A Study of Chemical Reactions in Molten Sodium-Potassium Bisulfate Eutectic. I. The Reactions of Metals

1979 ◽  
Vol 32 (6) ◽  
pp. 1385 ◽  
Author(s):  
BJ Meehan ◽  
SA Tariq
Keyword(s):  
Chemical Reactions ◽  
Protective Coating ◽  
Sodium Potassium ◽  
Molten Sodium ◽  
Quantitative Results

The reactions of 18 metals with molten sodium-potassium bisulfate eutectic were studied. Results obtained isothermally at 200�C indicated that Al, V and Au did not react with the melt; Na, Mg, Mn and Zn reacted to produce H2; Co, Ni, Cu, Ag, Sn, Hg and Pb produced SO2 and H2O; while Ti, Cr, Fe and Cd produced H2, H2O and SO2. Reactions in general were slow and, due to formation of a protective coating on the surface, metals reacted only partly, with the exception of Na, Cu, Ag and Zn which reacted and dissolved in the melt completely. Due to partial reactions mostly qualitative or semi-quantitative results were obtained and possible reaction stoichiometries have been suggested.

A study of chemical reactions in molten sodium-potassium hydrogen sulfate eutectic. III. The reactions of anions

1980 ◽  
Vol 33 (3) ◽  
pp. 647 ◽  
Author(s):  
BJ Meehan ◽  
SA Tariq
Keyword(s):  
Chemical Reactions ◽  
Inorganic Anions ◽  
Hydrogen Sulfate ◽  
Reaction Products ◽  
Potassium Salts ◽  
Sodium Potassium ◽  
Molten Sodium ◽  
Potassium Hydrogen

The reactions of 11 inorganic anions added as their sodium or potassium salts to molten sodium-potassium hydrogen sulfate eutectic were studied and their stoichiometries elucidated. It was found that Na2CO3, NaNO2, KNO3, Na2SO3 and Na2S2O3 reacted with the melt to form water and CO2, NO+NO2, NO2+O2, SO2, S6+SO2 respectively. NaCl, KBr produced HCl and HBr while KI reaction products consisted of I2, SO2 and H2O; K2CrO4 and K2Cr2O7 were converted into H2CrO4 and H2Cr2O7 respectively. These acids decomposed to H2O, O2 and Cr2O3 which reacted further with the melt to produce H2O and Cr2(SO4)2,H2O. K2S2O8 was found to decompose thermally to O2 and K2S2O7 without reacting with the melt.

A Study of Chemical Reactions in Molten Sodium-Potassium Hydrogen Sulfate Eutectic. II. The Reactions of Metal Oxides

1979 ◽  
Vol 32 (11) ◽  
pp. 2555 ◽  
Author(s):  
BJ Meehan ◽  
SA Tariq
Keyword(s):  
Sulfur Dioxide ◽  
Metal Oxides ◽  
Chemical Reactions ◽  
Hydrogen Sulfate ◽  
Sodium Potassium ◽  
Molten Sodium ◽  
Potassium Hydrogen

The reactions of sixteen metal oxides with molten sodium-potassium hydrogen sulfate eutectic were studied. It was found that Ag2O, MgO, ZnO, COO, NiO, CuO, Al2O3, Fe2O3 and V2O5 reacted with the melt to produce their respective melt-soluble cations, sulfate and water, while CaO, BaO, Cr2O3 and SnO2 reacted to form insoluble metal sulfates and water. Whereas manganese(IV) oxide reacted with the melt to produce manganese(III) sulfate, water and oxygen, tin(IV) oxide reacted to form tin(IV) sulfate, water and sulfur dioxide. The stoichiometries of these reactions have been determined.

Investigation and Properties of the Discharge in Dielectric Barrier Reactors Decomposition of Toluene, o-Xylene, Trichloroethylene, and Their Mixture Using a BaTiO3 Packed-Bed Plasma Reactor

1996 ◽  
Vol 1 (1) ◽  
Author(s):  
Gerhard J. Pietsch
Keyword(s):  
Dielectric Barrier Discharge ◽  
Chemical Reactions ◽  
Barrier Discharge ◽  
Plasma Reactor ◽  
Packed Bed ◽  
Generation Process ◽  
Dielectric Barrier ◽  
Process Gas ◽  
Spatially Distributed ◽  
Quantitative Results

AbstractThe dielectric barrier discharge consists of numerous non-thermal microdischarges which are temporally and spatially distributed within the reactor volume. From a refined modeling of microdischarges, chemical reactions, and the interaction of discharges and process gas, the properties of the reactor can be evaluated. Quantitative results for the ozone generation process are presented.

scholarly journals Dispersion of light by Potassium Vapour

1910 ◽  
Vol 84 (570) ◽  
pp. 209-225 ◽  
Keyword(s):  
Wave Length ◽  
Principal Series ◽  
Visible Spectrum ◽  
Ultra Violet ◽  
Anomalous Dispersion ◽  
Present Communication ◽  
Absorption Region ◽  
Sodium Potassium ◽  
Light Passing ◽  
Quantitative Results

Anomalous dispersion in the region of the red lines of potassium was first observed by Ebert in 1904. The method adopted for Ebert’s experiments was a modified form of the crossed prism method used by Wood in the investigation of the corresponding phenomena in the case of sodium. Potassium was heated in a tube through which two currents of hydrogen passed from each end to a central outlet. The cool hydrogen kept the potassium vapour in a prismatic form, so that light passing along the length of the tube suffered deviation and dispersion by the potassium vapour prism. The author of the present communication has shown that there is no need for the hydrogen streams. If the tube be kept cool on its upper surface the metallic vapour takes of itself a prismatic form or is arranged in layers of decreasing density, and so behaves in a similar way to a prism of homogeneous vapour. The present communication deals with quantitative results from the measurement of dispersions at different wave-lengths, and it appears that the deviation due to potassium vapour is observable over the whole of the visible spectrum and for a considerable distance in the ultra-violet. Strong absorption takes place at the lines of the principal series and for wave-lengths near these series lines we have "anomalous" dispersion. This phenomenon has been observed at seven of the pairs forming the principal series lines for potassium—as the pairs of lines in this series get closer and closer together with diminishing wave-length, the dispersion effects after the first two pairs are only observable outside the lines forming a pair, but there appears a lack of symmetry in the observed dispersion curves corresponding to the different intensities of the lines forming the pair. The dispersion to be observed may then be regarded as that corresponding to the principal series absorption lines; no other absorption region seems to affect the dispersion —at any rate at low densities of vapour.

A Study of Chemical Reactions in Molten Sodium Hydrogen Sulfate Potassium Hydrogen Sulfate Eutectic. V. The Reactions of Eleven Acetates

1994 ◽  
Vol 47 (3) ◽  
pp. 571
Author(s):  
N Mohamed ◽  
SA Tariq
Keyword(s):  
Volatile Product ◽  
Hydrogen Sulfate ◽  
X Ray Diffraction ◽  
Sodium Potassium ◽  
Mass Spectral ◽  
Molten Sodium ◽  
Sodium Hydrogen ◽  
Potassium Hydrogen ◽  
Infrared Methods ◽  
Potassium Magnesium

The reactions of the acetates of lithium, sodium, potassium, magnesium, calcium, strontium, barium, manganese, cobalt, zinc and lead with molten sodium hydrogen sulfate-potassium hydrogen sulfate eutectic were investigated by means of thermogravimetry, differential thermal analysis, X-ray diffraction, mass spectral and infrared methods. In these acid-base reactions, the metal acetates were found to be converted into the corresponding metal sulfates, and acetic acid was the volatile product of each reaction. The temperatures and stoichiometries of the reactions have been determined.

Electrical Conductivity of Zirconium Tetrachloride Solutions in Molten Sodium, Potassium and Cesium Chlorides

2019 ◽  
Vol 74 (10) ◽  
pp. 925-930
Author(s):  
Alexander B. Salyulev ◽  
Alexei M. Potapov
Keyword(s):  
Electrical Conductivity ◽  
Vapor Pressure ◽  
Zirconium Tetrachloride ◽  
Sodium Potassium ◽  
Molten Sodium ◽  
Electrical Conductivities ◽  
Industrial Use ◽  
First Time

AbstractThe electrical conductivities of the MCl-ZrCl4 (M = Na, K, Cs) melts at the ZrCl4 concentration of <33 mol.% were studied within the range of concentrations and temperatures at which the vapor pressure above the melt is <1 atm. Such melts are of interest for industrial use. The conductivities of the molten KCl-ZrCl4 (10–25 mol.% ZrCl4) and CsCl-ZrCl4 (10–30 mol.% ZrCl4) solutions were measured for the first time. The data on the conductivities of the NaCl-ZrCl4 melts with the ZrCl4 concentration ranging from 10.5 to 25.5 mol.% were refined. In all cases studied, results showed that the conductivity of the melts increased as the temperature increased and that the conductivity of the melts decreased as the concentration of ZrCl4 increased. The same tendency was observed in a series of NaCl-ZrCl4, KCl-ZrCl4 and CsCl-ZrCl4 melts.

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