Study on the oxidation mechanism of mixed thiols in light oil sweetening. 3. Apparent kinetics of the catalytic cooxidation of mixed thiols in gas-liquid-solid systems

The effects of oxygen pressure, temperature, catalyst loading, and particle size of the catalyst support on the cooxidation reaction of mixed thiols w ere studied systematically in gas-liquid-solid systems. The results have sh own that the pore diffusional resistance is the main factor limiting the re action and the overall cooxidation reaction kinetics is zero order in oxyge n and first order in mercaptan. The diffusion-controlled rate law can be re presented as r = k(obs)C(RSH). A discussion is presented for the industrial sweetening operation based on the research.