High-purity hydrogen production by sorption-enhanced methanol steam reforming over a combination of Cu–Zn–CeO2–ZrO2/MCM-41 catalyst and (Li–Na–K) NO3·MgO adsorbent
| Autor: | Naghmeh Fallah, Maryam Hosseini Abbandanak, Majid Taghizadeh |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Sorbent Hydrogen Renewable Energy Sustainability and the Environment Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Catalysis Steam reforming chemistry.chemical_compound Fuel Technology Adsorption chemistry MCM-41 Methanol 0210 nano-technology Nuclear chemistry Hydrogen production |
| Zdroj: | International Journal of Hydrogen Energy. 46:7099-7112 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2020.11.250 |
| Popis: | In this study, sorption-enhanced methanol steam reforming (SEMSR) was applied to generate high-purity hydrogen. The mesoporous MCM-41 as support and CuO, ZnO, CeO2, ZrO2 as active agents and promoters were employed for the catalyst preparation. In addition, (Li–Na–K) NO3·MgO as a CO2 adsorbent was prepared by the wet mixing method. The fresh and used catalysts were characterized by XRD, BET, FTIR, FESEM, TEM, H2-TPR and TGA analyses. Also, the CO2 sorbent was studied by XRD, BET, FESEM, TEM and TGA analyses before and after the reaction. The SEMSR performances of the synthesized catalyst and adsorbent were evaluated experimentally in a fixed-bed reactor. The effect of various conditions such as temperature, WHSV, feed molar ratio and sorbent/catalyst ratio were investigated. The best results were obtained at 300 °C, a feed molar ratio (water/methanol) of 2:1, a WHSV of 1.62 h−1, and the sorbent/catalyst ratio of 8:1, which produced 99.8% hydrogen, 25% more than the hydrogen production during conventional methanol steam reforming. Moreover, the cyclic stability of the catalyst and the sorbent was studied for 10 cycles. |
| Databáze: | OpenAIRE |
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