Pressurized Steam Conversion of Biomass Residues for Liquid Hydrocarbons Generation

Francesco Miccio, Elettra Papa, Annalisa Natali Murri, Elena Landi and Matteo Minelli
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Francesco Miccio: Institute for Science and Technology of Ceramics CNR, via Granarolo 64, 48018 Faenza, Italy
Elettra Papa: Institute for Science and Technology of Ceramics CNR, via Granarolo 64, 48018 Faenza, Italy
Annalisa Natali Murri: Institute for Science and Technology of Ceramics CNR, via Granarolo 64, 48018 Faenza, Italy
Elena Landi: Institute for Science and Technology of Ceramics CNR, via Granarolo 64, 48018 Faenza, Italy
Matteo Minelli: Department of Civil, Chemical, Environmental and Materials Engineering (DICAM), Alma Mater Studiorum, University of Bologna, via Terracini 28, 40131 Bologna, Italy

Energies, 2021, vol. 14, issue 4, 1-12

Abstract: Biomass residues are often considered as a resource if conveniently converted in fuel and alternative feedstock for chemical processes, and their conversion into valuable products may occur by different pathways. This work is focused on the thermochemical conversion at moderate temperature and in steam atmosphere, a mild process in comparison to hydrothermal liquefaction, followed by extraction of soluble products in a solvent. Such process has been already applied to various residues and here extended to the case of marc, the residual pomace from wine making, largely produced worldwide. A pressurized batch reactor was used for the quantitative determination of produced solid and liquid fractions, and their qualitative characterization was performed by instrumental analyses. The pressurized steam conversion of marc was effective, providing a yield in liquid fraction, upon extraction in solvent, up to 30% of the raw dried biomass. The use of polar and nonpolar solvent for the extraction of the liquid fraction was inspected. Applied operating conditions, namely residence time in the batch reactor and extraction modality, showed a significant influence on the process performance. In particular, long residence and extraction times and use of nonpolar solvent substantially improved the yield in liquid fraction.

Keywords: pyrolysis; liquefaction; bio-oils; biomass; grape residue; steam (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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