Pra Rancangan Pabrik Pembuatan Paraxilena dari Toluena dan Hidrogen Menggunakan Tatoray Process dengan Katalis ZSM-5 Kapasitas Produksi 200.000 Ton/Tahun

Abstract

The preliminary design of a para-xylene production plant from toluene and hydrogen has a production capacity of 200,000 tons per year and operates for 330 days annually. The raw materials required to achieve this production capacity are 150,793.710 kg/h of toluene and 9,893.075 kg/h of hydrogen. The overall process in this plant design consists of three main stages, namely feed preparation, reaction, and purification. In the feed preparation stage, the mixture of toluene and hydrogen gases is passed through a compressor to increase the pressure to 24 atm and then heated in a furnace to 425 °C before being fed into the reactor. In the reaction stage, the disproportionation reaction takes place inside a fixed-bed multitube reactor under conditions of 425 °C and 24 atm. The reaction employs ZSM-5 catalyst with a total mass of 18,705.574 kg, distributed collectively within 1,091 reactor tubes. In the purification stage, two distillation columns are used to separate toluene and benzene from the xylene mixture, followed by an adsorption process to obtain high purity para-xylene. The main product, para-xylene, is stored in a storage tank at 32 °C, while benzene and mixed xylene are stored at the same temperature as by products, and toluene is recycled back to the reactor feed. The plant is planned to be located in Cilegon City, Banten Province, Indonesia, specifically in Area G4, Krakatau Industrial Estate Cilegon (KIEC), with a total land area of 6.680 m². The company will operate as a Limited Liability Company (PT) using a line and staff organizational structure, employing 196 workers. The economic evaluation of the para-xylene production plant from toluene and hydrogen shows a total capital investment of Rp7.787.925.224.416, total production cost of Rp7.045.094.570.500, annual sales revenue of Rp8.810.798.334.147, and net profit after tax of Rp1.363.476.446.288. The economic feasibility analysis yields a profit margin (PM) of 15.48%, break-even point (BEP) of 48.08%, return on investment (ROI) of 17.51%, return on network (RON) of 35,02%, pay-out time (POT) of 5 years and 9 months, and an internal rate of return (IRR) of 16,658%. Therefore, the para-xylene production plant from toluene and hydrogen via disproportionation process is economically feasible to be established.