CD Skripsi
Rancangan Pabrik Akrolein Dengan Glycerol Dehydration Process Dengan Desain Alat Utama Kolom Distilasi Akrolein (T-108)
ABSTRACT
The increasing demand for basic chemicals has prompted Indonesia to produce its own chemicals, which until now have been imported. One example is acrolein, which according to data from the Central Statistics Agency (2023), Indonesia still imports around 2,098,592 kg/year. Acrolein is the simplest unsaturated aldehyde (C₃H₄O) that plays an important role as a raw material for various chemical products. To reduce import dependency, it is necessary to develop the domestic acrolein industry by utilizing glycerol, a major by-product of the biofuel and oleochemical industries, as an alternative raw material. Acrolein products have a broad domestic and international market, mainly used in the manufacture of acrylic acid, herbicides, fungicides, methionine, and glutaraldehyde. The city of Dumai, Riau Province, is a strategic location for the establishment of a factory because it has many supporting biodiesel industries, is close to the domestic market, and is located on an international trade route that facilitates access to global markets.
The technology used for acrolein production is the glycerol dehydration process with 66.132 ton/yr production capacity. The glycerol dehydration process employs a fixed-bed multitube reactor operating at 340°C under atmospheric pressure, achieving a glycerol conversion of 98.5%. The dehydration reaction produces by-products such as water, acetaldehyde, formaldehyde, and acetone. The main product, acrolein, is separated using the distillation column T-108, which operates at a pressure of 13 atm with 27 sieve trays. The total electricity requirement for the integrated acrolein plant is 23,621 kW, with the steam supply system designed using a cogeneration model. Environmental aspects are considered by treating the generated waste in accordance with the Regulation of the Minister of Environment No. 5 of 2014. Each process unit is equipped with control and instrumentation systems to minimize operational errors, optimize production, and ensure safety and occupational health.
The economic analysis of the plant indicates positive results. The obtained feasibility parameters are as follows: Net Present Value (NPV) of IDR 8,374,038,705,917; Internal Rate of Return (IRR) of 18.66%; Break-Even Point (BEP) of 30.59%; Return on Investment (ROI) of 20.80%; and Payback Period (PBP) of 3.41 years. The positive NPV and PBP of less than four years indicate a relatively short investment recovery period, while the IRR, which exceeds the average loan interest rate, confirms that the acrolein plant based on the glycerol dehydration process is economically feasible and potentially profitable to implement.
Keywords: Acrolein, Dehydration, Economic Analysis, Glycerol, Plant
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