Investigation and optimization of the n-heptane isomerization reactionover the Pt-Zr-HMS catalysts with RSM method

Since the isomerization process plays an important role in various industries, increasing theefficiency of these processes is an inevitable necessity [۱]. In this research, using platinum catalyst,we tried to obtain the efficiency by changing the numerical value of temperature parameters,weight percentage of zirconium and hydrogen flow. The process of n-heptane isomerization onplatinum catalysts with the effect of different numerical values of the following parameters inresponse surface methodology (RSM) software; T: temperature (۲۰۰-۵۰۰ °C), WZ: weightpercentage of zirconium (۵ to ۳۵%), and TOS: time on hydrogen flow (۱-۶ h). As can be seen, theselectivity has a downward trend and then an upward trend. In this reaction, the minimumselectivity is between ۳۲۰ and ۴۴۰ °C, and the lowest value (۲۷.۳%) refers to ۳۵۰ °C. At atemperature of ۲۰۰ to ۲۶۰ °C, this reaction has the maximum selectivity, which is ۵۵.۳%, happenedat ۲۰۰ °C and TOS of ۳.۵ h. The highest selectivity is related to ۲۰۰ °C and ۳.۵ h, and the weightpercentage of zirconium is ۳۵% and ۵%, respectively.

Keywords:

Isomerization , Catalysts , Response surface methodology , Zirconium