Abstract
Renewable energy sources are prospective solutions for addressing future energy needs arising from the ever-increasing population and dwindling petroleum reserves. Biobutanol is one of the most efficient biofuels for use as a mixture with motor vehicle fuels. Biobutanol is produced from the acetone-butanol-ethanol (ABE) fermentation process and is separated into the pure components via multicomponent distillation. Mathematical modelling of the continuous multicomponent distillation of ABE was carried herein out using an equilibrium-based model with the modified Hang-Wanke method in MATLAB R2020a programming language and compared with the simulation results using Aspen Plus V9. The variables of this study were the feed stage, number of trays, reflux ratio to butanol purity, butanol recovery, and energy load of the reboiler and condenser. Based on the simulation results, the operating conditions in columns 1 and 2 were recommended based on the butanol purity, recovery, and reboiler load; the recommended operating conditions for column 1 are as follows—feed stage: 4, reflux ratio: 4, number of trays: 20 trays, with a column efficiency of 55.43%. The recommended operating conditions for column 2 are as follows—feed stage: 2, reflux ratio: 0.4, number of trays: up to 10, with a column efficiency of 54.94%.
Highlights
Indonesia has a high energy demand due to the large population
According to data from the Ministry of Energy and Mineral Resources (ESDM), the oil reserves in Indonesia in 2019 were only 3.2–3.3 billion barrels, and with the current production level of 803 thousand barrels per day, these reserves will only last for nine more years
Studies on butanol recovery via the simulation and modelling of ABE multicomponent continuous distillation on the sieve tray column have focused on the effect of the feed stage, reflux ratio, and operating pressure on the distillation column, among other factors
Summary
Indonesia has a high energy demand due to the large population. According to data from the National Development Planning Agency (Bappenas) in 2013, in 2019, Indonesia's population reached 267 million and is expected to increase every year.The increase in the energy demand is not proportional to the existing energy reserves. Indonesia has a high energy demand due to the large population. According to data from the National Development Planning Agency (Bappenas) in 2013, in 2019, Indonesia's population reached 267 million and is expected to increase every year. According to data from the Ministry of Energy and Mineral Resources (ESDM), the oil reserves in Indonesia in 2019 were only 3.2–3.3 billion barrels, and with the current production level of 803 thousand barrels per day, these reserves will only last for nine more years. Its properties are more similar to those of gasoline. This is because butanol has a longer carbon chain than ethanol, resulting in a higher volatilization rate, combustion rate, and octane value. Butanol can be mixed with gasoline at any percentage, which makes butanol far superior to ethanol (Karimi et al, 2015)
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