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- In relation to this article, we declare that there is no conflict of interest.
- Publication history
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Received May 16, 2024
Accepted August 14, 2024
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Effects of Hydrothermal Carbonization Process Parameters on Physicochemical Properties and Combustion Behavior of Maize Stalk Hydrochars
Abstract
Hydrothermal carbonization (HTC) is an eff ective method to improve the performance of biomass fuels. In this work, the
reusable maize stalk (MS) hydrochars were prepared at diff erent carbonization conditions, and the eff ects of carbonization
parameters on physicochemical properties, recovery rate, coalifi cation mechanism and combustion behavior of MS hydrochars
were investigated. The results show that with the increase of temperature and time, the particle size, O/C and H/C ratios,
fl ammability index and comprehensive combustion characteristic index of MS hydrochars decrease gradually, while the
calorifi c value, ignition temperature ( T i ), and burnout temperature ( T f ) increase gradually. The combustibility and combustion
reactivity of MS hydrochars are signifi cantly better than anthracite. Under the optimal carbonization conditions (260 ºC,
40 min, solid–liquid ratio of 2%), MS hydrochar has a high carbon content and calorifi c value, and the carbon content and
calorifi c value of MS are 66.85 and 22.36 MJ·kg −1 , respectively. HTC technology can eff ectively transform MS biomass
into high energy density solid fuel, which provides a theoretical basis for expanding the application fi eld of hydrochars.
