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All Journal Jurnal Energi dan Lingkungan (Enerlink) International Journal of Renewable Energy Development
Sugeng, Dhani Avianto
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Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering

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PROSES HIDROGENASI MINYAK BATUBARA UNTUK PEMENUHAN TARGET MUTU PASAR Sugeng, Dhani Avianto
Jurnal Energi dan Lingkungan (Enerlink) Vol 4, No 1 (2008)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (284.058 KB) | DOI: 10.29122/elk.v4i1.1540

Abstract

A characterization of synthetic liquefied oil from coal was conducted to preparefor further treatment of its quality. One of few techniques in improving the coal oilis done through hydrotreatment process to remove its nitrogen, sulfur, oxygenand aromatics contents known as heteroatoms which make the oil stability notgood. Experiment using small-scale fixed bed reactor shows there is animprovement in the quality of recycle solvent used for coal liquefaction after firsthydrotreatment. coal slurry using first hydrotreated oil as solvent shows lowerviscosity than that of non-hydrotreated oil, and if mixed with coal from Banko, thecoal concentration could achieve as high as 50%. Nitrogen and sulfur contents inhydrotreated oil are reduced to negligible level and the storage stability isremarkably improved after hydrotreatment. The quality of fuel from secondhydrotreatment is still lower than that of petroleum productc in terms of ?cetanenumber?, ?smoke point?, contents of sulfur and aromatics.Kata kunci: hydrotreatment, smoke point, fixed bed reator, heteroatom,synthetic liquefied oil, recycle solvent
TECHNICAL ASSESSMENT OF UBC PILOT PLANT USING COMPUTER PROCESS SIMULATION Hanif, Muhammad; Sugeng, Dhani Avianto; Cruyff, Johan
Jurnal Energi dan Lingkungan (Enerlink) Vol 6, No 2 (2010)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (288.713 KB) | DOI: 10.29122/elk.v6i2.1560

Abstract

Indonesia memiliki sumber daya batubara peringkat rendah dalam jumlah yangberlimpah (± 38 juta ton).Jenis batubara tersebut belum sepenuhnya dikajimeskipun diketahui memiliki berbagai kelebihan seperti kadar abu dan sulphurrendah. Teknologi UBC didedikasikan untuk memproduksi batubara yangdengan nilai jual yang tinggi dan mampu meningkatkan pemanfaatan batubaraperingkat rendah di Indonesia. Tulisan ini membahas evaluasi proses UpgradedBrown Coal (UBC) dengan menggunakan data pengoperasian pilot plant UBC diPalimanan. Lingkup kegiatan ini juga merupakan lingkup tanggungjawab BPPTdalam kerjasaa Jepang dengan Indonesia di bidang pengembangan teknologiUBC.Keywords: batubara peringkat rendah, upgraded brown coal (UBC), pilot plant
PENINGKATAN MUTU MINYAK BATUBARA DENGAN PROSES HIDROKATALITIK Syafrinaldi, Ade; Sugeng, Dhani Avianto
Jurnal Energi dan Lingkungan (Enerlink) Vol 3, No 1 (2007)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (167.721 KB) | DOI: 10.29122/elk.v3i1.1551

Abstract

The result of hydrotreating coal derived oil was investigated. Compared to crudepetroleum oil, oil produced from liquefaction of coal, the coal liquid needs afurther treatment before being used as same grade of petroleum products. Thestorage stability and most important the quality of the coal liquid oil are the mostcritical factors for this matter. The concentrations of nitrogen, sulfur, oxygen andaromatic hydrocarbon are way much too high for the coal oil to be directlyconverted into synthetic fuel like gasoline, kerosene or gas oil. In a brown coalliquefaction plant, this special unit is integrally designed with the whole plant, wellknown as the inline hydro-treatment unit, which has two process stages , the firsthydro-treatment and the second hydro-treatment. This paper will discuss thecharacteristic of the hydro-treated coal liquid oil concerning its storage stabilityand quality.Kata kunci: coal liquefaction, storage stability, quality, coal liquid oil, inlinehydro-treatment, dry sludge
Synergistic co-pyrolysis of Gracilaria waste and waste tires: Enhancing bio-oil quality through thermal and chemical bond optimization Masfuri, Imron; Mohamad, Shaza Eva; Sugeng, Dhani Avianto; Amdrullah, Apip; Yahya, Wira Jazair
International Journal of Renewable Energy Development Vol 14, No 5 (2025): September 2025
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.61202

Abstract

The increasing demand for renewable energy and sustainable waste management has prompted research into innovative conversion technologies. This study explored the co-pyrolysis of Gracilaria waste (GW) and waste tires (WT) as a potential approach to improving bio-oil quality by enhancing its hydrocarbon content and reducing oxygenated compounds. The novelty of this study lay in providing new mechanistic insights into the co-pyrolysis process by systematically analyzing the thermal degradation behavior and chemical bond evolution of GW-WT mixtures using a combination of TGA, FTIR, and GC-MS techniques. This detailed chemical transformation analysis differentiated the study from prior research that primarily focused on product yields. The study analyzed the thermal degradation behavior and chemical bond transformation of GW and WT mixtures during pyrolysis, hypothesizing that the addition of WT to GW would enhance the hydrocarbon profile and thermal stability of the resulting bio-oil. Thermogravimetric analysis (TGA) was employed to evaluate the decomposition behavior of five different GW-WT blend ratios under an inert atmosphere, while Fourier Transform Infrared Spectrosco py (FTIR) was used to assess chemical functional group evolution in both raw materials and pyrolytic products. The results revealed that GW pyrolysis exhibited a single weight loss peak (100–350°C) with a total weight loss of 40%, while WT pyrolysis followed a two-stage decomposition process (200–500°C) with a total weight loss of 65%. The GW-WT mixture resulted in a total weight loss of approximately 60%, indicating a synergistic effect between the two feedstocks. FTIR analysis confirmed a reduction in hydroxyl (-OH) groups and an increase in hydrocarbon-related bonds (C=C, C-C, and C-H), demonstrating improved bio-oil composition. These findings suggested that incorporating waste tires into Gracilaria pyrolysis enhanced bio-oil quality and hydrocarbon content, offering a promising approach for biomass valorization and sustainable energy production. Future research should explore process optimization through catalyst integration and scale-up potential for industrial applications.
Co-Authors Amdrullah, Apip Cruyff, Johan Masfuri, Imron Mohamad, Shaza Eva Muhammad Hanif Syafrinaldi, Ade YAHYA, WIRA JAZAIR