System and method for preparing methanol by hydrogenation of carbon dioxide and coupling purge gas to prepare ethanol

• Main Authors: YANG HECHEN, WU QIRONG, CHEN JIANHONG, SHU BIN, YU JIANGTAO, GONG RUIJIE, ZHOU CHUANXIONG, WANG JIN, WU MENGLI, NI MING, YU XIA, YANG YANG, SHI XU, XIONG JIAN
• Format: Patent
• Language: Chinese; English
• Published: 09.05.2023
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; BEER; BIOCHEMISTRY; CHEMISTRY; ENZYMOLOGY; FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE; METALLURGY; MICROBIOLOGY; MUTATION OR GENETIC ENGINEERING; ORGANIC CHEMISTRY; PROCESSES USING MICROORGANISMS; SPIRITS; VINEGAR; WINE

The invention discloses a system and a method for preparing ethanol by coupling purge gas with methanol prepared by hydrogenation of carbon dioxide. The system for preparing ethanol by coupling purge gas with methanol prepared by hydrogenation of carbon dioxide comprises a compressor, a reactor, a separator, a rectification system and a biological fermentation system, the compressor is provided with a first gas inlet, a recycle gas inlet and a first gas outlet; the reactor is provided with a second gas inlet and a second gas outlet, the second gas inlet is communicated with the first gas outlet, and the second gas outlet is communicated with the hot side inlet of the cooler; the separator is provided with a third gas inlet, a third gas outlet and a liquid outlet, and the third gas inlet is communicated with the hot side outlet of the cooler; the third gas outlet is divided into two paths, one path is communicated with the circulating gas inlet, and the other path is communicated with a purge gas pipeline; and