PREPARASI DAN KARAKTERISASI KATALIS Co DAN CoMo TEREMBAN PADA SILIKA MESOPORI UNTUK HIDRORENGKAH PELUMAS BEKAS; PREPARATION AND CHARACTERIZATION OF Co AND CoMo LOADED ON MESOPOROUS SILICA FOR HYDROCRACKING OF WASTE LUBRICANT

Masykuroh, Athiah, Iip Izul Falah

2016 | Disertasi | FMIPA

Preparation and characterization of Co and CoMo loaded on mesoporous silica as a catalyst using gelatin as a template have been investigated. The catalyst used for the hydrocracking of waste lubricant. Gelatin was extracted from bovine leg’s bone using CH3COOH, NaOH, HCl and distilled water at variation of hydrolysis temperature (50 ?C, 70 ?C and 90 ?C). The gelatins were characterized by FT-IR spectrophotometer and SDS-PAGE. The mesoporous silica (SM) sample was synthesized by hydrothermal method. The Co metal was loaded on to the SM sample by wet impregnation method (Co/SM) and the Co and Mo metals were loaded on to the SM sample by using sequential wet impregnation (CoMo/SM1) and codeposition wet impregnation (CoMo/SM2). The catalysts were characterized by FT-IR spectrophotometer, BET, SSA, SEM-EDX and TEM. The hydrocracking process of waste lubricant was conducted using a stainless steel reactor of semi-batch system at ratio of feed/catalyst of 20 and temperature of 450 ?C with 10 mL/min hydrogen flow rate. Liquid product of the process was weighed then analyzed with GC-MS. Quantitatively and qualitatively the gelatin extracted at 90?C showed the best result. Mesoporous silica was succesfully synthesized with pore diameter of 4.308 nm and wormhole-like pore shape. The Co/SM catalyst sample has the highest metal containing (0.86%) then CoMo/SM1 (0.84%) and CoMo/SM2 (0.64%). Metal loaded on mesoporous silica increased the acidity, increased pore diameter except for CoMo/SM1 sample and not decreased total pore volume significantly for all sample. The Co/SM catalyst sample has the highest activity to produce liquid product (49.90%) followed by CoMo/SM2 (44.61%), SM (21.07%), CoMo/SM1 (14.93%) and without catalyst (6.63%). Co/SM has the highest selectivity to produce gasoline fraction (34.13%) followed by CoMo/SM2 (24.16%), CoMo/SM1 (11.76%), SM (11.68%) and without catalyst (4.43%).

Kata Kunci : gelatin, mesoporous silica, Co, CoMo, hydrocracking