Study of the Potential Uses of Hydrochar from Grape Pomace and Walnut Shells Generated from Hydrothermal Carbonization as an Alternative for the Revalorization of Agri-Waste in Chile

René A. Garrido, Camila Lagos, Carolina Luna, Jaime Sánchez and Georgina Díaz
Additional contact information
René A. Garrido: Geographical Engineering Department, Universidad de Santiago de Chile, Santiago 9170022, Chile
Camila Lagos: Geographical Engineering Department, Universidad de Santiago de Chile, Santiago 9170022, Chile
Carolina Luna: Chemical Engineering Department, Universidad de Santiago de Chile, Santiago 9170022, Chile
Jaime Sánchez: Geographical Engineering Department, Universidad de Santiago de Chile, Santiago 9170022, Chile
Georgina Díaz: Chemical Engineering Department, Universidad de Santiago de Chile, Santiago 9170022, Chile

Sustainability, 2021, vol. 13, issue 22, 1-10

Abstract: A myriad of resources and efforts have been devoted to assessing the possibilities of using locally sourced biomass to produce energy, reduce CO 2 emissions, and, in turn, lower dependance on petroleum. Grape pomace (GP) and walnut shells (WS) are organic waste generated in Chile. Within the last decade, the potential benefits and application of biomass have received significant attention, both in terms of producing functionalized carbon materials, and the various potential applications in the field of energy storage and environmental protection. The proposed research motivation is on the development of carbonous materials through thermal decomposition processes. Few researchers have addressed the idea of developing a multipurpose carbonaceous matrix from hydrochar, and there remains a need for an efficient method to obtain hydrochar specially from grape pomace. Hence, the general objective of this research is to study the potential of grape pomace and walnut shells treated with hydrothermal carbonization (HTC) as an alternative low-cost and efficient carbonous matrix. Proximate and elemental analysis was determined to distinguish the nature of the feedstock along with the hydrochar produced. Yield and reaction severity were also studied to study the impacts of temperature and residence time for both feedstocks. Successful results from the proposed work have broad applications for increasing the sustainability biomass applications, contributing to a positive economic impact.

Keywords: grape pomace; walnut shells; hydrothermal carbonization (HTC); thermogravimetric analysis (TGA); hydrochar (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.mdpi.com/2071-1050/13/22/12600/pdf (application/pdf)
https://www.mdpi.com/2071-1050/13/22/12600/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:13:y:2021:i:22:p:12600-:d:679646

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().