Kinetics of the hydrogenation of diethyl oxalate to ethylene glycol

Journal Article · Sat Jul 01 04:00:00 EDT 1995 · Industrial and Engineering Chemistry Research

DOI:https://doi.org/10.1021/ie00046a020· OSTI ID:178398

Xu, G H; Li, Y C; Li, Z H; Wang, H J ^[1]

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1. Tianjin Univ. (China). Dept. of Chemical Engineering

The reaction kinetics of the catalytic hydrogenation of diethyl oxalate to ethylene glycol in the vapor phase over a copper-base catalyst were studied. The experiments were carried out in a continuous flow microreactor. The experimental work was based on the following consecutive reaction scheme: C{sub 2}H{sub 5}COOCOOC{sub 2}H{sub 5} + 4H{sub 2} {leftrightarrow} HOCH{sub 2}CH{sub 2}OH + 2C{sub 2}H{sub 5}OH; HOCH{sub 2}CH{sub 2}OH + H{sub 2} {yields} C{sub 2}H{sub 5}OH + H{sub 2}O. Fourteen competing kinetic models obtained from the possible mechanisms have been proposed for the above scheme. By fitting the experimental data to each model, rate equations were found to best fit the data. In the model from the above rate equations were obtained the hydrogenation reaction of diethyl oxalate follows the Langmuir-Hinshelwood mechanism in which hydrogen adsorbs dissociatively. The surface reaction step was rate-limiting for both the main and side reaction.

• Sponsoring Organization: USDOE
• OSTI ID: 178398
• Journal Information: Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 7 Vol. 34; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

10 SYNTHETIC FUELS
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
COPPER COMPOUNDS
GLYCOLS
HYDROGENATION
KINETIC EQUATIONS
MATERIAL SUBSTITUTION
MATHEMATICAL MODELS
OXALATES
PETROLEUM PRODUCTS
SYNTHESIS