Influence of process parameters on enhanced hydrogen evolution from alcoholysis of sodium borohydride with a boric acid catalyst
| Autor: | Cafer Saka, Asım Balbay |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Hydrogen
Renewable Energy Sustainability and the Environment Inorganic chemistry Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Activation energy 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Catalysis Boric acid Sodium borohydride chemistry.chemical_compound Hydrolysis Fuel Technology chemistry Scientific method Methanol 0210 nano-technology |
| Zdroj: | International Journal of Hydrogen Energy. 45:16193-16200 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2020.04.094 |
| Popis: | The hydrogen evolution via alcoholysis reaction of sodium borohydride with an H3BO3 catalyst was carried out for the first time. In the process of methanol and NaBH4 (NaBH4-MR), the effects of the H3BO3 and NaBH4 concentration, and temperature parameters were examined and evaluated. The hydrogen yields by the NaBH4-MR, NaBH4 ethanolysis (NaBH4-ER) and NaBH4 hydrolysis reactions (NaBH4-HR) with 0.2 M H3BO3 catalyst are 99, 62, and 88% compared to the theoretical hydrogen yield, respectively. The completion times of the NaBH4-MR using the H3BO3 concentrations of 0.2, 0.4, 0.5, 1 M, and saturated acid solution were about 50, 15, 10, 2 and 1 min, respectively. The hydrogen yields obtained with 50, 15, 10, 2, and 1 min for the same acid concentration values were about 100% compared to the theoretical hydrogen value. By increasing the H3BO3 concentration from 0.2 M to the saturated H3BO3 concentration, the completion time of this NaBH4-MR process was reduced by approximately 50 times, resulting in a significant result. The activation energy (Ea) of the NaBH4-MR with the H3BO3 catalyst was 57.3 kJ/mol. |
| Databáze: | OpenAIRE |
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