Abstract:
The formulation of Pt/HY catalyst which improves mechanical strength to avoid pressure drop in the reactor, by incorporating pseudo boehmite binder for the production of biojet fuel from hydrogen biodiesel was investigated. The formulation was performed by varying the pseudo boehmite composition (20, 40, 60, and 80 wt%) and type of acids in peptization (acetic acid and nitric acid). The mixture was extruded to a cylindrical form After the formulation, 0.1 wt% of platinum was loaded onto the extruded HY zeolite by ion-exchange In addition, the catalysts were characterized by several techniques including X-ray diffractometer (XRD), Brunauer-Emmett-Tellet (BET) method, temperature programmed reduction (TPR), and temperature programmed desorption (TPD) of isopropylamme. The results showed that the extruded HY zeolite added with pseudo boehmite certainly had a higher mechanical strength compared to the one without binder. It was found that the catalyst formulation modified the hydrogenation-to-acidity ratios, resulting in a higher selectivity towards hydrocarbon in gasoline range. All of the extruded catalysts gave high isomerized paraffins as a result of hydrocracking and hydroisomerization over Pt/HY catalysts. The use of nitric acid in pepitzation step resulted in a higher mechanical strength as compared to those obtained with acetic acid Among the formulated Pt/HY catalysts, the one with 60 wt% pseudo boehmite formulated Using nitric acid exhibited the highest yighest yield of jet fuel (30.29%). The optimum reaction condition to maximize the jet fuel was found at 310 ℃, 500 psig, LHSV of 2.5 h⁻¹, and H₂/feed ratio of 30.
