| dc.description.abstract | Liquid fuels, produced mainly by petroleum refining, play critical roles in the current energy supplies and support our society. According to data from the Special Task Force for Upstream Oil and Gas Business Activities (SKK Migas), in 2017, domestic fuel demand reached 1.3 million barrels per day. This condition contrasts with the crude oil production capacity of only 885 thousand barrels per day. This imbalance will lead to an increase in energy imports that can endanger national energy security. New renewable energy technology is needed to reduce dependence on fossil energy use. Alternative energy sources with great potential to be developed include coal, natural gas, and biomass. These three sources can be converted into synthesis gas (syngas), a mixture of CO and H2. Syngas can be converted into hydrocarbons equivalent to fossil fuels such as gasoline, kerosene, and diesel. Syngas conversion into hydrocarbon compounds is usually carried out through the Fischer-Tropsch synthesis (Avinashkumar, 2012). The liquid fuel plant with Fischer–Tropsch synthesis in this paper is planned to have a capacity of 25000 tons/year with the assumption that it operates for 330 days/year and 24 hours/day. In general, the stages of liquid fuel production through Fischer Tropsch synthesis are naphtha, distillate, and waxes with go through several stages, namely: 1) biomass gasification, namely sengon wood produces syngas (CO and H2), 2) purification of syngas from gasification, 3) Syngas reaction in the Fischer Tropsch reactor to form liquid fuel products, 4) separation of the main product from by-products and 5) Hydrocracking of liquid fuel and distillation of the resulting product. The supporting units in this production process are utility units that supply 283,583 kg/hour of water from the Elo River, Temanggung, and 69.27 kW of electricity from PLN Rayon Temanggung. This factory is planned to be established in the Temanggung area, East Java, considering the availability of raw materials, namely sengon wood, which is close to the location where the factory was established. The total area of this factory is around 36,000 m2 with a total number of 247 employees. Based on the calculations and economic evaluations that have been carried out, this factory requires a fixed capital of Rp. 578,235,232,043 and a total production cost of Rp. 3,028,225,991,667. The ROI value before tax is 68.77%, and the POT is 1.46 years with a high level of risk, with the BEP value of 25.2% with an SDP value of 20.83%. Through this economic analysis, the IRR value is 21.03%, with a MARR value of 3.25%. Based on the data obtained, the liquid fuel plant from sengon wood through the Fischer Tropsch synthesis process with a capacity of 25,000 tons/year is feasible from an economic point of view | en_US |
