Skripsi
OPTIMASI DAN KARAKTERISASI PRODUK HYDROCRACKING PIROLISIS TANDAN KOSONG KELAPA SAWIT (TKKS) MENGGUNAKAN KATALIS BERBASIS SLUDGE OIL
Oil palm empty fruit bunches (EFB) are an abundant lignocellulosic waste in Indonesia with significant potential as a renewable energy source. However, the liquid product obtained from EFB pyrolysis still exhibits drawbacks, including high oxygen content and low stability, thus requiring further upgrading. One effective method to improve the quality of the liquid product is hydrocracking using a catalyst. This study aims to optimize the process conditions and characterize the hydrocracking products of EFB pyrolysis using a sludge oil–based catalyst, as well as to evaluate the characteristics and selectivity of the resulting products. The catalyst was synthesized through calcination, chemical activation using H₂SO₄, and carbonization. Hydrocracking was carried out at temperatures of 400, 450, and 500°C with catalyst loadings of 0.5 and 1 g. The analyzed parameters included liquid product density, coke weight, gas weight, liquid yield, and compound composition using GC-MS. The results showed that the optimum condition was achieved at 450°C with 1 g of catalyst, producing a liquid yield of 27.88%, density of 0.8349 g/mL, coke weight of 0.0220 g, and gas weight of 4.7973 g. GC-MS analysis revealed that the liquid product was still dominated by oxygenated compounds, particularly phenols (46.04%) and ketones (14.37%). However, an increase in the number of compounds with carbon chain lengths ≤C10 was observed after catalyst application. These findings indicate that the sludge oil–based catalyst has the potential to enhance product selectivity toward short-chain hydrocarbon fractions. Keywords : Oil palm empty fruit bunches, hydrocracking, catalyst, pyrolysis, sludge oil.
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