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All Journal Jurnal Teknologi Bulletin of Chemical Reaction Engineering & Catalysis The Journal of Pure and Applied Chemistry Research JGE (Jurnal Geofisika Eksplorasi) Jurnal IPTEK Jurnal Litbang Industri CHEMPUBLISH JOURNAL JOURNAL ONLINE OF PHYSICS Science and Physics Education Journal (SPEJ) Indonesian Mining Journal Communications in Science and Technology Martabe : Jurnal Pengabdian Kepada Masyarakat Jurnal Geofisika Jurnal Pengabdian Masyarakat Indonesia Jurnal IPTEK Bagi Masyarakat Prosiding Konferensi Nasional PKM-CSR Indonesian Journal of Chemical Studies (Indones. J. Chem. Stud.) Paradharma: Jurnal Aplikasi IPTEK Jurnal Pengabdian Masyarakat Pinang Masak International Journal of Renewable Energy Development Bulletin of Chemical Reaction Engineering & Catalysis Indonesian Mining Journal JURNAL REKAYASA KIMIA & LINGKUNGAN
Lenny Marlinda
Universitas Jambi
Agriculture, Biological Sciences & Forestry Arts Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences

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Journal : Indonesian Mining Journal

 1 
EFFECT OF VACUUM RESIDUE AND PETROLEUM BENZINE AS THE ADDITIVE CALORIFIC VALUE AND MOISTURE OF COAL Ezra Bella Ramadhani Putri; Wahyudi Zahar; Lenny Marlinda
Indonesian Mining Journal Vol 25, No 1 (2022): INDONESIAN MINING JOURNAL, Vol. 25 No. 1, April 2022
Publisher : Puslitbang tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol25.No1.2022.1260

Abstract

Upgrading the coal is a process that increases the calorific value of low-rank coal through decreasing the moisture content of the coal. This method usually uses mixed heavy oil to close the opened pores after coal upgrading. The additives have a molecule structure like heavy oil. The aim of this study is to determine the effect of additives on the moisture content and calorific value after coal upgrading process. Coal upgrading in this study applies several variations i.e., coal particle size and coal mass mixed with an additive which is a mixture of vacuum residue and petroleum benzine with a ratio of  0.005 g: 1 mL as a coater. Before upgrading process, the moisture content and calorific value of the coal is 13.39 %adb and 6,663 cal/g db. After the process, the lowest moisture content of the coal in the ratio of coal (b/v) and additives was 4:3 with 21.75% ad. The highest calorific value of the coal was shown in the ratio of coal (b/v) and additives 1:1 with 7,189 kcal/kg. The lowest moisture content is indicated by the particle size of -120 mesh. The highest calorific value of coal is shown by the particle size of -120 mesh.
PEMANFAATAN MINYAK BERAT HASIL PERENGKAHAN KATALITIK MINYAK PLASTIK POLYPROPYLENE-LOW DENSITY POLYETHYLENE UNTUK MENINGKATKAN KUALITAS LIGNIT Marlinda, Lenny; Mardhatillah; Raden Ilham; Rahmi; Muhammad Al Muttaqii
Indonesian Mining Journal Vol 27 No 2 (2024): Indonesian Mining Journal, October 2024
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol27.No2.2024.1544

Abstract

The most obvious characteristics of lignite are its high moisture content (30-50%) and relatively low calorific value compared to other types of coal. This causes low combustion efficiency, making it not optimal for use as fuel. In this study, the slurry dewatering process was applied to coal that has a low calorific value of 3,662 cal/g and a moisture content of 37.29%. The addition effect of heavy oil from catalytic cracking of Polypropylene-Low Density Polyethylene (PP/LDPE) plastic waste pyrolysis oil on improving quality of lignite was investigated in this study. Heavy oil was used as additive. The ratio of 120 mesh lignite to heavy oil used was 100:15, 100:30, 100:45, 100:60, 100:75, and 100:90 (g/mL). Coal was carried out with a slurry dewatering process in an autoclave at various temperatures of 140 and 150 °C for 60 min. The test results obtained the highest calorific value of 6,374 cal/g and the moisture content of 2.81% for a ratio of lignite to heavy oil of 100: 45 g/mL at a temperature of 140 °C.
PENGARUH PROSES HIDROTERMAL TERHADAP PENINGKATAN NILAI KALOR DAN PENURUNAN KADAR AIR PADA BATUBARA PERINGKAT RENDAH Marlinda, Lenny; Pane, Xena Maharani; Wiratama, Jarot; Zahar, Wahyudi; Khadafi, Muhammad Reza; Rahmi
Indonesian Mining Journal Vol 28 No 1 (2025): Indoneisan Mining Journal, April 2025
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol28.No1.2025.1539

Abstract

As a low-rank coal, brown coal is characterized to have high water content. It is required a method to improve coal quality that can be used for effective coal utilization. One of the methods is to apply thermal dewatering technology which focuses on improving the quality of low-rank coal using water medium and autoclave. The purpose of this study was to determine the effect of coal to water ratio (w/v) and the effect of particle size of a low rank-coal on water content and calorific value using the hydrothermal method. Coal was processed under hydrothermal conditions at 150 °C for 60 min. For a mixture of 100 g of 25 mesh coal and 50 mL of water, the calorific value and water content after the hydrothermal process reached 5,849 kcal/kg and 5.10% (adb), respectively. While for a mixture of 100 g of 40 mesh coal and 50 mL of water, the calorific value and water content after the hydrothermal process reached 5,789 kcal/kg and 4.94% (adb), respectively. The calorific value obtained increased from the initial value of 3,296 kcal/kg and the water content decreased from the initial value of 44.34% for the coal condition before hydrothermal process. It can be concluded that the hydrothermal process with heating without oxygen carried out by a hydrothermal reactor could increase the calorific value of low-rank coal and reduce water content.
Co-Authors . Rahmi, . Abdul Aziz Achmad Roesyadi Adriansyah, Riadi Al Muttaqii, Muhammad Al-Muttaqii, Muhammad Alkaf, Muhammad Rhezi Bayu Ishartono Danawati Hari Prajitno Denny Prabawa, Aditya Dewi, Aisha Andini Indira Dhian Eka Wijaya Diah Riski Gusti Dyah Puspitasari, Ratih Edwin Permana Edwin Permana Ermita Meisa Manulang Excel Emerlan Samiar Wasistha Ezra Bella Ramadhani Putri Fauziah, Sarah Fitri, Selta Hari Prajitno, Danawati Heriyanti Heriyanti, Heriyanti Heriyanti, Septina Is Ignatius Gunardi Indra Lasmana Tarigan Intan Lestari Intan Lestari ira kusuma dewi Khadafi, Muhammad Reza Ladiva Adinda Lia Anggresani Madyawati Latief Malikhah, Wukhoidatul Marbun, Maja Pranata Mardhatillah Muhammad Al Muttaqii Muhammad Al Muttaqii Muhammad Al Muttaqii Muhammad Al-Muttaqii Muhammad Al-Muttaqii Munifilia Ekasari Murti, Sri Djangkung Sumbogo NEVIATY PUTRI ZAMANI Ngatijo Novianda, Cici Nuraini, Syafira NURUL AZIZAH Nurul Pratiwi Pane, Xena Maharani Peri Oktiarmi Putri Pandulu, Clara Raden Ilham Rahmat Basuki Rahmi Rahmi Rahmi Rahmi Rahmi Reni Desriyanti Restina Bemis, Restina Reva Edra Nugraha Rif’at Syauqi Ritonga, Magdalena Ritonga, Magdalena Ritonga S.D. S. Murti Santiko, Erik Budi Septina Is Heriyanti Sri Djangkung Sumbogo Murti Sudibyo Sudibyo Sugeng Priyanto, Sugeng Tri Utami Vemileza Putri Wahyudi Zahar Wahyudi Zahar Wahyuningsih, Iga Wasistha, Excel Emerlan Samiar Wibimanyu, Putu Adityo Wiratama, Jarot yati, indri Yoga Andika, Oel Taradepa, Adhitya Eko Bagus Yuli Evrianti Br Rajagukguk Yusria Putri, Desta Yustia Wulandari Mirzayanti Yustinah Yustinah Zahar, Wahyudi