Single-step purification of raw biogas to biomethane quality by hollow fiber membranes without any pretreatment – An innovation in biogas upgrading
| Autor: | Michal Žák, Karel Friess, Helena Bendová, Pavel Izák, Jason E. Bara |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
020209 energy Filtration and Separation 02 engineering and technology Energy consumption Pulp and paper industry Analytical Chemistry Membrane gas separation Membrane technology Pressure swing adsorption Membrane Biogas 0202 electrical engineering electronic engineering information engineering Fiber Data scrubbing |
| Zdroj: | Separation and Purification Technology. 203:36-40 |
| ISSN: | 1383-5866 |
| DOI: | 10.1016/j.seppur.2018.04.024 |
| Popis: | Herein, a radical innovation in biogas production is presented using a single-step membrane purification technology without any necessary pretreatment steps for contaminant removal and with the usage of low feed pressure. Asymmetric hollow fiber membranes with a thin, selective, non-porous layer made from polyester carbonate on the bore side were successfully used in a single-step raw biogas upgrading process at biogas plant Choťovice in the Czech Republic. A double-stage arrangement operated at 17 °C exhibited the best CO2/CH4 separation factor (β ∼ 23) with 96 vol% CH4 purity. This single-step biogas upgrading technology with highly H2S and water-resistant membrane modules allows reductions in capital expenditures of ∼20% and in operational expenditures of ∼50% compared to high-pressure water scrubbing (HPWS) and ∼70% compared to pressure swing adsorption (PSA). Due to the small energy consumption required merely for biogas compression, our units consumed around only ∼2 MJ/Nm3 CH4. Thus, our approach with significantly improved performance and robustness of the membrane separation process can be seen as a major breakthrough of membrane gas separation for inexpensive biogas production. |
| Databáze: | OpenAIRE |
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