and the conventional SCR process, NO.r removal method using PEC system is also referred to as plasma-enhanced selective catalytic reduction (PE-SCR) process [109], Table 4 summarizes the current status of NO r removal using the PE-SCR process. It should be noticed that the use of proper chemical reducing agent is necessary to achieve reductive decomposition of NO.r even with the plasma-catalyst system. To optimize the reductive decomposition of NO.r, therefore, it is necessary to find proper reducing agent together with a catalyst. The main role of NTP in the PEC system is the partial conversion of NO to NO . This partial oxidation of... 

Decomposition of VOCs Using THE Plasma-Catalyst Process... 

As an alternative to the conventional and widely studied plasma-catalyst coupling, a sequential approach has also been proposed whereby pollutants are first adsorbed onto the material and then oxidized by switching on the plasma [55]. 

Thevenet F., Sivachandiran, L., Guaitella, O., Barakat C., and Rousseau, A. (2014) Plasma-catalyst coupling for volatile organic compound removal and indoor air treatment a review./. Phys. D Appl. Phys., 47 (22), 224011. 

Figure 6.3. The percentage destruction of EXHM (solid bars) and the NOx formation (open bars) for various zeolite materials used in a two-stage plasma catalyst configuration for the remediation of 500 ppm DCM in an atmospheric pressure air stream. Adapted from. ...

Figure 6.10. Schematic diagram of a cycled plasma catalyst/adsorbent system. Adapted from. ...

Kim, H.-H., Ogata, A. and Futamura, S. (2006). Applications of Plasma-Catalyst Hybrid Processes for the Control of NOx and Volatile Organic Compounds, in Trends in Catalysis Research, Bevy, L.B. (ed.) Nova Science Publishers Inc. New York. pp. 1-50. 

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