Kinetics of reactive absorption of carbon dioxide with solutions of aniline in carbon tetrachloride and chloroform

Kinetics of reactive absorption of carbon dioxide with solutions of aniline in commercially available chlorinated hydrocarbon solvents, namely, carbon tetrachloride and chloroform was studied in stirred cell and model stirred contactor at 303±1K, at atmospheric pressure. Carbon dioxide partial pressure was varied from 0.42 to 0.84 atm and concentration of liquid-phase reactant aniline was varied from 0.75 to 4.5 kmol/m^3. The reaction appeared to be first order with respect to carbon dioxide in the case of both the solvents used. The reaction order with respect to aniline was found to be zero in carbon tetrachloride and −0.4 in chloroform. The intrinsic kinetic rate constants at 303±1K were found to be 1.18×10^−3 s^−1 and 8.93×10^−4 (kmol/m^3)0.4 s^−1, in the case of carbon tetrachloride and chloroform, respectively, as solvents. These data are expected to be useful for the design and scale up of carbon dioxide absorbers in the process development for carbamates/isocyanates.