Publication Details |
| Category | Text Publication |
| Reference Category | Preprints |
| DOI | 10.2139/ssrn.5336396 |
| Title (Primary) | Hydrochars from agricultural and forestry waste designed to achieve multipurpose matrices: Modeling and optimization of process parameters |
| Author | Armanu, E.G.; Secula, M.S.; Eberlein, C.
; Schmidt, M.; Heipieper, H.J.
; Volf, I. |
| Source Titel | SSRN |
| Year | 2025 |
| Department | MIBITECH; MEB |
| Language | englisch |
| Topic | T7 Bioeconomy |
| Abstract | Agricultural and forestry waste biomass constitutes sustainable
feedstock for the production of value-added products. Hydrothermal
carbonization (HTC) of vine shoots (VSs) and spruce bark (SB) biomass
was employed to produce hydrochars with tailored properties for various
applications. This paper reports a modeling and optimization approach
applied to screen and enhance the features of VSs and SB-converted
hydrochars. For this purpose, an experimental design was built
considering three independent variables: temperature ranged from 230 and
290°C, residence time, 30 up to 90 minutes, and solid-to-liquid ratio
1:5 to 1:10 g/mL. Scanning Electron Microscopy (SEM), Energy Dispersive
X-ray Spectroscopy (EDX), and WEKA-segmentation-based porosity analysis
were used to characterize the optimal features of hydrochars. HTC
processing at 260 °C, 30 min., and a 1:10 w/v ratio significantly
modified the biomass structure, producing VSs hydrochar with a
honeycomb-like porous matrix and SB hydrochar with denser, finer pores.
Quantitative analysis using the Trainable Weka segmentation plugin in
ImageJ confirmed 73 pores per 2500 μm2 (50 μm × 50 μm) with an average
size of 0.9 μm2 for VSs-HC, and 133 pores per 2500 μm2 with 0.6 μm2 for
SB-HC, correlating with their porosities and biomass compositions.
Though a temperature of 260 °C, 30 min of residence time and a w/v ratio
of 0.1 proved to be effective parameters in achieving desirable
outcomes, constrained optimization approaches may further enhance energy
efficiency and reach the aimed biomass conversion. This insight
provides a pathway for refining HTC parameters to improve the overall
sustainability and performance of hydrochar production. |
| Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=31099 |
| Armanu, E.G., Secula, M.S., Eberlein, C., Schmidt, M., Heipieper, H.J., Volf, I. (2025): Hydrochars from agricultural and forestry waste designed to achieve multipurpose matrices: Modeling and optimization of process parameters SSRN 10.2139/ssrn.5336396 |
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