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All Journal Jurnal Rekayasa Proses Reaktor International Journal of Renewable Energy Development Journal of Engineering and Technological Sciences Communications in Science and Technology Jurnal Chemurgy Chemistry Indonesian Journal of Chemical Research Jurnal Rekayasa Proses Indonesian Journal of Energy ASEAN Journal of Chemical Engineering Jurnal Teknik Kimia Indonesia Jurnal Al Ulum: LPPM Universitas Al Washliyah Medan International Journal of Renewable Energy Development Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Rekayasa Proses Journal of Engineering and Technological Sciences Kimia Padjadjaran
Rizkiana, Jenny
Institut Teknologi Bandung
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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Palm oil biofuels demystification: The needs of standardized life cycle assessments and source derivatization Melia Laniwati; Tirto Prakoso; Jenny Rizkiana; Anita Kusumawardhani; Haryo Pandu Winoto
Communications in Science and Technology Vol 11 No 1 (2026)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.11.1.2026.1859

Abstract

The implementation of binary renewable-versus-fossil policy frameworks has the effect of obscuring the environmental costs and overstating the sustainability of palm oil biofuel. This review examines life cycle assessment (LCA) studies and regulatory frameworks, demonstrating that land-use change (LUC) is the predominant source of greenhouse gas and deforestation poses a threat to over 80% of species in production regions. Inconsistent system boundaries have been found to hinder comparability, with certification schemes including RSPO, ISPO, and EU RED II frequently overlooking LUC data, thus perpetuating unsustainable plantation strategies. As one of the most imminent solutions, used cooking oil (UCO) appears as a viable alternative, exhibiting a carbon intensity that is more than 60 % lower than that of conventional jet fuel and potentially resulting in a reduced depletion of fossil resources. However, only approximately 20% of global domestic UCO is recycled and 85% of regions lack UCO-specific legislation. A three-pillar framework is proposed: harmonized LCA with mandatory LUC accounting, scaled UCO valorization, and biodiversity-friendly practices including agroforestry and castor cultivation on degraded lands. It is reported that these measures can reduce emissions by 67.2% without compromising land integrity or food security. The notion of directly comparing the non-use of palm oil with the complete disregard for its unsustainability may be alleviated in the future by regarding some of the aspects proposed in this study.
Model Validation of Biomass-Coal Blends Co-Pyrolysis to Produce Hybrid Coal Aghietyas Choirun Az Zahra; Hendi Aviano Prasetyo; Jenny Rizkiana; Winny Wulandari; Dwiwahju Sasongko
Indonesian Journal of Energy Vol. 2 No. 2 (2019): Indonesian Journal of Energy
Publisher : Purnomo Yusgiantoro Center

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33116/ije.v2i2.41

Abstract

Co-pyrolysis of coal and biomass blend to produce hybrid coal has recently been experimentally studied by some previous researchers. For similar generated energy, a newly developed hybrid coal is claimed to be more environmentally friendly compared to the coal only due to the release of neutral CO2. To acquire a better understanding of co-pyrolysis of coal and biomass blend, an experiment had been carried out in a tubular furnace reactor. For this purpose, the blends of constant mass composition of 20 wt% sawdust and 80 wt% low-rank coal were used throughout the study. It was found from the experiment that approximately 42.1% carbon, and 1.6% of ash were produced from the co-pyrolysis blend. Then, a steady state simulation of co-pyrolysis was developed using Aspen Plus v8.8 to predict the hybrid coal carbon content and required heat to perform the co-pyrolysis. The model simulation showed that hybrid coal yielded 44.0% carbon, which was at 4.5% deviation from the experimental study. The model had also been successfully used to estimate heat required to produce hybrid coal. It predicted that the equivalent heat of 336.2 kW was required to produce hybrid coal from 1,000 kg/h blend feed. The heat generated by the modeling of sawdust biomass combustion for fuel purposes was also estimated to supply heat for endothermic co-pyrolysis. It was found that 1,000 kg/h sawdust was predicted to be equivalent to 371.4 kW. This suggests that for scaling up purpose, ratio of sawdust fuel to blend feed of 1:1.1 is sufficient for this process.
TERMOGRAVIMETRI ANALISIS ULTIMAT DAN PROKSIMAT BIOMASSA SERTA PENENTUAN NILAI KALOR Rifqi Sufra; Herri Susanto; Jenny Rizkiana; Suharto Suharto; Arysca Wisnu Satria
Jurnal Al Ulum LPPM Universitas Al Washliyah Medan Vol. 14 No. 1 (2026): Jurnal Al Ulum: LPPM Universitas Al Washliyah Medan
Publisher : UNIVERSITAS AL WASHLIYAH (UNIVA) MEDAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47662/alulum.v14i1.1170

Abstract

Biomass characterisation is important for knowing the contained components in biomass. Some types of biomass studied were wood of acacia (Acacia mangium), gamal (Gliricidia sepium), coconut shell (Cocos nucifera) charcoal, and wood charcoal, for the gasification process through proximate analysis, ultimate analysis, and determination of high heating value (HHV). Ultimate analysis data utilised thermogravimetric analysis (TGA) for efficiency. The characterisation results show that coconut shell charcoal and wood charcoal have the highest fixed carbon content (72.66% and 68.98%) and higher C element (57.87% and 54.94%) as well as lower ash content compared to acacia wood and gamal wood, resulting in the highest calorific value (30.01 and 22.05 mJ/kg) and potentially better gasification performance. Conversely, acacia wood and gamal wood show relatively higher volatile matter content (64.03% and 76.38%) and ash (18.88%), resulting in lower calorific values. Overall, the research results indicate that coconut shell charcoal and wood charcoal are more recommended as the primary fuel in the gasification system.
Co-Authors Adrian Hartanto Tandias Aghietyas Choirun Az Zahra Aisyah Ardy Anita Kusumawardhani Anton Irawan Arysca Wisnu Satria Auliardi, Dzaky Az Zahra, Aghietyas Choirun Azis Trianto Azzindi, Muhammad Ilham Bryan Bryan Bustomi, Agus Tendi Ahmad Carolus Borromeus Rasrendra Cengko, Geraldi Daniel Yonathan, Daniel Dwi Hantoko Dwiwahju Sasongko Dwiwahju Sasongko Dwiwahju Sasongko Gozali, Edbert Guan, Guoqing Guoqing Guan Hanny Hafiar Hary Devianto Hendi Aviano Prasetyo Hendi Aviano Prasetyo Heri Rustamaji Herri Susanto Herri Susanto Hijran, Azra I.G.B Ngurah Makertihartha I.G.B. Ngurah Makertihartha I.G.B.N. Makertihartha Inga Shaffira Rubani Istyami, Astri Nur Jahsy, Nursayyidah Ainun Joko Waluyo Melia Laniwati Melia Laniwati Gunawan Mi Yan Muhammad Afif Ridha Muhammad Arif Nuning Yanti Damayanti Nurrusyda, Fajriana Shafira Nursayyidah Ainun Jahsy Oki Muraza Petric Marc Ruya Pramujo Widiatmoko Pratiwi, Meiti Rasrendra, Carolus Barromeus Rifqi Sufra Rubani, Inga Shaffira Sanggono Adisasmito Saputera, Wibawa Hendra Sasongko, Dwiwahju Semeru, Husain Akbar Septhian Marno Slamet Handoko Subagjo Subagjo Suharto Suharto Tandias, Adrian Hartanto Tantra Diwa Larasati Tatang Hernas Soerawidjaja Thadeo, Francesco Tirto Prakoso Tirto Prakoso Wibisono Yamin Wibisono Yamin Widiatmoko, Pramujo Winny Wulandari, Winny Winoto, Haryo Pandu Yana Meliana Yazid Bindar Yogi W. Budhi Yogi Wibisono Budhi