A Combination of Hydrothermal Carbonization under CO2 and High-Temperature Steam Gasification of Bagasse

Hong Nam Nguyen; Phuong Thu Le; Thu Phuong Nguyen; Thi Hai Do; Thi Mai Thanh Dinh

doi:10.62239/jca.2025.001

Authors

Hong Nam Nguyen University of Science and University of Hanoi, Vietnam Academy of Science and Technology
Phuong Thu Le University of Science and Technology of Hanoi, Vietnam Academy of Science and Technology
Thu Phuong Nguyen Institute for Tropical Technology, Vietnam Academy of Science and Technology
Thi Hai Do Faculty of Basic Science, Hanoi University of Mining and Geology
Thi Mai Thanh Dinh University of Science and Technology of Hanoi, Vietnam Academy of Science and Technology

DOI:

https://doi.org/10.62239/jca.2025.001

Keywords:

Bagasse, gasification, hydrothermal carbonization

Abstract

This research explored the combined process of hydrothermal carbonization under CO₂ atmosphere and high-temperature steam gasification of bagasse, a plentiful biomass in Vietnam. The bagasse underwent HTC at 200°C in a 100% N₂ and CO₂ atmosphere, with a bagasse-to-water ratio of 1:8 and a residence time of 7200 s. The resulting hydrochar was then used for steam gasification at 900°C under 100% steam. A comparative experiment using untreated bagasse was served as a baseline. The findings reveal significant improvements in fixed carbon content and higher heating value of the hydrochar compared to the original biomass. Hydrochar also demonstrated faster conversion compared to that of raw bagasse, enhancing the efficiency of gasification. Furthermore, the syngas produced from the hydrochar resulted in 5% higher concentrations of both H₂ and CO. These enhancements in gasification performance suggest promising possibilities for the more efficient and sustainable use of bagasse in energy production.

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