SYNTHESIS OF Pt/ZSM-48 CATALYST TO ISOMERIZE n-DODECANE

• Main Author: Rustyawan, Wawan
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/33533
• Institution: Institut Teknologi Bandung

ABSTRACT SYNTHESIS OF Pt/ZSM-48 CATALYST TO ISOMERIZE n-DODECANE By: Wawan Rustyawan NIM: 23015038 (Chemical Engineering Master Programme) Normal parafin (n-parafin) produced from palm kernel oil (PKO) has a high value of freezing point and and can’t be aplicated to be bio jet fuel (BJF). N-parafin from BJF should be improve the quality to be i-parafin which has a good freezing point by using isomerization. This process needed catalysts which have bifungtional system, there are balancing acid side and active metal. ZSM-48 choosed to be the acid support dan the active metal is platinum (Pt) and the promotor Palladium (Pd). The catalyst designed to produce acid level which suitable for isomerization and minimize the cracking reaction. This research has succeeded to produce ZSM-48 with reproducible by using hydrothermal and shyntesis Pt-Pd/HZSM-48 catalyst by using wet impregnation. These catalyst tested to isimerize n-dodekana in continues fixed bed reactor at 225-270 C temperature, preesure opreration in 35 bar, H2/HC 1058 Nml/ml and LHSV 1/hr. n-dodecane has characteristic similar to palm kernel oil which treated to be branched hydrocarbon with the better freezing point and pour point. Chemical Reaction Engineering and Catalysis Laboratory ITB has been generate sulfided NiMo/?-Al2O3 (NiMoS) catalyst that has a good activity and selectivity for hydrodeoxygenation palm kernel oil in certain condition & giving performance 100% convertion of PKO to be bio diesel (C15-C18) with the pour point is 18oC, this catalyst called HBD-2. Therefore, development of isomerization catalyst not carried out. During this research will learns type of template to produced the zeolite by variate mol ratio of SiO2/Al2O3; OH-/SiO2; H2O/SiO2. This research, give the results: at SiO2/Al2O3 ratio below 100, the zolite crystal so weak, at OH-/SiO2 ratio more than 0.136 the alfa silica appear and the H2O/SiO2 ratio below 26.67 the crystalinity weak. The catalyst support extruded by mixed the 25% part of ZSM-48 and 75% part of alumina. Metal active in this catalyst impregnated by 0.3 % wt Pt 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 tested, iZ-B has 0.24%wt chloride content and iZ-C has 70 ppm. Performance test operated at 225-340 C, LHSV 1/hr; pressure 30 bar, and the model using n-dodecane. iZ-B catalyst shown low isomerization and high alkylation. Katalis iZ-C give 52.9% conversion and 31.86% selectivity. Keyword : Isomerzationi, ratio of: SiO2/Al2O3; OH-/SiO2; H2O/SiO2, Pt/ZSM-48, n-dodecane