LAPORAN MAGANG MANDIRI PT PETROKIMIA GRESIK

Rorong, Evan Dean Nathanael (2025) LAPORAN MAGANG MANDIRI PT PETROKIMIA GRESIK. Project Report. [s.n]. (Unpublished)

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Abstract

Proses kristalisasi aluminium fluorida trihidrat (AlF₃·3H₂O) di PT Petrokimia Gresik memiliki peran penting dalam menentukan yield produk dan efisiensi energi, namun kondisi operasi eksisting pada suhu 90–95°C menyebabkan pembentukan kristal belum optimal serta konsumsi steam yang tinggi. Oleh karena itu, dilakukan kajian troubleshooting untuk mengevaluasi pengaruh variasi suhu kristaliser dan seed ratio terhadap pembentukan kristal menggunakan pendekatan teoritis berdasarkan neraca massa, neraca energi, literatur, dan referensi paten. Hasil analisis menunjukkan bahwa kondisi operasi optimum diperoleh pada suhu 75°C dengan seed ratio sebesar 1,5 kali terhadap jumlah AlF₃ pada umpan dan waktu tinggal 4 jam, yang mampu meningkatkan yield sekitar 3%, menurunkan kebutuhan steam sebesar 56,38%, serta mengurangi biaya utilitas tahunan hingga sekitar 65,04% dibandingkan kondisi operasi lapangan. Rekomendasi tersebut diharapkan dapat meningkatkan efisiensi proses kristalisasi sekaligus menekan biaya operasional produksi aluminium fluorida.
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The crystallization process of aluminum fluoride trihydrate (AlF₃·3H₂O) at PT Petrokimia Gresik plays a crucial role in determining product yield and energy efficiency; however, the existing operating temperature of 90–95°C results in suboptimal crystal formation and high steam consumption. Therefore, a troubleshooting study was conducted to evaluate the effects of crystallizer temperature and seed ratio on crystal formation using theoretical approaches based on mass and energy balances, literature, and patent references. The analysis indicated that the optimum operating condition was achieved at 75°C with a seed ratio of 1.5 times the AlF₃ feed and a residence time of 4 hours, resulting in an approximately 3% increase in yield, a 56.38% reduction in steam consumption, and an annual utility cost reduction of approximately 65.04% compared with the current plant operation. These findings suggest that the proposed operating conditions can improve crystallization efficiency while reducing the operating cost of aluminum fluoride production.

Item Type:	Monograph (Project Report)
Uncontrolled Keywords:	AlF₃·3H₂O, AlF₃, crystallization, seed ratio, crystallizer temperature, energy efficiency, AlF₃·3H₂O, AlF₃, kristalisasi, rasio bibit, suhu kristaliser, efisiensi energi
Subjects:	T Technology > TP Chemical technology > TP156 Crystallization. Extraction (Chemistry). Fermentation. Distillation. Emulsions.
Divisions:	Faculty of Vocational > 24305-Industrial Chemical Engineering Technology
Depositing User:	Evan Dean Nathanael Rorong
Date Deposited:	29 Jul 2026 03:14
Last Modified:	29 Jul 2026 03:14
URI:	http://repository.its.ac.id/id/eprint/138454

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