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Related Experiment Video

Updated: Jun 23, 2026

Reducing Willow Wood Fuel Emission by Low Temperature Microwave Assisted Hydrothermal Carbonization

Reducing Willow Wood Fuel Emission by Low Temperature Microwave Assisted Hydrothermal Carbonization

Published on: May 19, 2019

Reshaping interfacial heat supply in the Boudouard reaction through variable-frequency microwave fields.

Wei Liao¹, Haolin Liu¹, Mengyuan Wen¹

¹Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China; Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry (CAF), No. 16, Suojin Five Village, Nanjing 210042, China.

Bioresource Technology

|June 21, 2026

Summary

Variable-frequency microwave heating significantly enhances carbon dioxide to carbon monoxide conversion by enabling precise interfacial heat delivery. This method achieves a >35-fold increase in heat compensation and boosts CO yield, overcoming limitations of conventional heating for syngas production.

Keywords:

CO(2) utilization Dielectric properties Endothermic solid–gas reaction Interface entropy gradient Microwave-assisted biorefinery Sustainable carbon management

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Last Updated: Jun 23, 2026

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Area of Science:

Chemical Engineering
Materials Science
Energy Conversion

Background:

Syngas production via the Boudouard reaction (CO2 to CO) is crucial for fuels and chemicals.
Conventional heating methods struggle with inefficient interfacial heat supply, limiting CO2 conversion rates.
Precise control over heat delivery is essential for optimizing endothermic reactions.

Purpose of the Study:

To develop a novel variable-frequency microwave (VFM) heating strategy for efficient CO2-to-CO conversion.
To investigate the impact of microwave frequency on interfacial heat delivery and reaction dynamics.
To establish a framework for understanding and quantifying energy transfer in endothermic reactions.

Main Methods:

Experimental investigation of CO2-to-CO conversion using VFM heating.
Multiphysics simulations to analyze electric-field localization and heat deposition.
Entropy decomposition analysis to quantify heat generation sources.

Main Results:

VFM heating achieved over 35-fold enhancement in interfacial heat compensation (7.1 °C/W) compared to conventional microwaves.
Achieved a high energy-specific CO yield (8.3 mg/kJ) and 99.8% CO2 conversion at optimized frequencies.
Demonstrated superior heat replenishment capacity and stabilization of the endothermic reaction interface.

Conclusions:

VFM heating enables precise interfacial energy delivery, significantly improving CO2-to-CO conversion efficiency.
Frequency-matched coupling between electromagnetic fields and carbon materials optimizes heat compensation.
This approach provides a new pathway for efficient energy conversion in endothermic systems.