Kinetic Study of the Insertion and Deinsertion of Carbon Dioxide intofac-(CO)3(dppe)MnOR Derivatives

2003 ◽  
Vol 22 (26) ◽  
pp. 5585-5588 ◽  
Author(s):  
Donald J. Darensbourg ◽  
Way-Zen Lee ◽  
Andrea L. Phelps ◽  
Erin Guidry
Keyword(s):  
Carbon Dioxide ◽  
Kinetic Study

Kinetic study of carbon dioxide absorption with aqueous potassium carbonate promoted by arginine

2013 ◽  
Vol 222 ◽  
pp. 478-487 ◽  
Author(s):  
Shufeng Shen ◽  
Xiaoxia Feng ◽  
Ruihong Zhao ◽  
Ujjal Kumar Ghosh ◽  
Aibing Chen
Keyword(s):  
Carbon Dioxide ◽  
Kinetic Study ◽  
Potassium Carbonate ◽  
Carbon Dioxide Absorption

Thermodynamic and Kinetic Study of Leaching Magnesia from Natural Magnesites by Carbon Dioxide

2011 ◽  
Vol 309-310 ◽  
pp. 261-264 ◽  
Author(s):  
S. Klochkovskii ◽  
A. Smirnov ◽  
U. Shabalina
Keyword(s):  
Carbon Dioxide ◽  
Particle Size ◽  
Kinetic Study ◽  
Calcination Temperature ◽  
High Purity ◽  
Magnesium Carbonate ◽  
Carbon Dioxide Partial Pressure ◽  
Pressure Leaching ◽  
Translation Process ◽  
Carbon Dioxide Pressure

The applicability of carbon dioxide pressure leaching for the extraction of high purity magnesia from natural magnesites has been investigated. Factors which have influence on the magnesia recovery such as time, temperature, pressure, particle size and calcination temperature have been studied. Optimum values were determined: calcination temperature was in the range 650 – 750 0C, time of the calcination was approximately 5 – 3 hours; carbon dioxide partial pressure leaching for the extraction of magnesia was about 3 bar; particle size was between 0,2 – 0,6 mm. A kinetic study of carbonation of MgO has been investigated at leaching temperature from 00C to 50 0C. Two processes were observed: the formation of a magnesium bicarbonate solution and the precipitation of magnesium carbonate. Our research has determined that the concentration of impurities in magnesium carbonate is virtually no different from their concentration in natural magnesites. Apparently, the formation of magnesium carbonate proceeds without destruction of structure. So the extraction of high purity magnesia from natural magnesites by carbon dioxide is only possible using magnesium bicarbonate. It is necessary to optimize the translation process of magnesium in solution and the technology of extraction of pure MgO from it to generate high purity magnesium on an industrial scale.

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