Plasma oxidation of hydrocarbon

Electric energy cost is one of the cracial factors characterizing the plasma treatment HVLC VOC exhausts. To analyze the energy cost of VOC treatment in non-thermal plasma, we should point out that the mechanism of plasma oxidation of hydrocarbons can be generally... 

Plasma Oxidation of Hydrocarbon Templates in Bridged Polysilsesquioxanes Porous Materials by Design... 

Sobacchi, M. et al., Experimental assessment of combined plasma/catalytic system for hydrogen production via partial oxidation of hydrocarbon fuels, Int.. Hydrogen Energ., 27, 635, 2002. 

Non-Thermal Plasma Oxidation of Methane and Other Hydrocarbons with Production of Methanol and Other Organic Compounds... 

COMBINED PLASMA-CATALYTIC PRODUCTION OF HYDROGEN BY PARTIAL OXIDATION OF HYDROCARBON FUELS... 

Combined Plasma-Catalytic Approach Versus Plasma Catalysis in Processes of Hydrogen Production by Partial Oxidation of Hydrocarbons... 

Various perovsldtes have already demonstrated their efficiency in the total oxidation of hydrocarbons and chlorinated hydrocarbons in plasma-assisted processes. Thus, the total oxidation of propane and neopentane was investigated in a ferroelectric packed-bed reactor (FPR) in which the catalyst was a BaTiOs perovskite (Figure 17.12a) [57]. The gas streams were passed through the gas inlet and dispersed into the plasma zone. To explain the variation of CO and CO2 concentrations, a reaction pathway involving different precursors for the production of CO has been proposed. 

When hydrocarbons are present in the gas mixture, NO removal by oxidation to NOz occurs at much lower input energy and the reaction paths change significantly as compared to the case without hydrocarbons. Numerous works analyze the reaction mechanism of NO. conversion in non-thermal plasma with addition of hydrocarbons, especially ethylene [33,37,77,79,81-83], propylene [35,76,81,83-87], and propane [76,81,85,87],... 

The objective of plasma-assisted decomposition of hydrocarbons is to produce hydrogen and carbon in an oxidant-free environment (as opposed to plasma-assisted POx and steam reforming that produce hydrogen and C02), according to the following generic reaction ... 

Dielectric Loss. Usually, the dielectric loss of plasma polymerized hydrocarbon is larger than that of the conventional polymer by more than one order of magnitude. This difference is supposed to be caused by the oxidation of the film (J34). For both samples of PPE, a loss peak appeared at -30 °C at the measurement frequency of 1 KHz. The activation energy of this peak was 0.68 eV as shown in Fig. 8 for both samples. This value was almost same as... 

Cigarette smoke contains minute amounts of polycyclic aromatic hydrocarbons, such as benzol nr pyrene. which are potent inducers of microsomal cytochrome P-4S0 enzymes. This induction increases the oxidation of some drugs in nnokets. For example, theophylline is metabolized more rapidly in smokers than in nonsmokers. This difference is reflected in the marked difference in the plasma half-life of theophylline between smokers (r /2 4.1 hours) and non-smokers u A 7.2 hours). Other drugs, such as phenacetin. pentazocine. and propoxyphene, also reportedly undergo more rapid metabolism in smokers than in nonsmokers. " ... 

The general reaction pathways of NOjt in a plasma reactor arc summarized in Fig 8. The dominant removal pathway of NOjc in the gas-phase homogeneous reactions is oxidation than reduction for both electrical corona discharge and elec iron-beam, especially when the oxygen content is higher than around 3-4% [78. 88-90]. Oxidation of NO occurs mostly by ozone (R4) and peroxy radicals (R5, R6) in the presence of hydrocarbons. Some of NOj arc converted to NO by back reactions by UV (R2) and O radical. 

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