Pra Rancangan Pabrik Pembuatan Vinil Asetat Monomer dari Asam Asetat, Etilena, dan Oksigen Melalui Proses Oksietilasi dengan Penambahan Proses Absorpsi/Stripping CO2 Kapasitas Produksi 32.500 Ton/Tahun

Abstract

The proposed preliminary design of vinyl acetate monomer (VAM) manufacturing plant from acetic acid, ethylene, and oxygen encompasses a production capacity of 32,500 tons/year with operational across 330 working days. The requisite raw materials for achieving the designated annual production volume include 3,968.899 kg/h of acetic acid, 5,562.261 kg/h of ethylene, and 888.221 kg/h of oxygen. The manufacturing process is stratified into three stages: raw materials preparation, catalytic reaction, and downstream purification. During the preparation phase, a gaseous mixture of ethylene, acetic acid, and oxygen is propelled through a compressor to elevate the pressure to 10 atm and conditioned at 150 °C prior to reactor feeding. The reaction stage occurs via an oxyethylation reaction within a multitube fixed bed reactor with maintained at 150 °C, 10 atm, and a precise residence time of 1.8 seconds. The catalytic system comprises 5,399.389 kg of palladium-gold catalysts in which systematically distributed across 115 reactor tubes. The purification stage implements an absorption process using K2CO3 47% solution to absorb carbon dioxide before being subsequently stored at 32 °C. The main product of VAM undergoes distillation at 1.6 atm and 108 °C and subsequently cooled to 40 °C. Furthermore, the refined VAM with a purity of 99.9% is stored in product storage tanks. The plant location is proposed strategically in Cilegon City, Banten Province, Indonesia. More specifically, the plant will occupy the G4 sector of Krakatau Industrial Estate I in PT Krakatau Industri Estate Cilegon (KIEC), with a planned land allocation of 27,760 m2. The enterprise’s organizational framework is proposed as a limited liability company (PT) with hierarchical line and staff administrative system. The workforce is projected at 195 personnel. The economic evaluation of the VAM manufacturing facility includes total capital investment approximately Rp2,216,742,808,044, total cost of Rp2,723,682,959,393, projected annual sales at Rp3,411,349,300,514, and profit after tax of Rp531,015,948,614, as well as key financial metrics of a profit margin (PM) of 15.566%, break even point (BEP) at 44.578%, return on investment (ROI) of 23.955%, return on network (RON) at 40.328%, pay out time (POT) of 4 years and 2 months, and an internal rate of return (IRR) of 23.189%. Therefore, the comprehensive analysis substantiates the feasibility of establishing this VAM manufacturing plant.