Free-radical kinetic model for homogeneous oxidation of methane to methanol

Journal Article · Sat May 01 04:00:00 EDT 1993 · Industrial and Engineering Chemistry Research; (United States)

DOI:https://doi.org/10.1021/ie00017a005· OSTI ID:6418242

Chun, Jinwoo; Anthony, R G ^[1]

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1. Texas A and M Univ., College Station (United States)

A free-radical reaction mechanism for homogeneous oxidation of methane to methanol was used to investigate the effect of oxygen concentration, residence time, and reaction temperature on the product distribution. The results from the simulation are compared with data for reactor feeds of 2.30-4.35% oxygen and 95.65-97.70% methane and pressure of 50 atm. Methanol selectivities decreased from 55% to 34% as the reaction temperature increased. Oxygen and methane conversions were 100% and approximately equal to the oxygen concentration in the feed, respectively. Helton's free-radical model with a change in the enhancement factors was used for the simulations. The enhancement factors were determined using several temperatures, oxygen conversions of 20-99%, and a residence time of 2 s. For 8- and 17-s residence times the model predicts the performance for the lowest temperature. A simulation is also presented, which suggests a method of operation to achieve methanol selectivities and yields of 70% and 7%, respectively.

• OSTI ID: 6418242
• Journal Information: Industrial and Engineering Chemistry Research; (United States), Journal Name: Industrial and Engineering Chemistry Research; (United States) Vol. 32:5; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
030300* -- Natural Gas-- Drilling
Production
& Processing
10 SYNTHETIC FUELS
100200 -- Synthetic Fuels-- Production-- (1990-)
ALCOHOLS
ALKANES
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHEMICAL REACTORS
COMPARATIVE EVALUATIONS
CONCENTRATION RATIO
ELEMENTS
EVALUATION
HYDROCARBONS
HYDROXY COMPOUNDS
KINETICS
MATHEMATICAL MODELS
METHANE
METHANOL
NONMETALS
OPTIMIZATION
ORGANIC COMPOUNDS
OXIDATION
OXYGEN
RADICALS
REACTION KINETICS
SYNTHESIS
TEMPERATURE DEPENDENCE
TIME DEPENDENCE
YIELDS