Laporan Magang Mandiri di PT. Pertamina EP Field Cepu Zona 11

Syahrani, Aulia Rahma (2026) Laporan Magang Mandiri di PT. Pertamina EP Field Cepu Zona 11. Project Report. [s.n.]. (Unpublished)

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Abstract

Troubleshooting ini dilakukan pada unit dehidrasi gas alam di CPP Gundih, PT Pertamina EP Field Cepu, yang menggunakan triethylene glycol (TEG) untuk menurunkan kandungan air pada gas alam. Berdasarkan data operasi aktual, gas kering yang dihasilkan telah memenuhi spesifikasi sales gas, namun beban panas reboiler pada proses regenerasi TEG masih relatif tinggi, yaitu sebesar 2,154 × 10^6 kJ/jam. Kondisi tersebut menunjukkan bahwa konsumsi energi pada tahap regenerasi masih berpotensi untuk dioptimalkan. Penelitian ini bertujuan untuk mengevaluasi pengaruh tekanan flash separator terhadap beban panas reboiler serta menentukan kondisi operasi yang lebih efisien. Metode yang digunakan adalah simulasi proses menggunakan Aspen HYSYS dengan membandingkan kondisi aktual, pendekatan penurunan tekanan berbasis efek Joule–Thomson, dan variasi tekanan flash separator. Hasil simulasi menunjukkan bahwa pendekatan Joule–Thomson kurang efektif karena hanya memberikan penurunan temperatur yang kecil dan menyebabkan pressure drop yang cukup besar. Sementara itu, penurunan tekanan flash separator dari 1.584 kPa menjadi 1.484 kPa mampu menurunkan beban panas reboiler menjadi 1,633 × 10^6 kJ/jam atau sekitar 24% dibandingkan kondisi aktual, dengan kualitas gas kering tetap memenuhi spesifikasi. Dengan demikian, optimasi tekanan flash separator dapat menjadi alternatif yang efektif untuk meningkatkan efisiensi energi pada unit regenerasi TEG.
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This troubleshoot was conducted on the natural gas dehydration unit at CPP Gundih, PT Pertamina EP Field Cepu, which uses triethylene glycol (TEG) to reduce water content in natural gas. Based on actual operating data, the produced dry gas has met the sales gas specification; however, the reboiler heat duty in the TEG regeneration process was still relatively high at 2.154 × 10^6 kJ/h. This condition indicates that energy consumption in the regeneration stage still has potential for optimization. This study aims to evaluate the effect of flash separator pressure on reboiler heat duty and to determine a more efficient operating condition. The method used was process simulation using Aspen HYSYS by comparing the actual condition, the pressure reduction approach based on the Joule–Thomson effect, and flash separator pressure variations. The simulation results showed that the Joule–Thomson approach was less effective because it only provided a small temperature decrease and caused a significant pressure drop. Meanwhile, reducing the flash separator pressure from 1,584 kPa to 1,484 kPa decreased the reboiler heat duty to 1.633 × 10^6 kJ/h, or about 24% lower than the actual condition, while the dry gas quality still met the specification. Therefore, optimizing the flash separator pressure can be considered an effective alternative to improve energy efficiency in the TEG regeneration unit.

Item Type:	Monograph (Project Report)
Uncontrolled Keywords:	dehidrasi gas alam, triethylene glycol, flash separator, regenerasi TEG, beban panas reboiler, Aspen HYSYS, natural gas dehydration, triethylene glycol, flash separator, TEG regeneration, reboiler heat duty, Aspen HYSYS
Subjects:	Q Science > QD Chemistry > QD117 Absorption Q Science > QD Chemistry > QD471 Chemical compounds - Structure and formulas Q Science > QD Chemistry > QD502 Chemical kinetics Q Science > QD Chemistry > QD63.S4 Separation (Technology)
Divisions:	Faculty of Vocational > 24305-Industrial Chemical Engineering
Depositing User:	Aulia Rahma Syahrani
Date Deposited:	23 Jul 2026 07:59
Last Modified:	23 Jul 2026 07:59
URI:	http://repository.its.ac.id/id/eprint/136598

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