Solid Fuel Characteristics of Pellets Comprising Spent Coffee Grounds and Wood Powder

Duk-Gam Woo, Sang Hyeon Kim and Tae Han Kim
Additional contact information
Duk-Gam Woo: Research Faculty of Agriculture, Hokkaido University, Sapporo 060-0808, Japan
Sang Hyeon Kim: Department of Bio-industrial Machinery Engineering, Kyungpook National University, Daegu 41566, Korea
Tae Han Kim: Department of Bio-industrial Machinery Engineering, Kyungpook National University, Daegu 41566, Korea

Energies, 2021, vol. 14, issue 2, 1-17

Abstract: To help mitigate the effects of global warming and fossil fuel depletion caused by human use of fossil fuels, solid fuel pellets were developed from a mixture of spent coffee grounds (SCG) and pine sawdust (PS). The feasibility of SCG-PS pellets as biofuel was also verified by evaluating its fuel quality. An increase in the proportion of SCG in the pellet led to an increase in its calorific value, owing to the high C, H, and oil contents, and increases in the ash and S contents, owing to the high S content in SCG. Analysis of the feedstock particle size distribution revealed that SCG particles are smaller than PS particles; thus, the durability of the pellet decreases as the proportion of SCG increases. Accordingly, the samples with higher SCG proportions (70 and 90 wt.%) did not meet the moisture content standards for biomass solid refuse fuel (bio-SRF) set by the Korea Ministry of Environment, whereas the samples with lower SCG proportions did. In particular, CP10 (10 wt.% SCG + 90 wt.% PS) satisfied the quality standards of Grade 1 wood pellets, demonstrating the feasibility of using SCG as a raw material for biofuel pellet production.

Keywords: spent coffee grounds; pellet; bio solid refuse fuel; fuel characteristics; solid fuel quality standards (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
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

Downloads: (external link)
https://www.mdpi.com/1996-1073/14/2/371/pdf (application/pdf)
https://www.mdpi.com/1996-1073/14/2/371/ (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:jeners:v:14:y:2021:i:2:p:371-:d:478554

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

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