Sttudy on the Oxidation Mechanism of Mixed Thiols in Light Oil Sweetening 2. Kinetics and Mechanism of Catalytic Cooxidation of Mixed Thiols Ln Gas-Liquid System

A Review on Gas‐Liquid Reactions in Light Oil Sweetening: Kinetics and Reactor Design Aspects

“…(4) and (5) compares well with kinetic studies conducted by Xia et al [22] using phthalocyanine based catalysts for thiol oxidation.…”

“…To be able to determine the true kinetics representing industrial conditions, it is necessary to establish hydrodynamics which ensures maximum transport of oxygen to the bulk. Substantial literature is available on mass transfer effects and reaction kinetics studies on thiol oxidation by Van de Vusse [20], Pal and Sharma [25], Leitao and Rodrigues [21], Xia et al [22,26,27], Ganguly et al [16,[28][29][30][31], and Ehsani et al [23,32]. They studied the mass transfer, kinetics, and mechanism of catalytic co-oxidation of pure and mixed thiols (ethanethiol, iso-propanethiol, 1-butanethiol, 1-octanethiol, and 2-methyl-2-propanethiol) in gas-liquid and gas-solid-liquid systems.…”

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 formation of the unsymmetrical disulfide 2 reveals that the interaction between 1-butanethiol and 2-methyl-2propanethiol also exists in heterogeneous catalytic systems. But the smaller mole percentage of unsymmetrical disulfide in the heterogeneous system than that in the homogeneous system 4,5 implies that the 1-butanethiol radical and the 2-methyl-2-propanethiol radical do not easily approach each other on the surface of the catalyst support because of steric hindrance.…”

“…Basic research provides the preliminary knowledge and guidance for the industrial process, and a number of research studies have been made. − Until quite recently, we focused on the research of the cooxidation of mixed thiols and found that the kinetics and mechanism of the catalytic cooxidation of mixed thiols are more reasonable than that of an individual thiol for the theoretical elucidation of the oxidation sweetening process of light oil. In homogeneous catalytic cooxidation of mixed thiols, interactions of different types of mercaptans were found to exist and the cooxidation mechanisms were proposed by us. , To provide information concerning the practical industrial fixed-bed sweetening process in which the sour hydrocarbon distillate, together with air and alkaline base or Merox CF, is passed at the operating temperature and pressure in contact with the catalyst bed (activated carbon impregnated with cobalt-sulfonated phthalocyanine (CoSPc)) in a reactor, − it is necessary to make a further study of the apparent catalytic kinetics of the cooxidation of mixed thiols in gas−liquid−solid systems.…”

“…In homogeneous catalytic cooxidation of mixed thiols, interactions of different types of mercaptans were found to exist and the cooxidation mechanisms were proposed by us. 4,5 To provide information concerning the practical industrial fixedbed sweetening process in which the sour hydrocarbon distillate, together with air and alkaline base or Merox CF, is passed at the operating temperature and pressure in contact with the catalyst bed (activated carbon impregnated with cobalt-sulfonated phthalocyanine (CoSPc)) in a reactor, [6][7][8] it is necessary to make a further study of the apparent catalytic kinetics of the cooxidation of mixed thiols in gas-liquid-solid systems.…”