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All Journal Gema Wiralodra Jurnal Profesi Insinyur Universitas Lampung
Nurkhopipah, Siti
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Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Environmental Science Industrial & Manufacturing Engineering Other

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Analysis of Furnace Performance Efficiency 201-H-001 Prefractionation Unit PT Trans-Pacific Petrochemical Indotama Tuban-East Java Nurkhopipah, Siti; Hapsari, Farlina; Asminah, Ninin
Gema Wiralodra Vol. 15 No. 2 (2024): Gema Wiralodra
Publisher : Universitas Wiralodra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31943/gw.v15i2.698

Abstract

Petroleum processing generally begins with a heating process, so equipment is needed to heat the crude oil before entering the fractionation column. This heating is closely related to the separation of fractions based on differences in boiling points. Heating at a fairly high temperature is used by a furnace, where the heat source comes from gas fuel. Based on the discussion above, furnace efficiency is fascinating to calculate as an indication of whether or not the furnace is operational. This efficiency calculation is also a reference for PT. Trans-Pacific Petrochemical Indotama to shut down and repair equipment, especially furnaces. This research aims to understand the furnace's working principles, determine the parameters that influence furnace performance, and calculate the efficiency of Furnace 201-H-001 in the Prefractionation unit. The results obtained in this research are that there are variables used to calculate thermal furnace efficiency. These variables are air temperature, fuel gas temperature, fuel gas flow, flue gas temperature, theoretical air requirements, and excess air in terms of efficiency and combustion reactions. The results of the furnace efficiency calculations were 78.03%, 77.34%, and 77.75% respectively. The minimum thermal efficiency value ranges from 75 - 80%, so it can be said that the furnace in this research is still suitable for use.
Efektivitas Economizer Pada Boiler Z-1101 A di PT X Indramayu Asminah, Ninin; Nurkhopipah, Siti; Nurya, Nurya
Jurnal Profesi Insinyur Universitas Lampung Vol. 5 No. 2 (2024)
Publisher : Fakultas Teknik Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jpi.v5n2.130

Abstract

Economizer adalah perangkat yang berpotensi menjadi sumber energi alternatif yang dapat dimanfaatkan secara berkelanjutan. Dengan memanfaatkan panas buang, economizer mampu menghasilkan energi listrik dan uap dengan kebutuhan bahan bakar 10% - 30% lebih rendah dibandingkan pembangkit energi konvensional. Salah satu tantangan utama dalam proses produksi pembuatan polypropylene pada PT X ini adalah pemanfaatan panas gas buang pada cerobong yang dihasilkan dari boiler masih tinggi dengan temperatur 200°C - 400 °C. Penelitian ini bertujuan untuk menganalisis efektivitas economizer pada boiler Z-1101A yang memanfaatkan panas gas buang untuk memanaskan air umpan, meningkatkan efisiensi thermal, dan mengurangi konsumsi bahan bakar. Data dikumpulkan melalui observasi langsung dan sistem DCS selama periode bulan Maret 2024. Hasil menunjukkan rata-rata efektivitas economizer sebesar 81,59%, dengan nilai tertinggi mencapai 85,00% pada data ke III. Berdasarkan hasil penelitian ini menunjukkan bahwa hubungan efektivitas economizer dengan temperature berbanding lurus. Hal ini menunjukan bahwa economizer berfungsi optimal dalam memanfaatkan energi sisa, dengan rekomendasi pemeliharaan rutin seperti pembersihan dan pemeriksaan untuk memastikan kinerja maksimal. Begitupun dengan hubungan antara efektivitas economizer dengan laju perpindahan panas yang relative stabil. Temuan ini mendukung efisiensi energi dan keberlanjutan dalam industri migas.
Removal of lithium, sodium, and phosphate from the Li-ion battery cathode recycling process using column adsorption Nurkhopipah, Siti
Gema Wiralodra Vol. 14 No. 3 (2023): Gema Wiralodra
Publisher : Universitas Wiralodra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31943/gw.v14i3.552

Abstract

Lithium Ion Battery (LIB) is one type of battery whose demand is increasing every year. After the Li-ion battery usage cycle ends, more and more waste is generated. Wastewater from the LFP battery cathode recycling process still contains metals such as lithium, sodium, and phosphate. This experiment was carried out using the adsorption method. The adsorption method is used to remove metal ions in LFP battery waste. The adsorption process took place in a semi-continuous fixed-bed column made of glass cylinders with a height of 50 cm and a diameter of 2.5 cm. The artificial waste solution flowed into a column containing 135 g of activated carbon with variations in flow rates of 10, 15, and 20 mL/min for 2 hours. The concentration of the initial solution and the filtrate was analyzed using an Inductively Coupled Plasma-Optical Emission Spectrometer (ICP-OES). The experimental results showed that the maximum percentage removal of lithium, sodium, and phosphate at a flow rate of 10 mL/min was 95.22%, 96.42%, and 68.02%, respectively. In addition, the results of the adsorption kinetic studies reviewed using the Thomas and Yoon-Nelson models showed that the column adsorption performance for lithium, sodium, and phosphate was most effective at a flow rate of 10 mL/min with an adsorption capacity of 8.75.105 mg/g, 8.85.105 mg/g, and 3.91.105 mg/g, respectively. Meanwhile, the breakthrough times for lithium, sodium, and phosphate were 335 minutes, 441 minutes, and 126 minutes, respectively.
The Effect of Coke Yield on The Performance of Regenerator 15-R-103/104 in The Residue Catalytic Unit (RCU) at PT Kilang Pertamina International RU VI Balongan Nurkhopipah, Siti; Asminah, Ninin; Farhan, Farhan
Gema Wiralodra Vol. 16 No. 3 (2025): Gema Wiralodra
Publisher : Universitas Wiralodra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31943/gw.v16i3.854

Abstract

Regenerator 15-R-103/104 in the Residue Catalytic Unit (RCU) at PT Kilang Pertamina Internasional RU VI Balongan plays an important role in the Residue Catalytic Cracking (RCC) process by burning coke on the surface of the spent catalyst to restore catalyst activity and provide heat for the endothermic reaction. This study analyzes the effect of coke yield on regenerator performance using mass balance, heat balance, and thermal efficiency calculations based on Universal Petroleum Products (UOP) standards, with daily operational data for the period 1–28 January 2025. The results show that the total mass input of coke and combustion air is balanced with the flue gas output, indicating an efficient combustion process. The heat balance reveals a balanced energy distribution between heat carried by the flue gas, absorbed by the catalyst cooler, and lost due to radiation. The regenerator efficiency for each week was obtained at 57.98%, 58.07%, 56.13%, and 58.93%, with an average of 58%. The increase in coke yield was generally followed by an increase in the corrected heat of combustion, indicating a positive relationship between the amount of coke formed and the heat energy produced. These findings provide an important basis for optimizing regenerator performance in RCC systems.
Co-Authors Asminah, Ninin Farhan Farhan Hapsari, Farlina Nurya, Nurya