Kinetic and thermodynamic study of the liquid-phase etherification of isoamylenes with methanol

Journal Article · Wed Feb 01 04:00:00 EST 1995 · Industrial and Engineering Chemistry Research; (United States)

DOI:https://doi.org/10.1021/ie00041a011· OSTI ID:6775664

Piccoli, R L ^[1]; Lovisi, H R ^[2]

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1. Copesul-Cia Petroquimica do Sul, Triunfo (Brazil)
2. Petroflex-Ind. e Comercio, Duque de Caxias (Brazil)

The kinetics and thermodynamics of liquid-phase etherification of isoamylenes with methanol on ion exchange catalyst (Amberlyst 15) were studied. Thermodynamic properties and rate data were obtained in a batch reactor operating under 1,013 kPa and 323--353 K. The kinetic equation was modeled following the Langmuir-Hinshelwood-Hougen-Watson formalism according to a proposed surface mechanism where the rate-controlling step is the surface reaction. According to the experimental results, methanol adsorbs very strongly on the active sites, covering them completely, and thus the reaction follows an apparent first-order behavior. The isoamylenes, according to the proposed mechanism, adsorb simultaneously on the same single active center already occupied by methanol, migrating through the liquid layer formed by the alcohol around the catalyst to react in the acidic site. From the proposed mechanism a model was suggested and the kinetic and thermodynamic parameters were obtained using nonlinear estimation methods.

• OSTI ID: 6775664
• Journal Information: Industrial and Engineering Chemistry Research; (United States), Journal Name: Industrial and Engineering Chemistry Research; (United States) Vol. 34:2; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

10 SYNTHETIC FUELS
100200* -- Synthetic Fuels-- Production-- (1990-)
ADDITIVES
ALCOHOLS
ALKENES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
EQUATIONS
ETHERS
FUEL ADDITIVES
FUELS
GASOLINE
HYDROCARBONS
HYDROXY COMPOUNDS
KINETIC EQUATIONS
KINETICS
LIQUID FUELS
MATHEMATICAL MODELS
METHANOL
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PETROLEUM PRODUCTS
REACTION KINETICS
SYNTHESIS