Screening and engineering verification of a low energy consumption CO2 mixed amine absorbent
With the increasingly serious greenhouse effect,chemical absorption method,as the most promising technology for decarboniza-tion of coal-fired flue gas,has received wide attentionof China and abroad.The development of absorbents with low energy consumption,high stability and easy engineering application is a research hotspot at present.An absorbent scheme was proposed with high capacity and low energy consumption tertiary amine as the main absorbent,high kinetic primary amine and high stable cyclic amine as the auxiliary agent.An engineering development system has been formed,ranging from the selection of laboratory formula,the matching of 100 standard square meters per hour pilot energy-saving process to the optimization of the operation of 10 000 standard square meters per hour scale in-dustrial devices.Through the quick screening of absorbents was carried out through bubbling absorption experiment and absorption-regen-eration cycle experiment,and an absorbent formula with excellent performance was obtained through primary screening.Further,the ener-gy-saving process was optimized and its operation stability was verified through the test of 200 m3/h pilot plant and 10 000 tons of indus-trial plant.The test results show that the CO2 removal rate of the CEU type absorbent developed in this study reaches 90％,and the opti-mal energy consumption reaches 2.42 GJ/t CO2,and it has completed 700 hours of stable operation on the industrial device.
carbon capturechemical absorptionengineering developmentmixed aminecoal-fired flue gas
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