Document Type : Research Article
Authors
1
Department of Chemical Engineering, Omidiyeh Branch, Islamic Azad University, Omidiyeh, Iran
2
Department of Chemical Engineering , Omidiyeh Branch, Islamic Azad University , Omidiyeh , Iran
3
Department of Chemical Engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran
Abstract
In this research, catalysts with zeolite bases ZSM-48 and organic-metallic framework MOF-5 were used as catalytic bases in the process of oxidative dehydrogenation of propane to produce propylene. The experimental design of the central composition method was used to investigate the effect of different parameters in the oxidative dehydrogenation process of propane. For this purpose, loading of chromium in the range of 2-6% by weight, ratio of propane to carbon dioxid in the range of 1:1-3:1 and temperature in the range of 500 to 700 degrees Celsius, and loading ratio of chromium to vanadium in the range of 2:1 to 5 1: was used as the input variables of the central composition method. After conducting the reactor test and analyzing the results, the design of the experiment was done by Design expert software. Also, with the increase in temperature, the percentage of propane conversion and the percentage of efficiency increase and the percentage of selectivity of propylene decreases. By reducing the propane-to-oxygen ratio with the Cr-V@MOF-5 organometallic framework catalyst, the percentage of propane conversion and the percentage of efficiency decrease and the percentage of selectivity increases. The optimal conditions obtained for the performance of the organometallic framework catalyst, the amount of chromium loading in the catalyst construction, the reaction temperature, the ratio of propane to CO2, and the loading ratio of chromium to vanadium were determined as 4%, 500 degrees Celsius, 1:1, 3.5:1, respectively. Under these conditions, the area under the propylene peak is estimated to be 93.3%. So that in optimal conditions Cr-V@ZSM-48, the amount of chromium loading in the catalyst construction, the reaction temperature, the propane to CO2 ratio, and the chromium to vanadium loading ratio were determined as 4%, 600°C, 3:1, and 3.5:1, respectively, and under these conditions, the area under propylene was obtained91. 1% is achievable.
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