Laporan Magang Periode Juli-Agustus 2025 PT Kilang Pertamina Internasional Refinery Unit IV Cilacap

Khanza, Nabila Irba (2025) Laporan Magang Periode Juli-Agustus 2025 PT Kilang Pertamina Internasional Refinery Unit IV Cilacap. Project Report. [s.n.]. (Unpublished)

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Abstract

Sulfur Recovery Unit (SRU) di PT Kilang Pertamina Internasional Refinery Unit IV Cilacap memiliki peran penting dalam mengurangi emisi hidrogen sulfida (H₂S) melalui proses penyerapan menggunakan larutan Methyldiethanolamine (MDEA) pada Unit Gas Treating. Kinerja proses absorpsi sangat dipengaruhi oleh konsentrasi MDEA (amine strength), sehingga diperlukan evaluasi untuk memperoleh kondisi operasi yang optimal. Penelitian ini bertujuan menganalisis pengaruh variasi amine strength terhadap efisiensi penyerapan H₂S pada LP Contactor menggunakan simulasi Aspen HYSYS. Data operasi aktual berupa komposisi sour gas, kondisi operasi, dan komposisi lean amine digunakan sebagai dasar pembangunan model simulasi dengan property package Acid Gas–Chemical Solvent. Analisis sensitivitas dilakukan dengan memvariasikan fraksi massa MDEA pada rentang 33–49% berat dan mengevaluasi kadar H₂S pada sweet gas serta H₂S loading pada rich amine. Hasil simulasi menunjukkan bahwa peningkatan konsentrasi MDEA menurunkan kadar H₂S pada sweet gas secara signifikan, dari 5,77 menjadi 0,59, sehingga efisiensi penyerapan meningkat. Sebaliknya, H₂S loading pada rich amine menurun dari 0,261 menjadi 0,176 mol H₂S/mol MDEA yang mengindikasikan meningkatnya kebutuhan energi regenerasi. Pada konsentrasi 40% berat MDEA diperoleh efisiensi penyisihan H₂S mendekati 100% dengan nilai H₂S loading sebesar 0,217 mol H₂S/mol MDEA. Konsentrasi tersebut memberikan keseimbangan terbaik antara pencapaian spesifikasi sweet gas dan efisiensi operasional, sehingga direkomendasikan sebagai kondisi operasi optimum pada LP Contactor Unit Gas Treating.
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The Sulfur Recovery Unit (SRU) at PT Kilang Pertamina Internasional Refinery Unit IV Cilacap plays an essential role in reducing hydrogen sulfide (H₂S) emissions through an absorption process using Methyldiethanolamine (MDEA) solution in the Gas Treating Unit. The absorption performance is highly influenced by the MDEA concentration (amine strength), making optimization necessary to achieve efficient operation. This study aimed to evaluate the effect of amine strength on H₂S absorption performance in the LP Contactor using Aspen HYSYS simulation. Actual operating data, including sour gas composition, operating conditions, and lean amine composition, were used to develop the simulation model with the Acid Gas–Chemical Solvent property package. Sensitivity analysis was performed by varying the MDEA mass fraction from 33 to 49 wt% while evaluating H₂S concentration in the sweet gas and H₂S loading in the rich amine. The simulation results showed that increasing the MDEA concentration significantly reduced the H₂S concentration in the sweet gas from 5.77 to 0.59, indicating improved absorption efficiency. However, the H₂S loading in the rich amine decreased from 0.261 to 0.176 mol H₂S/mol MDEA, implying higher regeneration energy requirements. At an MDEA concentration of 40 wt%, the H₂S removal efficiency approached 100%, with an H₂S loading of 0.217 mol H₂S/mol MDEA. This concentration provides the best balance between achieving the required sweet gas specification and maintaining operational efficiency, making it the recommended optimum operating condition for the LP Contactor in the Gas Treating Unit.

Item Type:	Monograph (Project Report)
Uncontrolled Keywords:	Sulfur Recovery Unit, MDEA, amine strength, H₂S, Aspen HYSYS, LP Contactor.
Subjects:	T Technology > TP Chemical technology > TP155.7 Chemical processes.
Divisions:	Faculty of Vocational > 24305-Industrial Chemical Engineering
Depositing User:	Nabila Irba Khanza
Date Deposited:	31 Jul 2026 02:57
Last Modified:	31 Jul 2026 02:57
URI:	http://repository.its.ac.id/id/eprint/141773

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