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Thin Film Composite Membrane for Effective Raw Biogas Upgrading to Pipeline Quality Methane
Kárászová, Magda ; Vejražka, Jiří ; Veselý, Václav ; Friess, K. ; Randová, A. ; Jansen, J. C. ; Izák, Pavel
In this contribution we propose a method to upgrade biogas to the same quality of fuel standard natural gas. The latter contains more than 95 vol. % of methane. Using traditional membranes, such concentration of methane in the retentate could only be achieved using a multistep process. A recently proposed method for raw biogas purification from impurities and carbon dioxide by condensing water on swollen thin film composite membranes was found to be highly effective. The hydrophilic reverse osmosis membrane promotes the formation of a very thin selective water layer under condensing conditions below the dew point of the raw biogas feed. The large difference in permeability of the impurities in raw biogas (carbon dioxide, hydrogen sulfide) and methane through the water layer enables upgrading of raw biogas to biomethane quality in a single stage. Contrary to the classical purification processes, the proposed method does not require any biogas pretreatment, which makes this approach economically attractive. It represents an innovative approach to production of biomethane from biogas.
Plný tet: SKMBT_C22012102413470 -  PDF
Plný text: content.csg - PDF
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Komplexní geochemický výzkum interakcí a migrací organických a anorganických látek v horninovém prostředí: Průběh hydrodynamických zkoušek na vrtech PTP3 a PTP4 na lokalitě Potůčky - Podlesí
Stavební geologie Geotechnika, a.s. ; Český ekologický ústav, Praha ; Klepáč, L. ; Záruba, J. ; Rukavičková, L
Popis terénních prací na obou vrtech - dokončení vodních tlakových zkoušek v průběhu vrtání na vrtu PTP-3, instalace multipakrového systému a následný monitoring tlaků v jednotlivých etážích na vrtu PTP-3, vodní tlakové zkoušky v průběhu vrtání na později zhavarovaném vrtu PTP-4, hydrodynamické zkoušky v průběhu vrtání, dlouhodobé hydrodynamické zkoušky, stopovací zkoušky.
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Purification of Biogas by Means of Membranes
Poloncarzová, Magda ; Vejražka, Jiří ; Izák, Pavel
The aim of this work is to find a way to lower carbon dioxide concentration in biogas and to purify it from undesirable gases by means of membrane. Ideally only one or two steps should be used to make the technology feasible and profitable. Liquid membranes are used because of their high selectivity and good permeability. Successful biogas purification method would open new opportunities in ecological fuels, especially if the methane content in biogas reached more than 95%; biogas could then replace the natural gas. In this work, a new supported ionic liquid has been tested and the first results have been obtained. Sweeping gas permeation was performed with model mixture of CO2 and CH4 1:1.
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