METHOD OR SYSTEM FOR EXTRACTION OF CARBON DIOXIDE Russian patent published in 2016 - IPC C07C29/151 C07C29/80 C10G3/00 C01B3/38 C01B31/20 B01D53/14 

FIELD: chemistry.

SUBSTANCE: invention relates to a method and a system for extraction of carbon dioxide at plant for synthesis of methanol from hydrocarbon gas or synthesis of petrol from hydrocarbon gas through methanol. Method includes a reforming step for obtaining converted gas by steam reforming of hydrocarbon gas, methanol synthesis step for synthesis of methanol from converted gas, combustion step for combustion of fuel gas to produce heat source for steam reforming reaction, carbon dioxide extraction step to extract carbon dioxide using absorbing liquid from waste gases of combustion generated by combustion, step of producing a plurality of heating media for converted gas or heating media for converted gas and methanol with different temperatures of converted gas or from converted gas and methanol and a step for regeneration of absorbing liquid for recovery of absorbing liquid by means of stepwise heating of absorbing liquid containing carbon dioxide absorbed therein, for removal of carbon dioxide from absorbing liquid, wherein heating is carried out using plurality of heating media with different temperatures.

EFFECT: invention allows effective use of waste heat of low-temperature converted gas.

12 cl, 9 dwg, 9 tbl