Skripsi
PREPARASI DAN KARAKTERISASI BIOCHAR TERSULFONASI HASIL KARBONISASI HIDROTERMAL TANDAN KOSONG KELAPA SAWIT DAN TEMPURUNG KELAPA
Prolonged accumulation of biomass waste can trigger anaerobic decomposition and greenhouse gas (GHG) emissions due to its difficult to decompose nature. One alternative utilization of biomass waste is by converting it into value-added products such as biochar through a thermochemical conversion process. This study aims to analyze the effect of temperature and time of hydrothermal carbonization on the quantity and characteristics of biochar produced from empty oil palm fruit bunches (OPEFB) and coconut shells (OPEFB). Biochar was obtained from a hydrothermal carbonization process with varying temperatures and times and then modified using the sulfonation method with concentrated sulfuric acid (H₂SO₄) to increase its acidic properties and catalytic activity. Characterization was carried out using XRD, FTIR, and sulfur elemental analysis. The results showed that increasing the temperature and time of carbonization can cause a decrease in yield but increase the amorphous nature and stability of the biochar structure, with yields ranging from 44.7–60.3% of dry weight. The success of the sulfonation process is indicated by the appearance of the –SO₃H group at wave numbers 1214–1031 cm⁻¹ for OPEFB biochar and 1212–1031 cm⁻¹ for TK biochar, as well as an increase in sulfur content to