首页|Recovery of value-added compounds through fast pyrolysis of apple pomace hydrochar

Recovery of value-added compounds through fast pyrolysis of apple pomace hydrochar

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  • NSTL
  • Elsevier
© 2024 Elsevier B.V.The environmental challenges associated with food production can be addressed via the thermochemical upcycling of agro-industrial biomass. Two such methods, hydrothermal carbonization (HTC) and pyrolysis, can be coupled to first reduce the water content of wet biomass wastes by producing a hydrochar (HC) via HTC and then a bio-oil via pyrolysis of the HC. However, HTC of biomass results in the formation of secondary char (SC), an amorphous tar-like mixture resulting from organic compounds released into the aqueous phase that adsorb, recondense and polymerize on the parent biomass. This study investigated how HTC temperature impacts the formation of SC from apple pomace and the SC's subsequent impact on fast pyrolysis products. HCs were produced at temperatures of 175°C, 200°C, and 250°C. Lower HTC temperatures favor the formation of biorefinery platform chemicals such as 5-hydroxymethylfurfural and levulinic acid, while higher temperatures result in increased lignin degradation products (i.e., phenolics). HCs were subjected to fast pyrolysis before and after SC extraction in two analytical pyrolysis instruments. Fast pyrolysis of HC produced compounds similar to those found in SC, but with variations in CO and CO2 emissions. The combination of SC extraction and fast pyrolysis demonstrates promise for recovering value-added compounds from agro-industrial waste biomass while retaining a solid char for fuel and carbon management.

Fast pyrolysisHydrocharHydrothermal carbonizationMolecular beam mass spectrometry (MBMS)Primary charSecondary char

Karod M.、Goldfarb J.L.、Orton K.A.、Harman-Ware A.E.、Iisa K.、Elkasabi Y.、Mullen C.A.

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Department of Biological & Environmental Engineering Cornell University

Department of Biological & Environmental Engineering Cornell University||Smith School of Chemical & Biomolecular Engineering Cornell UniversitySmith School of Chemical & Biomolecular Engineering Cornell University||

National Renewable Energy Laboratory

USDA-Agricultural Research Service Eastern Regional Research Center

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2025

10.1016/j.jaap.2024.106868

Journal of analytical & applied pyrolysis

Journal of analytical & applied pyrolysis

ISSN：0165-2370
年,卷(期)：2025.185(Jan.)
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