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Process evaluation of mild hydrothermal carbonization to convert wet biomass residue streams into intermediate bioenergy carriers

delete2024-02-01
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S
S R Shah
J
J.W. Dijkstra
H
Heather E. Wray *
DOI:10.1016/j.biombioe.2023.107036delete
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Abstract

Abstract

En 中文
Hydrothermal carbonization (HTC) is a promising process for the upgrading of wet biomass residues. Models of HTC processes, in particular at continuous pilot-scale, are needed to move HTC from lab-scale to industrial scale. This study presents a process model for mild HTC, dewatering and conversion to intermediate energy carriers (bio-pellets and biogas for power and/or heat production) of three wet biomass residue streams: paper sludge, olive pomace and orange peels, based on lab- and pilot-scale experiments. In addition, the process energy efficiency and feedstock utilization of the HTC process is calculated and compared with conventional treatment options for the chosen residues, i.e., direct anaerobic digestion (olive pomace, orange peels) or combustion after conventional dewatering (paper sludge). The process model indicates that the HTC pilot-scale process is much more efficient in terms of feedstock utilization to produce heat and/or power than the reference scenarios. The process energy efficiency of the HTC process (pilot-scale) was calculated to be 26 %, 63 % and 40 % for paper sludge, olive pomace and orange peel feedstocks, respectively. For all feedstocks, both the solid and liquidgenerated products are equally important for improving the overall process energy efficiency. This study demonstrates the potential benefits of HTC processes for upgrading wet biomass waste streams based on continuous pilot-scale data.
Keywords:
Hydrothermal carbonization
Torwash
Conceptual process design
Process modelling
Paper sludge
Olive pomace
Orange peels
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Journal

Biomass and Bioenergy cover
Biomass and Bioenergy
IF:
5.8
Papers:
8.4K
Citations:
2.2W

Organization

N
Netherlands Organization Applied Science Research
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Citations: 3