Effective treatment of residue of acrylic acid production using a fluid‐bed/fixed‐bed system with low energy consumption

Abstract In order to effectively deal with large amounts of complex organic pollutants in the harmful distillation residues with low energy consumption, a novel two‐stage fluid‐bed/fixed‐bed system was designed to catalyze oxidation of acrylic acid production residue. The effects of fluid‐bed temperature, gaseous hourly space velocity (GHSV), and oxygen excess rate on the purification of acrylic acid production residue in the two‐stage fluid‐bed/fixed‐bed system were studied to prove the feasibility of the method. The chemical oxygen demand (COD) of the discharged liquid was <100 mg/L, and the volatile organic compounds (VOCs) of the discharged gas amounted to <10 mg/m 3 with a fluid‐bed temperature of 380°C, emulsified residue's GHSV of 0.28 L/(kg cat ·hr), and O 2 excessive rate of…