SYNTHESIS OF PT/ZSM-48 CATALYST TO ISOMERIZE N-DODECANE

• Main Author: RUSTYAWAN NIM : 23015038, WAWAN
• Format: Theses
• Language: Indonesia
• Subjects: Teknik kimia
• Online Access: https://digilib.itb.ac.id/gdl/view/31563
• Institution: Institut Teknologi Bandung

<p align="justify">Normal parafin (n-parafin) produced from palm kernel oil (PKO) has a high value of freezing <br /> <br /> point and and can’t be aplicated to be bio jet fuel (BJF). N-parafin from BJF should be improve <br /> <br /> the quality to be i-parafin which has a good freezing point by using isomerization. This process <br /> <br /> needed catalysts which have bifungtional system, there are balancing acid side and active metal. ZSM-48 <br /> <br /> choosed to be the acid support dan the active metal is platinum (Pt) and the promotor is Palladium (Pd). <br /> <br /> The catalyst designed to produce acid level which suitable for isomerization and minimize the cracking <br /> <br /> reaction. <br /> <br /> This research has succeeded to produce ZSM-48 with reproducible by using hydrothermal and shyntesis <br /> <br /> Pt-Pd/HZSM-48 catalyst by using wet impregnation. These catalyst tested to isimerize n-dodekana in <br /> <br /> continues fixed bed reactor at 225-270 C temperature, preesure opreration in 35 bar, H2/HC 1058 Nml/ml <br /> <br /> and LHSV 1/hr. n-dodecane has characteristic similar to palm kernel oil which treated to be branched <br /> <br /> hydrocarbon with the better freezing point and pour point. <br /> <br /> Chemical Reaction Engineering and Catalysis Laboratory ITB has been generate sulfided NiMo/?- <br /> <br /> Al2O3 (NiMoS) catalyst that has a good activity and selectivity for hydrodeoxygenation palm kernel <br /> <br /> oil in certain condition & giving performance 100% convertion of PKO to be bio diesel (C15-C18) with <br /> <br /> the pour point is 18oC, this catalyst called HBD-2. Therefore, development of isomerization catalyst not <br /> <br /> carried out. During this research will learns type of template to produce the zeolite by variate mol ratio of <br /> <br /> SiO2/Al2O3; OH-/SiO2; H2O/SiO2. This research, give the results: at SiO2/Al2O3 ratio below 100, the <br /> <br /> zolite crystal so weak, at OH-/SiO2 ratio more than 0.136 the alfa silica being appear and the H2O/SiO2 <br /> <br /> ratio below 26.67 the crystalinity is low. The catalyst support extruded by mixed the 25%-wt part of <br /> <br /> ZSM-48 and 75%-wt part of gamma alumina. Metal active in this catalyst impregnated by 0.3 %-wt Pt <br /> <br /> dan 0.2 %-wt Pd. calcined at 525 0C for 4 hours. There are 2 type catalyst iZ-B dan iZ-C that would be <br /> <br /> tested, iZ-B has 0.24%wt chloride content and iZ-C has 70 ppm. Performance test operated at 225-340 <br /> <br /> C, LHSV 1/hr; pressure 30 bar,and the model using n-dodecane. iZ-B catalyst shown low isomerization <br /> <br /> and high alkylation. iZ-C catalyst give results 52.9% conversion and 31.86% selectivity.<p align="justify"> <br /> <br /> <br /> <br />