Using Catalysts with ZSM-۴۸ Zeolite Support and MOF-۵ Organic-Metallic Framework in the Oxidative Dehydrogenation Process of Propane to Produce Propylene

In this research, catalysts with zeolite bases ZSM-۴۸ and organic-metallic framework MOF-۵ 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, the loading of chromium in the range of ۲-۶% by weight, the ratio of propane to carbon dioxide in the range of ۱:۱-۳:۱, and temperature in the range of ۵۰۰ to ۷۰۰ degrees Celsius, and the loading ratio of chromium to vanadium in the range of ۲:۱ to ۵ :۱ 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. However, with increasing chromium loading percentage, propane conversion percentage and oxidative dehydrogenation efficiency percentage first increase and then decrease, and selectivity percentage decreases. By reducing the propane-to-oxygen ratio with the Cr-V@MOF-۵ 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 CO۲, and the loading ratio of chromium to vanadium were determined as ۴%, ۵۰۰ degrees Celsius, ۱:۱, ۳.۵:۱, respectively. Under these conditions, the area under the propylene peak is estimated to be ۹۳.۳%. So that in optimal conditions, Cr-V@ZSM-۴۸, the amount of chromium loading in the catalyst construction, the reaction temperature, the propane to CO۲ ratio, and the chromium to vanadium loading ratio were determined as ۴%, ۶۰۰°C, ۳:۱, and ۳.۵:۱, respectively, and under these conditions, the area under propylene was obtained۹۱. ۱% is achievable.

کلیدواژه ها:

Catalyst Selectivity ، Zeolite ZSM-۴۸ ، MOF-۵ ، Propane Oxidative Dehydrogenation Process ، Experimental design