Izvorni znanstveni članak
Development of a New Kinetic Model for Methanol to Propylene Process on Mn/H-ZSM-5 Catalyst
N. Hadi
; Department of Chemical Engineering and Applied Chemistry, University of Tabriz, 5166616471, Iran
A. Niaei
; Department of Chemical Engineering and Applied Chemistry, University of Tabriz, 5166616471, Iran
S. R. Nabavi
; Department of Applied Chemistry, University of Mazandaran, Babolsar, Iran
A. Farzi
; Department of Chemical Engineering and Applied Chemistry, University of Tabriz, 5166616471, Iran
M. Navaei Shirazi
; Department of Chemical Engineering and Applied Chemistry, University of Tabriz, 5166616471, Iran
Sažetak
The activity of the H-ZSM-5 was modified by the addition of Ca, Mn, Cr, Fe, Ni, Ag, Ce and P. The highest selectivity of propylene was obtained over the Mn/H-ZSM-5 catalyst. The Mn modified catalyst was selected as the optimal catalyst and the kinetic study was carried out on it. All of the experiments were carried out in an isothermal fixed bed and plug flow reactor with the mixture of methanol and water. The temperature range was 400–550 °C and the weight hourly space velocities (WHSV) of methanol were: 2.51, 5.42, and 8.17 h–1. A reaction mechanism based on the theory of hydrocarbon pool and conjugate methylation/cracking mechanisms was proposed. The behavior of the reactor was mathematically modeled and the hybrid genetic algorithm was applied to estimate kinetic parameters. Good agreement was observed between the experimental and the calculated data. Effect of temperature on propylene selectivity was also investigated. It was found that the propylene selectivity steadily increases with temperature.
Ključne riječi
Kinetic modeling; methanol to propylene process; Mn/H-ZSM-5; hybrid genetic algorithm
Hrčak ID:
117986
URI
Datum izdavanja:
21.3.2014.
Posjeta: 2.910 *