An Unreacted Shrinking Core Model for Calcination and Similar Solid-to-Gas Reactions
A variation on the unreacted shrinking core model has been developed for calcination and similar non-catalytic solid-to-gas decomposition reactions in which no gaseous reactant is involved and the reaction rate decreases with increasing product gas concentration. The numerical solution of the model...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Published: |
Taylor and Francis Ltd.
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/11930 |
| _version_ | 1848747936642498560 |
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| author | Amiri, Amirpiran Ingram, Gordon Maynard, N. Livk, I. Bekker, A. |
| author_facet | Amiri, Amirpiran Ingram, Gordon Maynard, N. Livk, I. Bekker, A. |
| author_sort | Amiri, Amirpiran |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | A variation on the unreacted shrinking core model has been developed for calcination and similar non-catalytic solid-to-gas decomposition reactions in which no gaseous reactant is involved and the reaction rate decreases with increasing product gas concentration. The numerical solution of the model has been validated against an analytical solution for the isothermal case. The model parameters have been tuned using literature data for the thermal dehydration (calcination) of gibbsite to alumina over a wide range of temperatures, from 490 to 923 K. The model results for gibbsite conversion agreed well with the published experimental data. A reaction order with respect to water vapor concentration of n = -1 was found to give a good fit to the data and yield activation energies consistent with literature values. Predictions of the non-isothermal unreacted shrinking core model compare well with a more complex distributed model developed previously by the authors. |
| first_indexed | 2025-11-14T06:57:04Z |
| format | Journal Article |
| id | curtin-20.500.11937-11930 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:57:04Z |
| publishDate | 2015 |
| publisher | Taylor and Francis Ltd. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-119302017-09-13T14:53:53Z An Unreacted Shrinking Core Model for Calcination and Similar Solid-to-Gas Reactions Amiri, Amirpiran Ingram, Gordon Maynard, N. Livk, I. Bekker, A. A variation on the unreacted shrinking core model has been developed for calcination and similar non-catalytic solid-to-gas decomposition reactions in which no gaseous reactant is involved and the reaction rate decreases with increasing product gas concentration. The numerical solution of the model has been validated against an analytical solution for the isothermal case. The model parameters have been tuned using literature data for the thermal dehydration (calcination) of gibbsite to alumina over a wide range of temperatures, from 490 to 923 K. The model results for gibbsite conversion agreed well with the published experimental data. A reaction order with respect to water vapor concentration of n = -1 was found to give a good fit to the data and yield activation energies consistent with literature values. Predictions of the non-isothermal unreacted shrinking core model compare well with a more complex distributed model developed previously by the authors. 2015 Journal Article http://hdl.handle.net/20.500.11937/11930 10.1080/00986445.2014.910771 Taylor and Francis Ltd. restricted |
| spellingShingle | Amiri, Amirpiran Ingram, Gordon Maynard, N. Livk, I. Bekker, A. An Unreacted Shrinking Core Model for Calcination and Similar Solid-to-Gas Reactions |
| title | An Unreacted Shrinking Core Model for Calcination and Similar Solid-to-Gas Reactions |
| title_full | An Unreacted Shrinking Core Model for Calcination and Similar Solid-to-Gas Reactions |
| title_fullStr | An Unreacted Shrinking Core Model for Calcination and Similar Solid-to-Gas Reactions |
| title_full_unstemmed | An Unreacted Shrinking Core Model for Calcination and Similar Solid-to-Gas Reactions |
| title_short | An Unreacted Shrinking Core Model for Calcination and Similar Solid-to-Gas Reactions |
| title_sort | unreacted shrinking core model for calcination and similar solid-to-gas reactions |
| url | http://hdl.handle.net/20.500.11937/11930 |