Kinetics and mechanism of catalytic oxidation of sodium ethyl mercaptide
AbstractCatalytic oxidation desulfurization of gasoline is a key process for the
utilization of petroleum hydrocarbons. However, the inherent mechanism
still remains unclear and the kinetic investigation is usually performed
in processes with limited mass transfer rates. Herein, the kinetics and
mechanism of catalytic oxidation of sodium ethyl mercaptide were
investigated with microfluidics. On the basis of eliminating mass
transfer resistance, the effects of temperature, pressure, residence
time, and gas-liquid flow ratio on the oxidation were assessed.
According to the results of UV-vis spectra and binding constant, it was
confirmed that the catalytic center was in the form of dimer. A
heterogeneous reaction kinetic model was proposed as such. The kinetic
parameters close to intrinsic kinetics and corresponding kinetic rate
expression were obtained.