Simulation of sorption enhanced staged gasification of biomass for hydrogen production in the presence of calcium oxide
| Autor: | Shuang Wang, Qian Wang, Dongjing Liu, Shu Zhang, Xun Hu, Zhi-Xiang Xu, Bin Li, Christian Fabrice Magoua Mbeugang |
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| Rok vydání: | 2020 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Chemistry Energy Engineering and Power Technology Biomass Sorption 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Water-gas shift reaction 0104 chemical sciences Catalysis Steam reforming chemistry.chemical_compound Fuel Technology Chemical engineering Chemical equilibrium 0210 nano-technology Calcium oxide Hydrogen production |
| Zdroj: | International Journal of Hydrogen Energy. 45:26855-26864 |
| ISSN: | 0360-3199 |
| Popis: | A novel two-step sorption enhanced staged gasification of biomass for H2 production was proposed and studied using Aspen Plus software. An equilibrium model based on Gibbs free energy minimization was developed and validated. The results showed that the two-step process was more advantageous for H2 production compared with the conventional steam gasification and the one-step process. The independent control of each stage could realize a high temperature steam gasification in the first stage and a subsequent lower temperature steam reforming in the second stage, which thus promoted the gasification of biomass and benefited the water gas shift (WGS) reaction to produce more H2. Meanwhile, the in situ CO2 absorption of CaO in the second stage could enrich the H2 concentration in the product gas, and also further shifted the WGS reaction equilibrium to convert more CO to H2. With further introduction of catalyst for steam methane reforming (SMR), high-purity H2 with the concentration of 99.7 vol% and yield of 142.8 g/kg daf biomass could be achieved. |
| Databáze: | OpenAIRE |
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