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Cundari, Lia
Department Of Chemical Engineering, Faculty Of Engineering, Universitas Sriwijaya, Indonesia
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Optimasi Suhu Reboiler pada De-Butanizer Column untuk Meningkatkan Efisiensi Energi dan Menjaga Kualitas LPG Mixed Herani, Lingga Putri; Ripaldi, Alif; Cundari, Lia; Muhammad Ardian; Januari, Ristian
Jurnal Ilmiah Teknik Kimia Vol. 10 No. 1 (2026): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v10i1.54870

Abstract

The fractionation plant of PT Perta-Samtan Gas Sungai Gerong separates hydrocarbon components from Natural Gas Liquid (NGL) into Liquefied Petroleum Gas (LPG) products that comply with the specifications of SK Ditjen Migas No. 116.K/10/DJM/2020. One key unit in this process is the De-Butanizer Column, which separates butane from lighter fractions. This study analyzes the effect of reboiler temperature variation on the composition of the LPG mixed and on energy efficiency in the distillation system. The simulation was performed in Aspen HYSYS V.14 using the Peng–Robinson equation of state and was based on actual operating data from the plant’s Distributed Control System (DCS). The results show that decreasing the reboiler temperature increases the propane (C3) content while reducing butane (C4) in the LPG mixed, with some butane carried over to the bottom product due to a lower boil-up rate. The optimal condition was found at 279.1 °F: at this temperature the LPG mixed still met quality standards while heat-flow consumption decreased by 460,491.74 kJ/h, resulting in annual energy savings of approximately Rp 321,073,593.25. This analysis concludes that operating the reboiler at a lower temperature can enhance energy efficiency without compromising product quality, thereby offering significant economic benefits to the company.
Inovasi Pemanfaatan Limbah Kulit Bawang sebagai Pestisida Alami Cundari, Lia; Afrah, B. Dawami; Sumardi, Novia; Ilmiaty, R. Silvia; Hadiah, Fitri; Santoso, Budi; Azhari, M. Thohir; Shailendra, F. Habib; Rahmadian, M. Rafly
IKRA-ITH ABDIMAS Vol. 10 No. 1 (2026): IKRAITH-ABDIMAS Vol 10 No 1 Maret 2026
Publisher : Universitas Persada Indonesia YAI

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Abstract

Peningkatan produksi dan konsumsi bawang putih di Sumatera Selatan menghasilkan limbah kulit bawang yang signifikan, yang jika tidak dikelola dengan baik dapat menimbulkan pencemaran lingkungan. Limbah kulit bawang putih mengandung senyawa aktif seperti allicin, flavonoid, dan sulfur, yang memiliki potensi sebagai bahan biopestisida ramah lingkungan. Metode yang digunakan dalam penelitian ini melibatkan pengolahan limbah kulit bawang putih melalui fermentasi dengan air leri, gula merah, dan EM4 sebagai starter. Proses pembuatan dilakukan melalui penyaringan dan fermentasi selama tiga hari sebelum diaplikasikan ke tanaman. Sosialisasi dilakukan kepada masyarakat di Kecamatan Talang Keramat Raya, dimana pelatihan praktik pembuatan biopestisida juga disertakan. Hasil pengujian menunjukkan bahwa biopestisida ini efektif membunuh hama, dengan tingkat mortalitas 100% pada jangkrik dalam waktu 13 menit. Hasil kuisioner menunjukkan bahwa 100% peserta memahami manfaat limbah kulit bawang dan tertarik untuk menerapkannya di rumah. Biopestisida dari limbah kulit bawang putih ini merupakan alternatif pengendalian hama yang aman dan berkelanjutan, serta mampu menggantikan pestisida kimia. Kesimpulannya, program ini berhasil meningkatkan kesadaran masyarakat akan manfaat limbah kulit bawang dan memberikan solusi praktis untuk mengurangi limbah sekaligus menjaga lingkungan.
Evaluation of Lifetime and Sulfur adsorption on Zinc Oxide (ZnO) at Desulfurizer of Fertilizer Industry Rizki, Fadhilah; Ramadhanty, Rizky Vasya; Cundari, Lia; Anggraini, Dwi; Riduansyah, Muhammad
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 11, No 1 (2026): EDISI MARET 2026
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v11i1.7726

Abstract

Fertilizer Industry has an ammonia unit to produce ammonia as the main raw material for urea production. The sulfur removal process occurs in the desulfurizer in the feed treating section to minimize ammonia production failure due to the toxic nature of sulfur for the catalyst in the reforming section. When the adsorbent is saturated in one of the desulfurizers, the desulfurizer position will be swapped and replaced with a new ZnO adsorbent. Lifetime evaluation of the adsorbent as well as analysis of the adsorption characteristics of the 108-DB desulfurizer were conducted to determine the adsorption performance by the adsorbent. Zinc Oxide (ZnO) adsorbent as of August 23, 2022 desulfurizer is still suitable for use and it is necessary to replace the new ZnO adsorbent when the fertilizer industry is Turn Around schedule, it is carried out in July 2023 in accordance with the design lifetime data of 3-4 years. The sulfur adsorption process of PUSRI-IIB feed treating section by ZnO adsorbent in desulfurizer follows the second-order kinetics model with the adsorption rate constant (k) value obtained as -0.3339 (month-1). The adsorption isotherm that takes place follows the Langmuir isotherm model and belongs to the type of chemical adsorption (chemisorption) with the maximum adsorption capacity (qe) and Langmuir adsorption constant (KL) values of 0.0629 mg/g.hr and 3.283977 L/mg, respectively.
Co-Authors Achmad Naufal Al Ghifary Achmad Zaidan Ade Tiara Agung D. Aryansyah Agung Gunawan Agus Suranto Al-Faiz, Ahmad Haris Aldi Ramadhani Aldi Ramadhani Alfatih, Muhammad Ma'ruf Alisan, Cinthya Putri Alna Livia Fanneza Althaf Taufiqurrahman Alvina Suryadinata Alvina Suryadinata Amanda Nabila Hasya Amira Siti Ramadhani Andini, Handalia Putri Annafi, Muhammad Aristya Fahrizul Ariva, Helmi Asha Aisha Julian Asnari, Muhammad Asyeni Miftahul Jannah Azhari, M. Thohir Bazlina Dawami Afrah Bobby Redian D. Dionisius David Bahrin Dedek Oktari Dwi Anggraini Dwi Budi Santoso Dyos Santoso Eki Saputra Endang Supriyatna Eva Oktarinasari Fachry Abda El Rahman Fahmi Nurusman Faisal Akbar Adin Farid Hayu Kurniawan Fitri Hadiah Fitri, Rizza Fadillah Friskha Hanifah Sakinah Gayatri, Rianyza Guluh Fauziah Marintika Habil Majid Wirawan Hadi Samhudi Herani, Lingga Putri Illovine Hadassa Ilmiaty, R. Silvia Indahsari, Siti Rachmi Januari, Ristian Julian, Asha Aisha Kha-Rizma Yudia Zannah Larasati, Wulan Ayum Leily Nurul Komariah Leonardo R. Ginting Luthfiyah A. Sayyidah Miftahurrizka Afrah Muhammad A. Rizan Muhammad Alik Aziz Muhammad Ardian Muhammad Radhiy Sukandar Nanda Citra Arisma Ni'matul Hakiki Vebri Awan Novia Sumardi Nucke Aurelia Oktarinasari, Eva Omar Ibrahim Patrick Rudy Meizakh Perdana. Ts, Redho Putri Ramadhania Putri, Anisyah Kamila R. Rosalina Rahmadian, M. Rafly Rahmadian, Muhammad R Ramadhanty, Rizky Vasya Riady, M.I. Riduansyah, Muhammad Ripaldi, Alif Rizka Wulandari Putri Rizki, Fadhilah Rosalina Rosalina RR. Ella Evrita Hestiandari Selpiana, Selpiana Shailendra, F. Habib Sinta, Eis Candra Suci Dwijayanti Suhendra, Ahmad Adi Susila Arita Susmanto, Prahady Teddy Suryadinata Tubagus Riadz Tuti Indah Sari, Tuti Indah Tuty Emilia Agustina Untung Waluyo uthfiyah A. Sayyidah wahyuningsih, dwi retno Winandyo Mangkoto Wulan Ayum Larasati Yandriani Yandriani Zalman, Arjun