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ANALYSIS OF THE DESIGN OF A TUBE PHOTOBIOREACTOR FOR CARBON CAPTURE OF EXHAUST GAS IN SINGLE-CYLINDER ENGINE VEHICLES USING MICROALGAE Czarthrya Indra Prastha; Boni Sena; Farradina Choria Suci; Hendra Nur Arifin
Purifikasi Vol 25 No 1 (2026): Journal Purifikasi
Publisher : Department of Environmental Engineering-Faculty of Civil, Planning, and Geo Engineering. Institut Teknologi Sepuluh Nopember, Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/purifikasi.v25i1.529

Abstract

The increase in carbon dioxide (CO₂) emissions from transportation significantly contributes to global warming, necessitating innovative carbon capture solutions. This study aims to analyze the exhaust gas characteristics of a single-cylinder Otto cycle engine as a basis for designing a tubular photobioreactor for carbon capture using microalgae. The research method involves stoichiometric analysis of octane (C₈H₁₈) combustion, thermodynamic calculations of exhaust gas flow rate, and mathematical modeling of photobioreactor design parameters, including volume, illumination surface area, hydraulic retention time (HRT), Reynolds number, and CO₂ mass transfer rate. The stoichiometric combustion analysis shows that 1 mol of C₈H₁₈ produces 8 mol of CO₂, which theoretically can be fully utilized in the photosynthesis process to generate 8 mol of biomass (CH₂O). The designed tubular photobioreactor has a total volume of 3.33 liters, an illumination surface area of 0.21 m², and an HRT of 300 seconds under a flow rate of 0.67 L/min. The Reynolds number of 392 indicates laminar flow conditions, with a CO₂ transfer capacity of approximately 10.5 g/hour. These results demonstrate the potential integration of internal combustion engine exhaust gas with a tubular photobioreactor system as a small-scale carbon capture approach.
ANALYSIS OF MICROALGAE CARBON CAPTURE IN EXHAUST GAS FROM A SINGLE CYLINDER ENGINE IN A FLAT PANEL MODEL DESIGN Muhammad Ersa Abdullah; Boni Sena; Hendra Nur Arifin; Novela Thresia Pandiangan
Purifikasi Vol 25 No 1 (2026): Journal Purifikasi
Publisher : Department of Environmental Engineering-Faculty of Civil, Planning, and Geo Engineering. Institut Teknologi Sepuluh Nopember, Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/purifikasi.v25i1.531

Abstract

Carbon dioxide (CO₂) emissions from gasoline engines are one of the contributors to greenhouse gases in the atmosphere. Single-cylinder gasoline engines widely used in motorcycles produce exhaust gases containing CO₂ which has the potential to be used as a carbon source for microalgae. This study aims to analyze the potential for CO₂ absorption from single-cylinder gasoline engine exhaust gases using microalgae in a flat-panel photobioreactor through a mathematical modeling approach. The research method was carried out by determining engine parameters and microalgae kinetic parameters based on literature studies, then calculating exhaust gases and modeling CO₂ absorption using a mass balance, gas-liquid mass transfer, and the Monod model of microalgae growth kinetics. The calculation results show that the engine produces a CO₂ mass rate of approximately 1.545 × 10⁻³ kg/s. The analysis results indicate that microalgae have the potential to utilize CO₂ as a carbon source for biomass growth in a photobioreactor system.