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Related Experiment Video

Updated: Dec 20, 2025

Reducing Willow Wood Fuel Emission by Low Temperature Microwave Assisted Hydrothermal Carbonization
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Upgrading Wood Gas Using Bentonite Clay: A Multiscale Modeling and Simulation Study.

Matthew Lasich1

  • 1Department of Chemical Engineering, Mangosuthu University of Technology, Durban 4031, South Africa.

ACS Omega
|May 27, 2020
PubMed
Summary

Bentonite clay can upgrade wood gas, a renewable fuel, by over five percent using pressure swing adsorption. This process enhances the fuel

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Area of Science:

  • Renewable Energy
  • Materials Science
  • Chemical Engineering

Background:

  • Wood gas, a renewable fuel from biomass gasification, is crucial for rural energy needs.
  • Improving wood gas calorific value is essential for its efficient utilization.
  • Bentonite, a common clay mineral, is explored as a potential adsorbent for gas upgrading.

Purpose of the Study:

  • To assess bentonite's capacity for upgrading wood gas through pressure swing adsorption.
  • To improve the calorific value of wood gas.
  • To model a single-stage pressure swing adsorption system for wood gas purification.

Main Methods:

  • Grand canonical Monte Carlo molecular simulations were used to generate adsorption isotherms for wood gas components in montmorillonite.

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  • The Langmuir adsorption isotherm model was fitted to the simulation data.
  • A batch equilibrium approach coupled with adsorption isotherms modeled a pressure swing adsorption system.

    • Main Results:

    • Adsorption isotherms for key wood gas components (methane, CO, CO2, H2, N2, O2) were generated.
    • The Langmuir model accurately described component adsorption on montmorillonite.
    • A response surface analysis determined the impact of adsorbent quantity and operating pressure on calorific value enhancement.

    Conclusions:

    • The pressure swing adsorption system using bentonite can improve wood gas calorific value by over five percent.
    • Bentonite shows promise as an effective adsorbent for wood gas upgrading.
    • This study provides a computational framework for optimizing adsorbent-based gas purification systems.