Determination of optimum conditions for thermal regeneration and characterization of a spent bleaching earth
| Autor: | Suyanne Angie Lunelli Bachmann, Rita de Cássia Siqueira Curto Valle, Atilano Antonio Vegini, Lorena Benathar Ballod Tavares |
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| Rok vydání: | 2020 |
| Předmět: |
Thermogravimetric analysis
Materials science food.ingredient Scanning electron microscope 02 engineering and technology 010501 environmental sciences 01 natural sciences Soybean oil law.invention food Differential scanning calorimetry law Spectrophotometry Thermal medicine Chemical Engineering (miscellaneous) Waste Management and Disposal 0105 earth and related environmental sciences medicine.diagnostic_test Process Chemistry and Technology 021001 nanoscience & nanotechnology Pollution 0210 nano-technology Atomic absorption spectroscopy Earth (classical element) Nuclear chemistry |
| Zdroj: | Journal of Environmental Chemical Engineering. 8:103503 |
| ISSN: | 2213-3437 |
| DOI: | 10.1016/j.jece.2019.103503 |
| Popis: | In this study, the optimal conditions of the thermal regeneration, for a spent bleaching earth (SBE) used to bleaching of soybean oil was evaluated. In order to determine the optimal conditions, it was used the response surface method (RSM). The UV-VIS spectrophotometry assays were performed in the soybean oil to determine the bleaching performance. The similarities and differences between the activated bleaching earth (ABE), the spent bleaching earth (SBE) and the regenerated spent bleaching earth (RSBE) (only best regeneration result obtained) samples were evaluated by means of atomic absorption spectrophotometry (AAS), scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The bleaching performance of the regenerated spent bleaching earth (RSBE) ranged between 47.62–100 %, with the best result being obtained for assay at 600 °C during 90 min. The optimal conditions for the thermal regeneration suggested by model were 108 min at 587 °C (103%). The characteristics of the regenerated spent bleaching earth were similar to the activated bleaching earth (ABE). |
| Databáze: | OpenAIRE |
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