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Dehydration kinetics for coal‐based isobutanol on γ ‐Al 2 O 3
Author(s) -
Mi Rongli,
Li Yingming,
Tian Xueyu,
Peng Hailing,
Yang Bolun
Publication year - 2017
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.22890
Subject(s) - isobutanol , chemistry , kinetics , selectivity , catalysis , dehydration , adsorption , thermodynamics , inorganic chemistry , chromatography , organic chemistry , alcohol , biochemistry , physics , quantum mechanics
Isobutanol dehydration using γ‐Al 2 O 3 catalysts to produce isobutene was carried out by a fixed bed reactor at 0.1 MPa. The effects of temperature, weight hourly space velocity, and particle size of catalyst on the conversion of isobutanol and selectivity of isobutene were investigated to find the optimum reaction conditions and get the kinetics information. The experimental results indicated that higher temperature could improve the conversion of isobutanol while a peak of selectivity of isobutene can be monitored with the temperature increasing. Meanwhile, increasing the flow rate leads to a decrease in the conversion of isobutanol, but showed little effect on selectivity of isobutene. The intrinsic kinetics model of isobutanol dehydration over γ‐Al 2 O 3 was developed according to the experimental results. The adsorption of isobutanol was considered as a rate‐determining step from the analysis results of reaction mechanism, and kinetics parameters were obtained by Levenberg‐Marquardt algorithm. The calculated results agreed well with the experimental data.