Plasma thermal decomposition

H. Bockborn and co-workers, "Production of Acetylene ia Premixed Flames and of Acetylene—Ethylene Mixtures," Chem. Ing. Pechnol. 44(14), 869 (1972). "Thermal Decomposition of Ethane ia a Plasma Jet," Rogyo Kagaku Zasshil4(9), 83 (1971). 

Hot RF and - DC plasma, are discharge, plasma jets Oxy-acetylene flames Low pressure microwave plasma, holt filament. Low pressure DC or RF glow discharge Thermal decomposition... 

The plasma chemical method for the thermal decomposition of solutions has been preferred over gas-flame heating for the following reasons [532] ... 

Additional confirmation of the approach can be found in the fact that mere thermal treatment of powder obtained from fluoride solutions by plasma chemical decomposition at 1000-1200K for 2-3 hours in air brings about a 100-300 fold reduction in fluorine content. Hence, the plasma chemical process and subsequent thermal treatment of the powder enables to obtain final products with fluorine contents as low as 10 2-10 3 % wt. 

Beta SiC powder from the decomposition of methyl-trichlorosilane (MTS) in the presence of hydrogen in an argon plasma. Also from the gaseous thermal decomposition of tetramethylsilane, Si(CH3)4, in a flowthrough reactor between 850 and 1500°CP 1 and by the reaction of acetylene and silane. 

Direct thermal decomposition of methane was carried out, using a thermal plasma system which is an environmentally favorable process. For comparison, thermodynamic equilibrium compositions were calculated by software program for the steam reforming and thermal decomposition. In case of thermal decomposition, high purity of the hydrogen and solidified carbon can be achieved without any contaminant. 

The high temperatures attainable in a plasma furnace, with no restrictions with regard to factors such as the furnace atmosphere or the crucible material, has made processing by thermal decomposition a practicable and useful method. A good example is the thermal decomposition of low-cost zircon (ZrSi04) to produce zirconium dioxide (Zr02). The fur-... 

Gulyaev and Polak [Kinetics and Catalysis, 6 (352), 1965] have studied the kinetics of the thermal decomposition of methane with a view toward developing a method for the commercial production of acetylene in a plasma jet. The following differential equations represent the time dependence of the concentrations of the major species of interest. 

Thermal plasma-assisted decomposition (cracking) of heavy hydrocarbons is reported in Ref. 141. Decomposition of paraffinic hydrocarbons including C16H34 by Ar-H2 plasma was carried out by continuous injection of the hydrocarbon in the spouted-bed reactor. Controlling temperature, residence time, and H2 concentration allows reaching the... 

Keywords Contaminated oil waste, biological degradation, thermal decomposition and plasma treatment, PCB s... 

The method of preparation is the most crucial and usually the least controllable variable, so much that it is usually taken as the last chance to explain any inconsistent behaviour. Unfortunately, this remains the least understood parameter, but also the most open one to originality and inventiveness. It is hard to list all methods, also because in many cases details have been left purposely obscure. However, to a first approximation, cathodes can be coated with an active layer by (i) electrodeposition [142], (ii) thermal decomposition [143], (iii) flame and plasma spraying [144-146], (iv) in situ activation [147, 148]. Cathodes may also be prepared from the powder... 

Thermal decomposition of tetramethylammonium or trimethylanilinium salts was described for phenytoin methylation prior to its GC analysis in plasma [556] and diethyl-stilbestrol in biological fluids [557], Usually a liquid or homogenized sample is extracted into toluene, the respective tetrasubstituted ammonium hydroxide is added and the liquid phase is injected at 260—290°C. 

Tseng et al. (51) reported the epoxy nanocomposites in which the nanotubes were functionalized by maleic anhydride by using plasma treatment. The thermal decomposition temperature was reported to increase with increasing the extent of the nanotubes in the composites as shown in Figure 2.16a. Untreated nanotubes were also used to reinforce the polymer and the increase in the decomposition temperature was also observed in this system as a function of filler content, but the enhancement was more significant using the functionalized nanotubes. This was attributed to... 

TD = thermal decomposition C = ceramic TB = Teflon-bonded RS = reactive sputtering E = electrochemical decomposition or formation SC = single crystal PJS = plasma jet spray. 

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