Chlorine dioxide (ClO2) is a chemical used as a bleaching agent in the pulp bleaching process. At the integrated ClO2 plant PT. RAPP, ClO2 solution with a concentration of 9.9-10 ± 0.2 g/L is obtained through the process of absorbing ClO2 gas using Chilled Water in the absorber. This research aims to determine the effect of temperature, chilled water flow, water dilution flow on the absorption…