Prarancangan Pabrik Asam Akrilat dari Propilena dan Udara dengan Kapasitas 240.000 Ton per Tahun
Al Athea Firmano Nasihuddin, Prof. Dr. Ir. Edia Rahayuningsih, M.S., IPU.
2026 | Skripsi | TEKNIK KIMIA
Acrylic acid is an unsaturated carboxylic acid derivative widely used as a monomer raw material in the acrylic polymer industry, superabsorbent polymers (SAP), paints, adhesives, and textiles. Acrylic acid is produced through a two-stage oxidation reaction: the first stage involves the oxidation of propylene using oxygen from air to form acrolein, followed by a second stage in which acrolein is further oxidized to produce acrylic acid. Propylene reacts in the gas phase in Reactor-1 (R-201), a fixed-bed multitube reactor operating at a pressure of 3 atm and a temperature range of 250–408°C, using Bismuth Molybdate (Alfa-Bi2Mo3O12) as the catalyst, achieving a propylene conversion of 95%. The reaction gas is then fed into Reactor-2 (R-202), also a fixed-bed multitube reactor, for the oxidation of acrolein to acrylic acid at a pressure of 1.8 atm and a temperature range of 250–263.6°C, using Vanadium Molybdenum Oxide (VMo3O11) as the catalyst, with an acrolein conversion of 95.5%.
This Acrylic Acid Plant will be constructed in the Cilegon industrial area, Banten, covering a land area of 65,822 m² and employing 270 workers. The plant is designed with a production capacity of 240,000 tons/year (330 days, 24 hours). The required raw materials include propylene at 257,400 tons/year sourced from PT Chandra Asri Petrochemical, along with air as the oxygen source for the oxidation process. The plant requires water to support the production process at 152,525.44 kg/h, electricity at 15,64 MW, and air at 356,064.61 kg/h.
The fixed capital investment required for this plant is $246,347,435, equivalent to IDR 4,396,260,552,254, using an exchange rate of IDR 17,841.76 per USD (June 2026). with a Working Capital of $93,641,973.48. With a profit after tax of $41,582,960.12 per year, the plant yields a Return on Investment (ROI) of 19.69% before tax and 15.36% after tax, a Payout Time (POT) of 3.14 years before tax and 3.69 years after tax, a Breakeven Point (BEP) of 49.73%, a Shutdown Point (SDP) of 21.64%, and a Discounted Cash Flow Rate of Return (DCFRR) of 20.95%. Therefore, the Acrylic Acid Plant from propylene and air with a capacity of 240,000 tons/year is feasible and attractive for further consideration.
Kata Kunci : Akrolein, Asam Akrilat, Oksidasi, Propilena