Modeling of a Liquid–Liquid–Solid Heterogeneous Reaction System: Model System and Peroxyvaleric Acid

Abstract

A mathematical model was developed to interpret a liquid-liquid-solid heterogeneous reaction system using valeric acid (pentanoic acid) perhydrolysis as model. Kinetic, thermodynamic and mass transfer parameters were included in this model. Perhydrolysis of valeric acid (pentanoic acid) on Amberlite IR-120 catalyst experiments were carried out in the temperature range of 40-60°C and with an initial valeric acid concentration of 50 wt.%. The influence of water and the acid catalyst was taken into account to develop a suitable kinetic model. The thermodynamic parameters, such as the reaction enthalpy ( 0 R ΔH ) and the molar equilibrium ratio (m) were determined experimentally. The kinetic parameters were determined by non-linear regression analysis and they were statistically wellidentified. The standard reaction enthalpy was estimated to -13.84 kJ.mol -1 and the activation energy of the reaction was estimated to 64.5 kJ.mol -1 .

Influence of ring‐opening reactions on the kinetics of cottonseed oil epoxidation

“…Based on their observation, this induction period seems to be linked to the polar effect of the aqueous phase. The concentration of protons can affect the value of the surface tension, which interferes with the interfacial area …”

Catalytic developments in the epoxidation of vegetable oils and the analysis methods of epoxidized products

“…The experiments also revealed that a gelular resin with a particle size of more than 0.1 mm and 8% cross-linking degree (i.e., Amberlite IR-120) showed better resistance to deactivation. 140 To conclude, the degree of cross-linking plays a major role in the efficiency of the resins because a higher degree of cross-linking makes the reaction rate slower and the lower one can deactivate during the reaction. 141 Technological parameters such as temperature, catalyst loading, carboxylic acid to double bond ratio, hydrogen peroxide to double bond ratio, and stirring speed are optimized Table 3 Processing parameters for the epoxidation of vegetable oils using acidic ion exchange resins Table 3.…”

Interaction of thermal and kinetic parameters for a liquid–liquid reaction system: Application to vegetable oils epoxidation by peroxycarboxylic acid

“…By using the same methodology as described in an article of our group [23], mass transfer coefficient of peroxyformic acid in aqueous was estimated by using Calderbank and Moo-Young correlation and diffusion coefficient of peroxyformic acid in organic phase was estimated by using the correlation of Scheibel. The Hatta number was found to be lower than 1 so interfacial mass transfer can be assumed to be rapid.…”