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May 21, 2026MachinesOpen Access

Hydrogen Enrichment in Methanol Dual-Fuel CI Engines: A Computational Assessment of Engine Performance and Major Combustion Parameters and Emissions

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Authors

THTakwa HamdiSMSamuel MolimaJHJuan J. Hernández

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Overview

Numerical assessment shows hydrogen enrichment improves efficiency and reduces emissions in methanol-diesel dual-fuel engines, indicating its potential importance.

Key Points

  • This work aims to assess the impact of hydrogen enrichment on engine performance and emissions in methanol-diesel dual-fuel compression ignition engines.
  • Conducted numerical simulations using the Unsteady Reynolds-Averaged Navier–Stokes (URANS) equations.
  • Incorporated the RNG k–ε turbulence model and Eddy Dissipation Concept for turbulence-chemistry interaction.
  • Validated the numerical model against experimental data at a 45% methanol substitution ratio.
  • Hydrogen enrichment from 5% to 20% increases Sauter mean diameter from 20.2 µm to 28.0 µm (+38%).
  • Peak in-cylinder pressure rises from 75.2 to 79.1 bar (+5.2%) and peak heat release rate increases from 129 to 211 J/°CA (+63.6%).
  • CO2 emissions decrease by 24%, while NOₓ emissions double from 0.10 g/kWh to 0.21 g/kWh.

Cite This Study

Hamdi et al. (2026) studied this question.

synapsesocial.com/papers/6a0ea17cbe05d6e3efb6029fhttps://doi.org/10.3390/machines14050563
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Impact of Hydrogen Enriched Air and Ethanol-Diesel Fuel Blends on Combustion, Performance and Emission behaviour of CI Engine2025
  2. 2Hydrogen-assisted methanol combustion in internal combustion engines: Effects of blending ratio and injection strategy on performance and emissions2026
  3. 3Numerical and experimental assessment of hydrogen enrichment effects on ci engine characteristics fuelled with dual biodiesel blends: A comprehensive study2026
  4. 4High hydrogen-fraction enrichment in a natural-gas spark-ignition engine: CFD analysis of combustion behavior and emissions2026
  5. 5Decoupled multi-fuel combustion control in CI engines: A staged hydrogen-assisted framework for resolving emission-efficiency trade-offs2026