Recovery method of absorption solvent waste liquid and co2 capture method

Abstract

A recovery method of absorption solvent waste liquid and a CO2 capture method are provided. The recovery method includes providing mixed slurry of adsorbent and absorption solvent waste liquid; and performing reaction on the mixed slurry at 60-150° C. under ultrasonic and sealing conditions; wherein the adsorbent is solid waste containing alkaline substances. According to the disclosure, solid waste containing alkaline substances is used as an adsorbent to treat the absorption solvent waste liquid, so that toxic and carcinogenic diethylene glycol and other harmful substances formed by self-polymerization in the absorption solvent waste liquid can be adsorbed on the solid waste, and the removal rate can reach more than 88%. After this treatment, the obtained absorption solvent waste liquid can be recycled. In addition, the use of solid waste as adsorbent has low production cost, and the waste can also be used as solid waste.

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