Dissolution kinetics of borogypsum in di-ammonium hydrogen phosphate solutions
| Autor: | Havva Mumcu Şimşek, Rövşen Guliyev, Ayşe Vildan Beşe |
|---|---|
| Přispěvatelé: | 0-Belirlenecek |
| Rok vydání: | 2018 |
| Předmět: |
Work (thermodynamics)
Di-ammonium Hydrogen Phosphate Renewable Energy Sustainability and the Environment Chemistry 05 social sciences Batch reactor Inorganic chemistry Kinetics Energy Engineering and Power Technology 02 engineering and technology Activation energy 021001 nanoscience & nanotechnology Condensed Matter Physics Hydrogen phosphate Borogypsum Fuel Technology Reaction model 0502 economics and business Ammonium hydrogen phosphate 050207 economics 0210 nano-technology Dissolution |
| Zdroj: | International Journal of Hydrogen Energy. 43:20262-20270 |
| ISSN: | 0360-3199 |
| Popis: | This work examines the dissolution kinetics of borogypsum in di-ammonium hydrogen phosphate solutions ((NH 4 ) 2 PO 4 ) in a batch reactor. The parameters selected were the reaction temperature (15–53 °C), di-ammonium hydrogen phosphate concentration (1–4 M), stirring speed (50–800 rpm), and solid/liquid ratio (1/50–1/5). The dissolution rate increased by increasing the temperature (from 0.32 to 0.82), di-ammonium hydrogen phosphate concentration (from 0.35 to 0.821), and by decreasing solid-to-liquid ratio (from 0.77 to 0.24). The dissolution rate increased up to stirring speed of 600 rpm (from 0.135 to 0.56), and then decreased with increasing stirring speed (from 0.56 to 0.351). The dissolution rate was described by first-order pseudo-homogeneous reaction model. The activation energy of this study was calculated as 42.103 kJ mol −1 . A kinetics model including the used parameters in this study was suggested as follows: − ln ( 1 − X ) = 223.63 C 0.911 ( S / L ) − 0.7689 W 0.6212 e ( − 5064.2 / T ) t |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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