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All Journal Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin
H.S. Tira
[Scopus ID: 55382885200] Universitas Mataram
Aerospace Engineering Automotive Engineering Mechanical Engineering Physics

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Efektifitas arang aktif tongkol jagung dalam menurunkan emisi kendaraan bermotor berbahan bakar ganda H.S. Tira; Y.A. Padang; A. Mulyanto; S. Syahrul; S. Salman; D. Putra
Dinamika Teknik Mesin Vol 14, No 2 (2024): Dinamika Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v14i2.829

Abstract

Emission reduction through after treatment processes has become one of the options to minimize the adverse effects of two-wheeler emissions. Activated charcoal adsorbents have been proven effective in reducing emissions to a certain extent. In this study, corn cob charcoal activated with a 15% NaCl solution serves as the adsorbent. The adsorbent used is shaped into particles with a mesh size of 10. The adsorbent is placed in the modified motorcycle muffler. Testing is conducted on two-wheeled vehicles operated using the dual-fuel method, where biogas and pertalite are used as fuels. With this method, fuel concentrations are obtained significantly smaller compared to vehicles without emission reduction methods. Testing is carried out for 2 hours to determine the durability of the adsorbent in absorbing exhaust gas emissions. Based on the test results, where data collection is conducted every 10 minutes, the concentrations of emissions including hydrocarbons (HC), carbon monoxide (CO), and carbon dioxide (CO2) initially decrease and then rise again after several minutes. This indicates that the adsorbent effectively reduces emissions in a relatively short duration. However, the effectiveness of corn cob activated charcoal in reducing these three emissions varies, with the adsorbent showing good performance in reducing HC
Numerical study of exhaust flow behavior in a calcium carbide waste adsorber for two-wheel vehicle applications H.S. Tira; Y.A. Padang; N. Kaliwantoro; A.D. Catur; I.G.N.K. Yudhyadi; S. Rahman
Dinamika Teknik Mesin Vol 16, No 1 (2026): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v16i1.1247

Abstract

Calcium carbide waste has demonstrated potential as an adsorber material for motorcycle exhaust emission control; however, the internal flow and thermal mechanisms governing its performance remain unclear. This study presents a computational fluid dynamics (CFD) analysis of exhaust gas flow through a calcium carbide waste adsorber to elucidate pressure, velocity, temperature, and turbulence characteristics. Simulations were conducted for adsorber lengths of 50, 100, and 150 mm, with the 150 mm configuration selected as a representative case due to similar overall trends. The results indicate a gradual pressure reduction along the exhaust system, flow acceleration within the adsorber due to cross-sectional constriction, and non-uniform temperature distribution influenced by asymmetric flow patterns. Turbulence kinetic energy increases upon gas entry into the adsorber and varies with adsorber length, highlighting the role of geometry in flow mixing and turbulence dissipation. These findings provide physical insight into the mechanisms underlying the emission reduction observed in previous experimental studies.
Co-Authors A. Mulyanto A.D. Catur D. Putra I.G.N.K. Yudhyadi N. Kaliwantoro S. Rahman S. Salman S. Syahrul Y.A. Padang Y.A. Padang