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All Journal ALKIMIA : Jurnal Ilmu Kimia dan Terapan Journal of Earth Energy Science, Engineering, and Technology
Kurnia, Dwi Miftha
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science Social Sciences

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Liquid Fuel From Polypropylene Plastic Wastes with Bentonite as Catalyst by Catalytic Cracking Process Kurnia, Dwi Miftha; Faizal, Muhammad
ALKIMIA Vol 5 No 2 (2021): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (621.534 KB) | DOI: 10.19109/alkimia.v5i2.10239

Abstract

Abstract. The aim of this project work is to convert waste plastics into useful fuel range hydrocarbon mixture. The catalytic cracking process of polypropylene plastic waste (mineral water cup) was performed in a fixed-bed reactor with bentonite catalyst, at five temperatures ranging from 150 to 350oC with percent catalyst of 4%.The amounts of liquid fuel produced, as well as the compositions of the resulting liquid fuel, were determined by Gas Chromatography-Mass Spectrometry. The influences of cracking parameters, such as temperature and catalyst mass, on product yields were investigated. The optimum conditions cracking of polypropylene plastics waste with bentonite as catalyst is at temperature of 350oC with 4% catalyst mass or20 grams. The highest liquid yield (41.5%) was obtained using 20 gram Bentonite catalyst at 350oC. The highest percent composition of C6H14, C7H16 andC8H18 in liquid product is 16.92%, 18.48%, and 12.22% respectively at temperature of 350oC.
Geomechanical Characterisation Analysis of Reservoirs Based on Well Logging Data for CO₂ Injection Applications Rusmaladewi, Fitri; Louhenapessy, Stevy; Hendrawan, Rezki Naufan; Kurnia, Dwi Miftha; Kurniawan, Randy Yusuf
Journal of Earth Energy Science, Engineering, and Technology Vol. 8 No. 3 (2025): JEESET VOL. 8 NO. 3 2025
Publisher : Penerbitan Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/7dve7558

Abstract

This study investigates reservoir geomechanical characterization for CO₂ injection applications in the Akimeugah Basin using well-logging and 2D seismic data as the basis for constructing a one-dimensional Mechanical Earth Model (MEM) for well FRD2. The main log data used include sonic logs (Vp, Vs), density, and other logs to calculate dynamic elastic parameters, rock strength (UCS, tensile strength), pore pressure, and in-situ stress profiles (Sv, SHmax, Shmin), which are then validated by horizon and fault interpretation from seismic sections. Analysis of stress polygons, stress profiles, and stereonet plots at depths of 3100–4000 ft indicates that the stress regime is dominated by Normal Faulting with a maximum horizontal stress direction (SHmax) of approximately 150°, with no indication of overpressure but with depth-dependent geomechanical sensitivity to changes in injection pressure. The evaluation results show that the deeper interval (around 4000 ft) exhibits higher rock strength, a wider safe pressure window, fracture gradients well above pore pressure, and narrower zones of potential failure, making it the most suitable and safest target for CO₂ injection, while the 3100–3500 ft interval remains prospective but requires stricter pressure control.
Co-Authors Hendrawan, Rezki Naufan Louhenapessy, Stevy Muhammad Faizal Randy Yusuf Kurniawan Rusmaladewi, Fitri