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All Journal Jurnal Rekayasa Proses Jurnal Teknik Kimia USU Journal of Engineering and Technological Sciences JURNAL INTEGRASI PROSES Jurnal Otomasi Kontrol dan Instrumentasi Chemistry Indonesian Journal of Chemical Research Jurnal Rekayasa Proses Jurnal Teknik Jurnal Muara Ilmu Ekonomi dan Bisnis ASEAN Journal of Chemical Engineering Jurnal Teknik Kimia Indonesia International Journal of Renewable Energy Development Jurnal Rekayasa Proses
Indarto, Antonius
Institut Teknologi Bandung
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences Other

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Pemodelan Proses dan Evaluasi Ekonomi Produksi Bio-Oil dari Limbah Tandan Kosong Kelapa Sawit Fanany, Muhammad Rifki; Septhian Marno; Tirto Prakoso; Aqsha Aqsha; Astri Nur Istyami; Meiti Pratiwi; Indarto, Antonius
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 22 No 2 (2023): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55893/jt.vol22no2.587

Abstract

Oil palm empty fruit bunches (OPEFB) are solid waste which is the residue from processing palm oil into crude palm oil (CPO). The high number of OPEFB produced requires proper handling to minimize the negative impact on the surrounding environment. One of the solutions to deal with this is to process OPEFB into bio-oil using fast pyrolysis technology. Before applying the process in the real world, it is necessary to do an economic evaluation first to find out whether the process can be economically profitable. This study aims to carry out an economic evaluation of the bio-oil production process made from OPEFB using fast pyrolysis technology. Aspen Plus was used in this study to carry out process modeling, while the economic evaluation was based on several literatures such as previous books and journals. Based on the results of the economic evaluation, the total capital cost (TCC) required to build this facility is USD 1,152,686 with an operating expenditure (OpEx) of USD 168,107. Then, from the economic indicators in the form of payback period (PBP) and internal rate of return (IRR), this facility takes 4 years to reach PBP with an IRR of 22%.
Dynamic Evaluation: Centrifugal Compressor’s Operation in Determining Anti-Surge Controller Tri Partono Adhi; Rosyid, Tanti S; Yusrin Ramli; Indarto, Antonius
Jurnal Otomasi Kontrol dan Instrumentasi Vol 14 No 2 (2022): Jurnal Otomasi Kontrol dan Instrumentasi
Publisher : Pusat Teknologi Instrumentasi dan Otomasi (PTIO) - Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/joki.2022.14.2.6

Abstract

Anti surging is developed for a compressor system consisting of a booster compressor and a high-pressure compressor in a serial circuit. This evaluation presented 6 options of anti-surge systems with variations of the number of Anti Surge Valve (ASV) and its combination with the addition of Hot Gas Bypass Valve (HGBV) and Cold Gas Bypass Valve (CGBV). From the model evaluation, the option that involves a special ASV (dedicated) for each compressor and coupled with a dedicated CGBV or HGBV is the best because the compressor can be back to normal in less than 1 second (maximum time to return to normal condition is 3 seconds. Referring to these options, dedicated ASV for each compressor provides more benefits to the security of compressor operation. However, the most appropriate option in the field will return to the issue of cost or ease of modification. For facilities that are running (brownfield), the use of tools which already exist in the field and do a little modification is the most appropriate option, while for the new facility (grassroots project), the single ASV for a compressor circuit is the most optimum as it only involves minimum equipment and configuration as simple as possible piping/instrumentation.
Simulasi Dinamik Pengoperasian Kompresor Sentrifugal Multitahap untuk Mengatasi Penurunan Tekanan Sumur Gas Pratiwi, Meiti; Dwi Savitri, Nike; Ramli, Yusrin; Sasongko, Dwiwahju; Indarto, Antonius
Jurnal Otomasi Kontrol dan Instrumentasi Vol 15 No 1 (2023): Jurnal Otomasi Kontrol dan Instrumentasi
Publisher : Pusat Teknologi Instrumentasi dan Otomasi (PTIO) - Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/joki.2023.15.1.4

Abstract

Currently, the utilization of natural gas as an energy source needs to be optimized due to its increasing demand. The utilization of natural gas to produce LNG requires a high-pressure operating system of 1000 psig. The installation of a multistage centrifugal compressor unit is essential to maintain the operating pressure when there is a decrease in the feed gas pressure from natural gas wells. This study aims to predict the performance of the compressor that would be used and optimize the compressor operating conditions to satisfy the specifications of the gas selling pressure. In this study, simulations were conducted on how to maintain the stability of the feed operating pressure in the case of a drop in the gas source pressure from 1000 psig to 200 psig over a period of 15 years. Herein, the gas flow rate under normal conditions is 80 MMSCFD with a gas flow rate variation under surge (minimum) and maximum conditions of 110% × normal flow rate. By using the compressor map prediction curve and Hysys simulation under dynamic conditions, the compressor performance can be analyzed and then used for process requirements in the field.
Evaluation of the effects of fatty ester isomerization and turpentine-derived additive introduction on biodiesel cold flow properties and oxidation stability Indarto, Antonius; Pradana, Yano Surya; Kembara Alam, Alif; Makertihartha, I Gusti Bagus Ngurah; Prakoso, Tirto; Soerawidjaja, Tatang Hernas
International Journal of Renewable Energy Development Vol 15, No 3 (2026): May 2026
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2026.61192

Abstract

Biodiesel is a cleaner and renewable combustion fuel that globally serves as an effective alternative to fossil diesel. The current application of this biofuel is still restricted to specific concentration due to its poor cold flow properties (CFPs) and low oxidation stability (OS). Later, isomerization process was offered to improve cold flow properties as well as oxidation stability. In this study, palm-biodiesel isomerization was carried out atmospherically using SO4/SnO2 catalyst, prepared via wet nitration method, in the stirred batch reactor at temperature of 200oC, catalyst loading of 10 wt%, stirring speed of 900 rpm, and under N2 flow. The performance of catalyst and the effect of fatty ester isomerization on CFPs and OS were investigated. For comparative study, the effect of bio-additive (turpentine oil and α-terpineol) introduction, at concentrations of 1−10 vol%, on CFPs and OS was also evaluated. The isomerization results demonstrated a conversion ratio of 12.54±0.60%, an isomerization selectivity of 75.92±5.79%, and an overall turnover frequency of 1.75×10−1±8.5×10−3 h−1. This reaction had a small reduction in pour point (ΔPP = ‒1oC), a minor elevation in cloud point (ΔCP = 0.50±0.15oC), and a slight improving effect in OS (ΔOS = 1.36 h). Furthermore, the optimum insertion of bio-additive was α-terpineol at concentration of 5 vol%, demonstrating a more significant enhancement in CFP parameters (ΔPP = ‒1oC; ΔCP = ‒1.75±0.15oC). Nevertheless, it significantly reduced OS level (ΔOS = ‒11 h), although the absolute value (OS = 10.36 h) remains compliant with international standards.
Co-Authors Abraham Zefanya Adhi, Tri Partono Aditya Nurfebriartanto Aditya Putranto Anggit Raksajati Aqsha Aqsha Ardian Nugra Baskoro Astri Nur Istyami Bunaidi, Rendi Danu Ariono Dea Yulistia Dian Shofinita Dwi Savitri, Nike Dwiwahju Sasongko Fanany, Muhammad Rifki Fathinah I. Hasyyati Giovanno Macario Purnomo Haditya Kukuh Purwanto Halim, Fadhli Haryo Winoto Herry Santoso Hoon Sik Kim Hwaung Lee Hyung Keun Song I Dewa Gede Arsa Putrawan Jae-Wook Choi Jelliarko Palgunadi Kariem, Muhammad Agus Kembara Alam, Alif Lienda A. Handojo Lienda Handojo, Lienda Makertihartha, I Gusti Bagus Ngurah Meiti Pratiwi Muhammad Agus Kariem Muhammad Reyhan Saadi Nurfebriartanto, Aditya Partono Adhi, Tri Prabowo, Harris Pradana, Yano Surya Pratiwi, Meiti Ramli, Yusrin Rosyid, Tanti S Sardenianto Sardenianto Sardenianto Septhian Marno Tatang Hernas Soerawidjaja Tirto Prakoso Tirto Prakoso Tri Partono Adhi Tri Partono Adhi Tri Partono Adhi Widoatmodjo, Sawidji Yansen Hartanto Yusrin Ramli