Process for the capture of co2 integrated into the melting of glass
AssigneeL'Air Liquide, Société Anonyme pour I'Etude et I'Exploitation des Procédéc Georges claude
InventorRemi TSIAVA
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Abstract
Glass melting process including the introduction of a vitrifiable solid charge into a furnace, heating and melting of charge thereby obtaining molten glass. Discharging the molten glass from the furnace and discharging a CO2-containing gaseous effluent from the furnace. The charge having at least one carbonate undergoing a dissociation reaction and releasing gaseous CO2 when heated and melted. The gaseous effluent discharged from the furnace being used to produce, at least one additive in the form of an alkali metal or alkaline earth metal carbonate, at least a part of which is incorporated in the charge which is introduced into the furnace.
Claims13
A glass-melting process comprising:
- a. introducing a vitrifiable solid charge into a furnace, the vitrifiable solid charge comprising at least one carbonate,
- b. heating and melting the charge in the furnace, thereby obtaining molten glass, the at least one carbonate undergoing a dissociation reaction and releasing gaseous CO2,
- c. discharging the molten glass from the furnace,
- d. discharging a CO2-containing gaseous effluent from the furnace, and
- e. utilizing the gaseous effluent discharged from the furnace to produce, by carbonation with the CO2 present in the gaseous effluent, at least one additive in the form of an alkali-metal or alkaline-earth-metal carbonate,
- wherein at least a part of said additive produced in stage e. is incorporated in the vitrifiable solid charge which is introduced into the furnace in stage a.,
- wherein the heat for heating the charge in stage b. is provided:
- by electric heating,
- by combustion of a non-carbon-based fuel with an oxidant, and/or
- both by combustion of a non-carbon-based fuel with an oxidant and by combustion of a carbon-based fuel with an oxidant.
Dependencies are inferred from the claim text.