Kinetic Study of Carbonylation of Methanol Using Homogenous Iridium Catalyst

Hosseinpour, Vahid | 2010

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 41171 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Kazemeini, Mohammad; Mhammad Rezaee, Alireza
  7. Abstract:
  8. Homogenous carbonylation of methanol is a major way to acetic acid. In this study central composite design (CCD) at five level (-1.63, -1, 0, +1, +1.63) combined with response surface methodology (RSM) have been applied to optimize carbonylation of methanol using ruthenium promoted iridium catalyst in homogenous phase. The effect of seven process variables including; temperature, pressure, iridium, ruthenium, methyl iodide, methyl acetate and water concentrations as well as, their interactions were modeled. The determined R2 values greater than 0.9 for the rate, methane, carbon dioxide and hydrogen formation data, confirmed quadratic equation properly fitted obtained experimental data. The optimum conditions for maximum rate and minimum methane formation were obtained via the RSM to be: temperature of 191℃, pressure of 33.29 barg, iridium concentration of 788.91 ppm, ruthenium concentration of 2093.81 ppm, methyl iodide concentration of 11 wt.%, methyl acetate concentration of 23.16 wt.% and water content of 8.57 wt.%. Results predicted by the model at optimum determined conditions, 29.61 mole/(l.h) for reaction rate and 4.83, 2.1, 1,28 % moler for methane, carbon dioxide and hudrogen respectively, were reasonably compared with experimental data obtained for the reaction rate and methane formation; 28 mole/(l.h) and 3.9, 2.8, 2.1 mole% methane, carbon dioxide and hudrogen respectively; respectively
  9. Keywords:
  10. Acetic Acid ; Optimization ; Ruthenium ; Central Composite Design ; Response Surface Methodology ; Methanol Carbonylation ; Iridium

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