ChemInform Abstract: REACTIONS AT THE CARBON MONOXIDE, CARBON DIOXIDE!NICKEL ELECTRODE IN MOLTEN SODIUM CARBONATE

1982 ◽  
Vol 13 (11) ◽  
Author(s):  
K. Y. KIM ◽  
O. F. DEVEREUX
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Sodium Carbonate ◽  
Nickel Electrode ◽  
Molten Sodium

scholarly journals On the refraction and dispersion of carbon dioxide, carbon monoxide, and methane

1920 ◽  
Vol 97 (683) ◽  
pp. 152-159 ◽  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Refractive Index ◽  
Sodium Carbonate ◽  
Potassium Hydroxide ◽  
Visible Spectrum ◽  
Phosphorus Pentoxide

In continuation of previous work on the refraction and dispersion of gaseous elements and compounds within the limits of the visible spectrum, the refractivities of the gases named above were measured by the authors in 1914. Publication of results has been delayed by the war. Carbon Dioxide. The gas was prepared by heating a mixture of three parts of bichromate of potash and one part of sodium carbonate in vacuo and drying with phosphorus pentoxide. It was then condensed several times in liquid air and impurities pumped off. But, notwithstanding these precautions, tests by absorption in potassium hydroxide always indicated the presence of a small quantity (about 0.1 per cent.) of unabsorbed gas, which was assumed to be air and was allowed for in calculating the refractive index.

The reactions of some compounds of manganese with molten lithium carbonate-sodium carbonate-potassium carbonate eutectic

1983 ◽  
Vol 36 (1) ◽  
pp. 25 ◽  
Author(s):  
I Salarzadeh ◽  
SA Tariq
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Sodium Carbonate ◽  
Potassium Carbonate ◽  
Alkali Metals ◽  
Reaction Medium ◽  
Lithium Carbonate ◽  
Molten Lithium ◽  
Oxide Ions ◽  
Carbonate Melt

The reactions of MnO, MnCl2, MnCO3, MnSO4, Mn2O3, Mn3O4, MnO2 and KMnO4 with molten lithium carbonate-sodium carbonate-potassium carbonate eutectic were studied under argon as well as carbon dioxide atmospheres. Final products for MnCl2 reaction consisted of a mixture of oxy anions, MnO2- and MnO32-, and those for MnCO3 were MnO32- and Mn2O52- as were for the reactions of MnSO4 and MnO2. Mn2O3 and Mn3O4 reacted to form the oxy anion, MnO2-. KMnO4 decomposed to form initially a mixture of Mn7O164- and MnO42-. These oxy anions reacted further with the eutectic to produce the oxy anion, MnOS32-. Three alkali metals were present as cationic species with the above manganese oxy anions in different ratios. The carbonate melt acted both as a reaction medium and as a Lux-Flood base, that is a donor of oxide ions evolving carbon dioxide which was partly reduced to carbon monoxide in the reactions involving manganese(II) compounds. The stoichiometries of these reactions have been suggested. Manganese(II) oxide was found to be unreactive with the carbonate eutectic.

scholarly journals Controlled atmosphere GMAW welding of transportation vehicles and production machines parts made from 30MnB5 steel

2018 ◽  
Vol 216 ◽  
pp. 03001 ◽  
Author(s):  
Evgeny Ivanayskiy ◽  
Aleksei Ishkov ◽  
Aleksandr Ivanayskiy ◽  
Iakov Ochakovskii
Keyword(s):  
Mechanical Properties ◽  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Chemical Composition ◽  
Controlled Atmosphere ◽  
Shielding Gas ◽  
Reducing Atmosphere ◽  
Metal Composition ◽  
Gmaw Welding ◽  
Welding Materials

The paper studies the influence of shielding gas on the composition and the structure of weld joint metal of 30MnB5 steel applied in essential parts of automobiles and tractors. The welding was performed in inert, oxidizing and reducing atmospheres. It was established that TIG welding with argon used as shielding gas did not provide the required mechanical properties when using conventional welding materials. Carbon dioxide during MAG welding caused partial burning of alloying elements. Carbon monoxide used as shielding gas was proved to form reducing atmosphere enabling to obtain chemical composition close to the base metal composition. Metallographic examinations were carried out. The obtained results provided full-strength weld, as well as the required reliability and durability of welded components and joints.

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