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All Journal Jurnal Teknologi Terapan Jurnal Ar Ro'is Mandalika (Armada)
Bambang Sudarmanta, Bambang
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Religion Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering Languange, Linguistic, Communication & Media Mathematics Mechanical Engineering

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STUDI KARAKTERISTIK REAKTOR GASIFIKASI TYPE DOWNDRAFT SERBUK KAYU DENGAN VARIASI EQUIVALENSI RATIO Suliono, Suliono; Sudarmanta, Bambang; Dionisius, Felix; Maolana, Imam
Jurnal Teknologi Terapan Vol 3, No 2 (2017): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (869.098 KB) | DOI: 10.31884/jtt.v3i2.60

Abstract

The depletion of fossil fuel reserves and natural gas makes people rethink to find alternative energy substitutes. Biomass is an alternative energy that is still abundant and has not been fully utilized. Gasification is one of alternative in gas making that change from solid fuel (wood powder) to thermochemical flammable gas. The research used downdraft gasification with experimental wood powder. The implementation of research was done in workshop of Indramayu State of Polytechnic, using batch system, it means once the import of biomass in the furnace from the beginning until the biomass out by 5 kg of wood powder biomass. Equivalence Ratio (ER) performed 4 variations namely: 1.01; 1.13; 1.34; 1.52. The recorded data are: temperature inside reactor, gasification operation time, air intake, syngas content, and flame visualization. The results obtained from the gasification process showed if the Equivalence Ratio (ER) is higher so the heating value of syngas decrease. LHV at ER 1.52 of 3980,306 Kj / m3 and the synthetis gas content decreased as much as 21,7806 %
Optimasi Produksi dan Purifikasi Hidrogen melalui Reformasi Uap Metana pada Reaktor Mikrokanal Menggunakan Simulasi DWSIM dan AspenPlus Christyanto, Dannar; Sudarmanta, Bambang
Jurnal Ar Ro'is Mandalika (Armada) Vol. 6 No. 3 (2026): JURNAL AR RO'IS MANDALIKA (ARMADA)
Publisher : Institut Penelitian dan Pengembangan Mandalika Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59613/armada.v6i3.6191

Abstract

Hydrogen is one of the clean energy vectors with great potential to support the transition toward a sustainable energy system. However, hydrogen production is still predominantly based on fossil-fuel processes, particularly Steam Methane Reforming (SMR), which is endothermic in nature and requires optimal process control to achieve high efficiency and purity. This study aims to optimize the hydrogen production and purification process through steam methane reforming in a microchannel reactor using a simulation-based approach. Microchannel reactors are selected due to their high surface-to-volume ratio, which enhances heat and mass transfer as well as reaction temperature stability. Process simulations were conducted using DWSIM software with the Peng–Robinson thermodynamic model to analyze the effects of operating parameter variations, including reformer temperature, operating pressure, and steam-to-methane ratio, on methane conversion and hydrogen mole fraction. The simulation results indicate that increasing the reformer temperature significantly enhances hydrogen production, reaching optimal conditions in the range of 900–950 °C, where the system approaches thermodynamic equilibrium. The integration of Water Gas Shift and Pressure Swing Adsorption (PSA) units within the simulated system is shown to improve hydrogen purity to above 98%. This study demonstrates that a simulation-based microchannel reactor approach is effective in determining optimal operating conditions and has strong potential to serve as a foundation for the development of efficient, sustainable, small-scale, and modular hydrogen production systems.
Effect of Hydrogen Mass Flow Rate on Performance and Emission Characteristics of a Dual-Fuel LPG Gas Engine: Experimental and Numerical Analysis Febrianto, Wigung Tri; Sudarmanta, Bambang
Jurnal Ar Ro'is Mandalika (Armada) Vol. 6 No. 3 (2026): JURNAL AR RO'IS MANDALIKA (ARMADA)
Publisher : Institut Penelitian dan Pengembangan Mandalika Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59613/armada.v6i3.6198

Abstract

Indonesia’s electricity sector remains heavily dependent on fossil fuels, with gas-based generation widely used for small- and medium-scale applications. Although liquefied petroleum gas (LPG) burns cleaner than coal and diesel, LPG-fueled engines still emit carbon-based pollutants. Hydrogen enrichment is a promising transitional strategy to improve combustion and reduce emissions without major engine modifications. This study evaluates the effect of hydrogen mass flow rate on the operational characteristics of an LPG gas engine operating in dual-fuel mode using combined experiments and numerical simulation. Experiments were performed on a single-cylinder, four-stroke LPG engine–generator operated at a constant 3000 rpm under steady-state electrical loads. Hydrogen was supplied at controlled mass flow rates while LPG remained the primary fuel. Performance parameters, air–fuel ratio, operating temperatures, and exhaust emissions were measured. In parallel, in-cylinder combustion was analyzed using ANSYS Forte, supported by a mesh sensitivity study to ensure numerical reliability. Hydrogen enrichment improved performance across the investigated load range, yielding maximum increases of 12.2% in shaft power, 17.2% in torque, and 8.2% in brake mean effective pressure. Specific fuel consumption decreased by up to 13.1%, while thermal efficiency increased by up to 13.5% compared with LPG-only operation. Hydrogen-enriched operation enabled leaner combustion at equivalent loads and reduced engine and lubricant temperatures by up to 12.2% and 8.3%, respectively. Emissions decreased, with maximum reductions of 8.2% in CO and 9.4% in HC. These outcomes indicate that hydrogen primarily functions as a combustion enhancer by accelerating flame propagation and promoting more complete oxidation, supporting LPG–hydrogen dual-fuel operation as a practical pathway toward lower-carbon distributed power generation.
Co-Authors Arif Rahman Saleh Özer, Salih Christyanto, Dannar Febrianto, Wigung Tri Felix Dionisius Hamzah Fansuri Lukman Atmaja Maolana, Imam Rosid Rosid, Rosid Sigit Mujiarto Suliono Suliono