Green solvents to enhance hydrochar quality and clarify effects of secondary char.

Cellulose HTC Hydrothermal carbonization Solvent extraction Thermal stability

Journal

Bioresource technology
ISSN: 1873-2976
Titre abrégé: Bioresour Technol
Pays: England
ID NLM: 9889523

Informations de publication

Date de publication:
Nov 2023
Historique:
received: 12 06 2023
revised: 14 08 2023
accepted: 05 09 2023
pubmed: 9 9 2023
medline: 9 9 2023
entrez: 8 9 2023
Statut: ppublish

Résumé

Several limitations hinder the industrial-scale implementation of hydrothermal carbonization (HTC) of biomass, especially the quality of as-carbonized hydrochar. This work investigates solvent extraction of hydrochars to enhance their potential applications. Hydrochars were produced at several HTC temperatures (190, 220, 250 °C) from cellulose and extracted using combinations of green polar solvents (ethyl acetate, acetone, and methanol). Results show that the composition of the extractable fraction resembles that of the HTC liquor, rich in carboxylic acids and furan derivatives, while the non-extractable solid phase shows improved thermal profiles devoid of highly volatile compounds. Carbon microspheres (non-dissolvable secondary char) are unaffected by extraction. The organics adsorbed on the hydrochar surface comprise highly volatile species and solvent washing effectively removes them.

Identifiants

DOI: 10.1016/j.biortech.2023.129724 PMID: 37683708
pubmed: 37683708
pii: S0960-8524(23)01152-5
doi: 10.1016/j.biortech.2023.129724
pii:
doi:

Types de publication

Journal Article

Langues

eng

Sous-ensembles de citation

IM

Pagination

129724

Informations de copyright

Copyright © 2023 The Authors. Published by Elsevier Ltd.. All rights reserved.

Déclaration de conflit d'intérêts

Declaration of Competing Interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Giulia Ischia reports financial support was provided by The US-Italy Fulbright Commission. Jillian L. Goldfarb reports financial support was provided by USDA National Institute of Food and Agriculture. Jillian L. Goldfarb reports financial support was provided by U.S. National Science Foundation. Jillian L. Goldfarb reports a relationship with Bioresource Technology that includes: board membership.

Auteurs

Giulia Ischia (G)

Department of Civil, Environmental and Mechanical Engineering, University of Trento, Via Mesiano 77, 38123 Trento, Italy; Department of Biological and Environmental Engineering, Cornell University, Ithaca, NY 14853, USA.

Jillian L Goldfarb (JL)

Department of Biological and Environmental Engineering, Cornell University, Ithaca, NY 14853, USA; Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY 14853, USA.

Antonio Miotello (A)

Department of Physics, University of Trento, Via Sommarive 14, 38123 Trento, Italy.

Luca Fiori (L)

Department of Civil, Environmental and Mechanical Engineering, University of Trento, Via Mesiano 77, 38123 Trento, Italy; Center Agriculture Food Environment (C3A), University of Trento, San Michele all'Adige, 38010 Trento, Italy. Electronic address: luca.fiori@unitn.it.

Classifications MeSH