Hapsari, Tysna Mayang (2020) Desain Plantwide Control Pada Proses Produksi Octanol. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Kelangkaan gas alam di Jawa Timur menimbulkan permasalahan dalam ketersediaan bahan baku industri petrokimia.Kolom distilasi merupakan salah satu proses yang mengalami penurunan laju feed. Salah satu permasalahan pada pengoperasian kolom distilasi aldehid adalah konsumsi energi nya yang sangat besar, yaitu mencapai 40% - 50% dari total biaya operasinya. Hal tersebut menyebabkan biaya produksi yang besar, apalagi ditengah melambungnya harga LPG yang merupakan bahan bakar dari boiler. Akibat kelangkaan bahan baku berupa gas alam tersebut, kolom distilasi aldehid tidak dapat berproduksi sesuai kapasitas yang optimal, sehingga laju feed pada kolom distilasi aldehid berkurang yang pada akhirnya dapat menurunkan laju produksi.Untuk mengatasi permasalah tersebut dibutuhkan pengendalian proses plant yang kompleks. Perancangan desain plantwide control (PWC) pada proses produksi octanol telah berhasil menyelesaikan permasalahan tersebut, terbukti dengan adanya peningkatan produk, penghematan energi, serta respon yang stabil. Selain itu,metode PWC juga cocok diterapkan pada plant ini dikarenakan adanya material recycle dan integrasi panas. Penelitian menggabungkan metode PWC milik Luyben dan kogestad,menjadi tujuh langkah yaitu penentuan fungsi objektif, identifikasi DOF (Degree of Freedom), penentuan laju produksi, penentuan variabel ekonomi, penambahan pengendali feedforward,penambahan pengendali supervisory, dan optimisasi. Dengan menerapkan metode PWC, laju aliran produk dapat meningkat hingga sebesar 2,18 kg/h pada kenaikan feed 5%, dan dapat meningkat hingga sebesar 2,14 kg/h pada saat penurunan feed 5%. Peningkatan laju produksi dan penghematan energi mampu meningkatkan profit sebesar 12,35 U$/h dengan metode PWC dibandingkan strategi kontrol PID biasa. Dari segi Kestabilan respon, penerapan PWC juga dapat menghasilkan respon sistem yang stabil saat dilakukan uji gangguan dibuktikan dengan settling time dan overshoot yang menurun serta hilangnya eror steady state.
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The scarcity of natural gas in East Java raises problems in the availability of raw materials for the petrochemical industry.The distillation column is one of the processes that has decreased feed rate. One of the problems in operating an aldehyde distillation column is its enormous energy consumption, which reaches 40% -50% of the total operating costs. This causes huge production costs, especially amid the soaring price of LPG which is fuel from boilers. Due to the scarcity of raw material in the form of natural gas, the aldehyde distillation column cannot produce according to the optimal capacity, so that the feed rate in the aldehyde distillation column decreases which can ultimately reduce the rate of production. To overcome these problems, complex plant process control is needed. The design of plantwide control (PWC) design in the octanol production process has successfully resolved these problems, as evidenced by an increase in products, energy savings,and a stable response. In addition, the PWC method is also suitable to be applied in this plant because of the material recycle and heat integration. The study combines Luyben's PWC method and Skogestad, into seven steps, namely the determination of objective functions, identification of DOF (Degree of Freedom), determination of production rate, determination of economic variables, addition of feedforward controllers, addition of supervisory controllers, and optimization. By applying the PWC method, the product flow rate can increase up to 2.18 kg/h at a 5% increase in feed, and can increase up to 2.14 kg/h at a 5% decrease in feed. Increased production rates and energy savings can increase profit by 12.35 U $/h by the PWC method compared to the usual PID control strategy. In terms of the stability of the response, the application of PWC can also produce a stable system response when a disturbance test is proven by decreasing settling time and overshoot and steady state error loss.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RSF 629.89 Hap d-1 2020 |
| Uncontrolled Keywords: | Plantwide control, proses produksi octanol |
| Subjects: | T Technology > TP Chemical technology |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Physics Engineering > 30201-(S1) Undergraduate Thesis |
| Depositing User: | Tysna Mayang Hapsari |
| Date Deposited: | 07 Mar 2025 00:37 |
| Last Modified: | 07 Mar 2025 00:37 |
| URI: | http://repository.its.ac.id/id/eprint/74673 |
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