dc.contributor.author | Uwaoma, R.C. | |
dc.contributor.author | Strydom, C.A. | |
dc.contributor.author | Bunt, J.R. | |
dc.contributor.author | Okolo, G.N. | |
dc.contributor.author | Matjie, R.H. | |
dc.date.accessioned | 2018-08-31T07:14:31Z | |
dc.date.available | 2018-08-31T07:14:31Z | |
dc.date.issued | 2019 | |
dc.identifier.citation | Uwaoma, R.C. et al. 2019. The catalytic effect of Benfield waste salt on CO2 gasification of a typical South African Highveld coal. Journal of thermal analysis and calorimetry, 135(5):2723-2732. [https://doi.org/10.1007/s10973-018-7589-9] | en_US |
dc.identifier.issn | 1388-6150 | |
dc.identifier.issn | 1588-2926 (Online) | |
dc.identifier.uri | http://hdl.handle.net/10394/30867 | |
dc.identifier.uri | https://doi.org/10.1007/s10973-018-7589-9 | |
dc.identifier.uri | https://link.springer.com/article/10.1007%2Fs10973-018-7589-9 | |
dc.description.abstract | The possible catalytic effect of a 5% loading by mass of crystallized salt from spent Benfield solution (SBFS) was investigated and compared with the catalytic influence of a 5 mass% loading of K2CO3 on the char–CO2 gasification reactivity of a bituminous medium rank C South African Highveld coal. The effect was investigated using known thermogravimetric investigation techniques. Coal char samples were prepared using the coal and catalyst-loaded samples by heating the samples in nitrogen to 1000 °C. The prepared char samples were further subjected to thermogravimetric analyses by heating them at isothermal temperatures between 900 and 990 °C in a CO2 atmosphere to simulate gasification reactions of the coal char. Results from isothermal char–CO2 gasification experiments showed that the catalyst-loaded coal samples exhibited higher gasification reactivities than the coal sample and the reactivities increased in the order: coal < coal + 5% SBF < coal + 5% K2CO3. It was observed that the relative initial reactivity of the catalyst-loaded samples increased in order of magnitude > 3.5 in comparison with the coal char sample. The addition of catalysts to the coal was found to reduce the estimated activation energies of the catalyst-loaded samples during the gasification process. The estimated activation energies (calculated from the initial reaction rate of the gasification reaction) of the samples were 215 kJ mol−1 for the coal char, 146 kJ mol−1 for the char from the coal + 5% SBF and 118 kJ mol−1 for the char from the coal + 5% K2CO3. The crystallized spent Benfield salt may be utilized as a CO2 gasification catalyst for coal | en_US |
dc.language.iso | en | en_US |
dc.publisher | Springer | en_US |
dc.subject | CO2 gasification reactivity | en_US |
dc.subject | Catalytic effect | en_US |
dc.subject | Spent Benfield salt | en_US |
dc.subject | K2CO3 | en_US |
dc.subject | Activation energy | en_US |
dc.title | The catalytic effect of Benfield waste salt on CO2 gasification of a typical South African Highveld coal | en_US |
dc.type | Article | en_US |
dc.contributor.researchID | 25452622 - Uwaoma, Romanus Chinonso | |
dc.contributor.researchID | 20682972 - Strydom, Christiena Adriana | |
dc.contributor.researchID | 20164200 - Bunt, John Reginald | |
dc.contributor.researchID | 22006303 - Okolo, Gregory Nworah | |
dc.contributor.researchID | 21166625 - Matjie, Ratale Henry | |