The combustion kinetics of a Samena pyrite ore

Simple item page
dc.contributor.authorNyamusika, Stanslaus Simon Manyori
dc.date.accessioned2021-04-20T14:01:05Z
dc.date.available2021-04-20T14:01:05Z
dc.date.issued1994
dc.descriptionAvailable in print form, East Africana Collection, Dr.Wilbert Chagula Library, class mark (THS EAF TN948.P8N9)en_US
dc.description.abstractThe thermo gravimetric experimental data on the direct oxidation of the Samena pyrite ore have been analysed by use of the sharp—interface, shrinking core model of behaviour. Two stages were discerned. The initial stage involved the crackling of the reactant solid and was controlled by diffusion into the unreacted solid with the activation energy of 4.8 kcal/ gmol. As the internal structure opened up, the participation of the chemical reaction mechanism increased with time resulting into a mixed control regime dominated by intrapellet diffusion, with the activation energy of 20.6 kcal/gmol. The errors inherent in the classical sharp—interface, shrinking core theory in the calculation of activation energies based on initial rates have been demonstrated in this work where initial rates of reactions have been shown not to be necessarily chemical reaction controlled. Chemical analysis suggested that the ore mainly consists of Fe '19 00 and S 39. by weight, other elements being present in minor quantities. The FeS2 has been estimated at 69% by weight. Most of the iron, as revealed by the Moessbaur effect analysis is present in the form of FeS2. A quick estimate of the air supply requirements to a fixed bed reactor of known dimensions and load has been illustrated from the present experimental data.en_US
dc.identifier.citationNyamusika, Stanslaus Simon Manyori (1994) The combustion kinetics of a Samena pyrite ore , Masters dissertation, University of Dar es Salaamen_US
dc.identifier.urihttp://41.86.178.5:8080/xmlui/handle/123456789/15141
dc.language.isoenen_US
dc.publisherUniversity of Dar es Salaamen_US
dc.subjectPyritesen_US
dc.subjectTanzaniaen_US
dc.titleThe combustion kinetics of a Samena pyrite oreen_US
dc.typeThesisen_US

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Stanslaus Simon Manyori Nyamusika.pdf
Size:
78.34 KB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Masters Dissertations