Laporan Magang - Evaluasi Efektivitas Dehidrator pada Proses Sulfur Recovery Unit (SRU) di PT Kilang Pertamina Internasional Refinery Unit IV

Makarim, Ramzy Nabiel (2025) Laporan Magang - Evaluasi Efektivitas Dehidrator pada Proses Sulfur Recovery Unit (SRU) di PT Kilang Pertamina Internasional Refinery Unit IV. Project Report. [s.n]. (Unpublished)

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Abstract

Dehidrator merupakan peralatan penting pada unit LPG Recovery di PT Kilang Pertamina Internasional RU IV Cilacap yang berfungsi menghilangkan kandungan air dari aliran gas dengan prinsip adsorpsi menggunakan molekular sieve. Seiring waktu operasi, kapasitas molekular sieve menurun akibat kejenuhan sehingga memerlukan regenerasi, dan efisiensi regenerasi ini menentukan panjang cycle time. Permasalahan yang dihadapi adalah cycle time yang terlalu lama padahal feed gas aktual hanya sekitar 30% dari kapasitas desain, sehingga proses menjadi tidak efisien.Penelitian bertujuan mengevaluasi kinerja Dehidrator pada kondisi aktual dan menentukan strategi optimasi untuk menurunkan cycle time tanpa mengurangi kualitas pemurnian gas. Evaluasi dilakukan melalui perhitungan neraca massa dan energi regenerasi dengan bantuan simulasi Aspen HYSYS.Hasil menunjukkan waktu adsorpsi dapat dipersingkat menjadi 3,5 jam sehingga satu siklus menjadi 12 jam dari semula 18 jam. Penggunaan HP steam turun dari 1363 kg/hr menjadi 421,7756 kg/hr (bukaan valve 31%), sehingga menekan biaya operasi. Neraca energi menunjukkan regeneration gas mampu memenuhi kebutuhan penghilangan air dengan surplus 518.271,343 kJ. Kandungan hidrogen yang tinggi pada gas regenerasi meningkatkan konsumsi HP steam sehingga perlu dipantau.
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The dehydrator is a critical piece of equipment in the LPG Recovery unit at PT Kilang Pertamina Internasional RU IV Cilacap, functioning to remove water content from the gas stream through an adsorption process using molecular sieve. Over operating time, the molecular sieve capacity declines due to saturation and requires regeneration; the efficiency of this regeneration determines the length of the cycle time. The problem addressed is an excessively long cycle time even though the actual feed gas is only about 30% of the design capacity, making the process inefficient.
This study aims to evaluate the dehydrator's performance under actual field conditions and to determine an optimization strategy to reduce the cycle time without compromising gas purification quality. The evaluation was carried out through mass and regeneration-energy balance calculations supported by Aspen HYSYS simulation.
The results show that the adsorption time can be shortened to 3.5 hours, reducing one cycle to 12 hours from the original 18 hours. HP steam consumption dropped from 1363 kg/hr to 421.7756 kg/hr (valve opening at 31%), thereby lowering operating costs. The energy balance indicates the regeneration gas can meet the water-removal energy demand with a surplus of 518,271.343 kJ. A high hydrogen content in the regeneration gas increases HP steam consumption and should therefore be monitored.

Item Type:	Monograph (Project Report)
Uncontrolled Keywords:	dehydrator, Sulfur Recovery Unit, cycle time, regeneration, molecular sieve, Aspen HYSYS
Subjects:	T Technology > TP Chemical technology > TP155.7 Chemical processes.
Divisions:	Faculty of Vocational > 24305-Industrial Chemical Engineering
Depositing User:	Ramzy Nabiel Makarim
Date Deposited:	23 Jul 2026 03:55
Last Modified:	23 Jul 2026 03:55
URI:	http://repository.its.ac.id/id/eprint/136365

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