Method for improving carbon dioxide recovery rate and purity by solution recycling and regeneration

The invention relates to a method for improving carbon dioxide recovery rate and purity by solution recycling and regeneration. In the low-pressure methanol wash process, lean methanol firstly absorbs CO2 through a CO2 absorption tower, and methanol solution rich in the CO2 is regenerated. On one ha...

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Bibliographische Detailangaben
Hauptverfasser:	WANG GUI, ZHOU ENLI, SHANG SHUJUAN, DIAO XIUHUI, GUAN JIE, WU XIANGNAN, LI XIAO, WANG QIAOYI, LI GANG, ZHANG QIYU, SHI JIANMIN, ZHANG FENGJUAN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CHEMISTRY FUELS LUBRICANTS METALLURGY PEAT PETROLEUM, GAS OR COKE INDUSTRIES PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLEGASES CONTAINING CARBON MONOXIDE TECHNICAL GASES CONTAINING CARBON MONOXIDE
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Beschreibung
Zusammenfassung:	The invention relates to a method for improving carbon dioxide recovery rate and purity by solution recycling and regeneration. In the low-pressure methanol wash process, lean methanol firstly absorbs CO2 through a CO2 absorption tower, and methanol solution rich in the CO2 is regenerated. On one hand, the CO2 absorbed and dissolved by the methanol solution is desorbed to obtain high-purity CO2 product gas (CO2 mole fraction >=99%, maximally reaching 99.9%). On the other hand, semi-lean methanol solution (CO2 mole fraction