A process to treat a carbon dioxide comprising gas
AssigneePaqell B.V.
InventorsDandan LIU, Frederikus DE RINK, Johannes Bernardus Maria KLOK
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Abstract
The invention is directed to a process to convert carbon dioxide to methane by contacting an aqueous solution comprising dissolved carbon dioxide with an electron charged packed bed comprising of a carrier, suitably activated carbon granules, and a biofilm of microorganisms under anaerobic conditions, wherein more than 90 mol % of the dissolved carbon dioxide in the aqueous solution is present as a bicarbonate ion and/or as a carbonate ion.
Claims22
A process to convert carbon dioxide to methane by contacting an aqueous solution comprising dissolved carbon dioxide with an electron charged packed bed comprising of a carrier and a biofilm of microorganisms under anaerobic conditions,
- wherein more than 90 mol % of the dissolved carbon dioxide in the aqueous solution is present as a bicarbonate ion and/or as a carbonate ion.
A method to activate or reactivate a bioelectrochemical system comprising;
- an anode, and
- a biocathode comprising a packed bed comprising a carrier and a mixed
- culture of microorganisms from the sludge of an anaerobic wastewater treatment plant, by supplying an amount of current such that the cathode potential is more positive than the theoretical hydrogen evolution potential at −0.61 V vs Ag/AgCl (3M KCl) at a pH of 7 under anaerobic conditions and at a pH of greater than 8.
Dependencies are inferred from the claim text.