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Optimization of hydrogen production from a sorption-enhanced steam reforming process |
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| รหัสดีโอไอ | |
| Title | Optimization of hydrogen production from a sorption-enhanced steam reforming process |
| Creator | 1. Jantawan Vungvira 2. Amornchai Arpornwichanop |
| Publisher | Joint Graduate School of Energy and Environment |
| Publication Year | 2557 |
| Keyword | Sorption-enhanced steam reforming, Methanol, Hydrogen production, Simulation, Optimization |
| Abstract | The sorption-enhanced steam reforming is considered to be a suitable process for hydrogen production. By adding solid calcium oxide (CaO) to a reformer, carbon dioxide (CO2) is removed via a carbonation reaction and the yield of hydrogen is improved. The aim of this study is to find the optimal operating conditions of the sorption-enhanced steam reforming process using methanol as a hydrogen source. The fixed-bed reactor model in flowsheet simulator is applied to explain the sorption-enhanced steam reforming based on the kinetics of methanol steam reforming, methanol decomposition, water gas shift reaction and carbonation reaction. The sensitivity analyses of primary parameters of the sorptionenhanced steam reformer were performed and the obtained results were used for the optimization task with the aim to find its optimal operating conditions to maximize hydrogen yield with the presence of CO in the hydrogen product below 10 ppm. It was founded that the sorption-enhanced steam reformer should be run at the temperature of 347?C and steam-to-carbon feed ratio of 1.78. The maximum hydrogen yield of 3 mole hydrogen per mole methanol used is achieved and the CO content in the hydrogen product is less than 10 ppm. However, the net heat input required for the sorption-enhanced steam reforming process is about 52% higher than a conventional steam reforming process due to the combustion unit for CaO regeneration. |
| ISBN | 978-616-92228-1-1 |
