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All Journal Indonesian Journal of Chemical Science Journal of Energy, Material, and Instrumentation Technology Bulletin of Chemical Reaction Engineering & Catalysis
Wawan Rustyawan
Jurusan Teknik Kimia Fakultas Teknik UNDIP Semarang Jl. Prof. Soedarto, SH, Tembalang, Semarang 50239, Telp.(024)7460058
Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics

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Pengaruh Temperatur dan Rasio H2/Hidrokarbo Menggunakan Katalis CoMo/γ-Al2O3 pada Hydrotreating Combined Gas Oil Sucipto, Lukman; Rustyawan, Wawan; Jumaeri, Jumaeri; Alighiri, Dante; Wahyuni, Sri
Indonesian Journal of Chemical Science Vol 8 No 3 (2019)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Catalytic hydrodesulfurization of Combined Gas Oil (CGO) was used  CoMo/ -Al2O3 catalyst. The reaction was carried out at the trickle bed reactor with temperature 265, 300, 300, 330°C and H2/Hydrocarbons ratio 288 and 310 m3/m3; pressure 65atm and LHSV 1.8 h-1. The study aims to determined the effect of H2/Hydrocarbons ratio and temperature in reducing sulfur content from CGO feeds. The Hydrotreating products were analyzed by Total Nitrogen Total Sulfur (TNTS), Gas Chromatography Mass Spectrometry (GC-MS), and Fourier Transform Infra Red (FTIR). HDS product spesifications also analyzed using picnometer, Total Acid Number (TAN), and Doctor test Solution. The results of the analysis catalytic HDS test showed that the temperature range of 265-330°C increased and the H2/Hydrocarbons ratio 288-310 Nm3/m3, the HDS conversion was increased until 91.94%. The value of rate HDS (kHDS) also increased with temperature and H2/Hc ratio until 1,46x10-7 s-1.  The minimum energy activation required by the catalytic hidrodesulfurization reaction in ratio H2/Hc 288 m3/m3 was 54,25 kJ/mol. Keywords : hydrotreating, Catalyst CoMo/ -Al2O3, temperature, H2/Hc ratio
Pengaruh Temperatur dan Rasio H2/Hidrokarbo Menggunakan Katalis CoMo/γ-Al2O3 pada Hydrotreating Combined Gas Oil Sucipto, Lukman; Rustyawan, Wawan; Jumaeri, Jumaeri; Alighiri, Dante; Wahyuni, Sri
Indonesian Journal of Chemical Science Vol 8 No 3 (2019)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v8i3.33509

Abstract

Catalytic hydrodesulfurization of Combined Gas Oil (CGO) was used CoMo/ -Al2O3 catalyst. The reaction was carried out at the trickle bed reactor with temperature 265, 300, 300, 330°C and H2/Hydrocarbons ratio 288 and 310 m3/m3; pressure 65atm and LHSV 1.8 h-1. The study aims to determined the effect of H2/Hydrocarbons ratio and temperature in reducing sulfur content from CGO feeds. The Hydrotreating products were analyzed by Total Nitrogen Total Sulfur (TNTS), Gas Chromatography Mass Spectrometry (GC-MS), and Fourier Transform Infra Red (FTIR). HDS product spesifications also analyzed using picnometer, Total Acid Number (TAN), and Doctor test Solution. The results of the analysis catalytic HDS test showed that the temperature range of 265-330°C increased and the H2/Hydrocarbons ratio 288-310 Nm3/m3, the HDS conversion was increased until 91.94%. The value of rate HDS (kHDS) also increased with temperature and H2/Hc ratio until 1,46x10-7 s-1. The minimum energy activation required by the catalytic hidrodesulfurization reaction in ratio H2/Hc 288 m3/m3 was 54,25 kJ/mol. Keywords : hydrotreating, Catalyst CoMo/ -Al2O3, temperature, H2/Hc ratio
Analysis of the Effect of Variations of Silica Concentration on Synthesis γ-Al2O3 Fuadiyah, Nadhifatul; Marjunus, Roniyus; Rustyawan, Wawan; Syafriadi, Syafriadi
Journal of Energy, Material, and Instrumentation Technology Vol 5 No 1 (2024): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v5i1.144

Abstract

Research has been carried out to analyze the effect of variations in silica concentration on the synthesis of γ-Al2O3. This research was conducted to determine the variation of Silica against the support γ-Al2O3which is the best as a hydrotreating catalyst in the green fuel industry by using several physical characteristics and analyzing the effect of silica variations on the surface area, pore volume, and pore size of the support. This study uses materials such as Boehmite (AlOOH), equates, 25% NH4OH solution, 6% HNO3, and several variations of Silica such as (Carboxyl, SIRAL, and ZSM). In the process of making supports γ-Al2O3with the sol-gel method in order to homogenize the solutions and silica powders as a buffer variant, it becomes AlOH powder, which is then printed with a press and calcined at a temperature of 550oC gradually to become powder.buffer γ-Al2O3. From the study results, the best variation of γ-Al2O3 silica buffer was carboxyl with a concentration of 6% because several characterization studies showed superior results to γ-Al2O3 support without silica variation. The results of the Surface Area Analyzer characterization greatly affect the hydrotreating catalyst process in the green fuel industry, namely the γ-Al2O3 buffer with the addition of 6% silica carboxyl concentration. This is because a large surface area, pore size, and large pore volume can contain more impregnant solution, and the amount of active phase dispersed will also be greater.
Performance Test of Various Indonesian Natural Zeolites as Composite Components of NiMo/Al2O3-Zeolite Catalysts for Hydrocracking Used Cooking Oil into Biohydrocarbons Kurniawan, Amar Ariza; Rustyawan, Wawan; Ibadurrohman, Muhammad
Bulletin of Chemical Reaction Engineering & Catalysis 2025: BCREC Volume 20 Issue 1 Year 2025 (April 2025)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20254

Abstract

Due to increasing demand for alternative energy sources, nonedible used cooking oil is being converted into biohydrocarbons as an eco-friendly renewable option. This study explores the use of three Indonesian zeolites; Lampung, Bayah, and Tasikmalaya as a composite components of NiMo/Al2O3-Zeolite catalysts to enhance conversion and yields, promoting the use of sustainable domestic resources. The NiMo/γ-Al2O3-zeolite catalyst, with alumina-to-zeolite ratios of 75:25 and 25:75, effectively converted used cooking oil into biohydrocarbons products—green diesel and gasoline. The NiMo/γ-Al2O3 (75%)-Bayah Natural Zeolite (25%) catalyst exhibited a surface area of 194 m²/g, pore volume of 0.45 cm3/g, 7.01% Mo content, and a crystal size of 117.74 nm. At 370 °C, this catalyst achieved a 93% conversion, with GC-simdis analysis confirming 13% gasoline and 78% diesel fractions. This research demonstrates that Indonesian natural zeolites can be effectively used to convert used cooking oil into biohydrocarbons, achieving high conversion and desired product selectivity. Copyright © 2025 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Effect of Ammonia, Urea, and Magnesium Modification on γ-Al2O3 Support in Enhancing the Catalytic Performance for Hydrodemetallization and Hydrodesulfurization Rustyawan, Wawan; Makertihartha, I. G. B. N.; Muraza, Oki; Gamar, Ismal; Nurdini, Nadya; Kadja, Grandprix T.M.; Rasrenda, Carolus B.
Bulletin of Chemical Reaction Engineering & Catalysis 2025: BCREC Volume 20 Issue 2 Year 2025 (August 2025)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20360

Abstract

This research investigates the modification of γ−Al₂O₃ using ammonia, urea, and magnesium acetate to enhance its catalytic properties for hydrodemetallization (HDM) and hydrodesulfurization (HDS). Structural modifications affected the mineral composition, crystal size distribution, and textural properties of the support, with boehmite crystal sizes consistently ranging from 7 to 10 nm. Textural analysis indicated that alumina supports modified with urea and ammonia demonstrated enhanced characteristics, including elevated specific surface area (SBET), pore volume (VT), and pore size distribution (d), which are essential for catalytic performance. The modified catalyst (HM) exhibited significant hydrodemetalation efficiency, attaining metal removal rates of 98% for iron, 71% for vanadium, and 99% for nickel. In the HDS reaction, HM demonstrated the highest sulfur conversion of 20.9% at 315 °C, due to its capacity to sustain active site availability. The primary cause of catalyst deactivation was metal deposition, which resulted in pore blockage and diminished efficiency. The findings underscore the importance of support modification in enhancing catalytic performance, indicating HM as a viable catalyst for future heavy oil refining applications. Copyright © 2025 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Co-Authors - Jumaeri Alighiri, Dante Fuadiyah, Nadhifatul Gamar, Ismal Kadja, Grandprix T.M. Kurniawan, Amar Ariza Makertihartha, I. G. B. N. Marjunus, Roniyus Muhammad Ibadurrohman Muraza, Oki Nurdini, Nadya Rasrenda, Carolus B. Sri Wahyuni Sucipto, Lukman Syafriadi Syafriadi