Torrefaction of fruit waste seed and shells for biofuel production with reduced CO2 emission

Yi-Li Lin and Nai-Yun Zheng

Energy, 2021, vol. 225, issue C

Abstract: This study investigated the torrefaction of fruit waste of Mangifera indica seeds (MIse) and Passiflora edulis shells (PEsh) at different temperatures (210–300 °C) and reaction times (30 and 60 min) to produce biochar as an ecofriendly renewable energy resource. The results confirmed that the torrefaction temperature had a greater influence on the torrefied biomass than the torrefaction times. With the increase in the torrefaction temperatures and times, the H/C and O/C atomic ratios of both biochar were comparable to those of lignite. The thermal stability of PEsh was considerably higher than that of MIse. Moreover, both biochar samples exhibited an increased fuel ratio (FR = 0.02–0.17) and a high energy return on investment (EROI = 11.5–28.5). The greenhouse gas (GHG) emissions caused by the combustion of the obtained biochar were considerably lower than those caused by the combustion of coal. Cofiring 10%–20% biochar with coal yielded FRs close to that of bituminous coal and effectively mitigated GHG emissions. In sum, PEsh as a bioenergy feedstock is a feasible partial substitute for bituminous coal in power plants because of its higher fixed carbon content, energy density, FR, and EROI as well as lower GHG emissions compared to MIse.

Keywords: Torrefaction; Energy density; Thermal stability; Fuel ratio (FR); Energy return on investment (EROI); Greenhouse gas emissions (GHG) (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (8)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544221004758
Full text for ScienceDirect subscribers only

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:eee:energy:v:225:y:2021:i:c:s0360544221004758

DOI: 10.1016/j.energy.2021.120226

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().