dc.contributor.advisor | Svendsen, Hallvard Fjøsne | |
dc.contributor.author | Spinu, Dmitri | |
dc.date.accessioned | 2019-09-11T10:42:55Z | |
dc.date.created | 2015-06-15 | |
dc.date.issued | 2015 | |
dc.identifier | ntnudaim:13635 | |
dc.identifier.uri | http://hdl.handle.net/11250/2615677 | |
dc.description.abstract | In this thesis were investigated two reactions which take place in oxidation stage of Vitrisol® process. The oxidation of ferrous ions in aqueous solution by molecular oxygen, kinetics of which have been already determined under various conditions of temperature in range of T=50÷90 oC;, partial pressures of oxygen ranging from pO_2=225÷1800 (mbar) and various initial concentrations of cFe(+2)=0.0625÷1 (M), cFe(+3)=0.0625÷0.5 (M), cCu(+2)=0.015625÷0.5 (M), c_H2SO4=0.27÷2.0 (M). Based on experimental results, a rate equation was developed, described by kinetic parameters which were estimated in accordance with Newton-Raphson method, based on curve fitting. Based on curve fitting, a comparison of the simulated values with experimental data revealed that the model describes the oxidation kinetics well in accordance with following kinetic parameters:
- second order in ferrous ions
- 0.9 order in partial pressure of oxygen
- 0.25 order in cupric ions
- 0.2 order in sulfuric acid
- (-0.55) order in ferric ions
The activation energy involved has been found to be equal to 66.06 (kJ/mol).
The oxidation of copper monosulfide was investigated within three experiments performed at 90 oC; and 0.125 M initial concentration of cuprous ions. Conversion of cuprous ions into cupric ions was achieved in proportions of 80%, in a record time of 30±(5) minutes. | en |
dc.language | eng | |
dc.publisher | NTNU | |
dc.subject | Chemical Engineering | en |
dc.title | Kinetic study of ferrous sulfate and copper monosulfide oxidation in aqueous sulfate solution by molecular oxygen - Development of the Vitrisol process that is 100 % selective for H2S | en |
dc.type | Master thesis | en |
dc.source.pagenumber | 96 | |
dc.contributor.department | Norges teknisk-naturvitenskapelige universitet, Fakultet for naturvitenskap,Institutt for kjemisk prosessteknologi | nb_NO |
dc.date.embargoenddate | 10000-01-01 | |