Absorption and decomposition of ozone in a three-phase split-rectangular airlift reactor under ultrasonic irradiation Available to Purchase

Ozone absorption was investigated in a three-phase split-rectangular airlift reactor under ultrasonic irradiation using γ-Al₂O₃ as catalyst. The reactor consisted of a square column (50 × 50 mm) with the height of 120 mm, divided into a riser and a downcomer by a baffle, 50 mm in width, 4 mm in thickness and 50 mm in total height. An absorption kinetic model was proposed to determine the volumetric mass transfer coefficient of ozone k_La_A. The results showed that k_La_A increased from 0.409 to 0.712 min⁻¹ as power density rose from 27.2 to 100.3 W L⁻¹, comparing with 0.242 min⁻¹ in the absence of ultrasonic irradiation. The increase in gas flow rate and catalyst loading also favored the increase of k_La_A. The degassing effect due to ultrasonic irradiation could be ignored in the ozone absorption process.