Effect of torrefaction pretreatment on the combustion characteristics of the biodried products derived from municipal organic wastes

Jiao Ma, Shuo Feng, Zhikun Zhang, Zhuozhi Wang, Wenwen Kong, Peng Yuan, Boxiong Shen and Lan Mu

Energy, 2022, vol. 239, issue PD

Abstract: Derived from bio-drying of municipal organic wastes (MOWs), biodried products (BPs) are normally accepted as carbon-neutral and renewable energy sources. In this study, torrefaction at different temperatures was conducted for BPs to upgrade their properties as fuels. The results indicated that high temperatures promoted formation of gases and liquids during BPs torrefaction. Among the gaseous products, the CO2 content was significantly higher than those of CO and H2. In the liquid products, including H2O, benzenes and phenols were two typical components, which coincided with organics devolatilization and lignocellulose depolymerization. Furthermore, the fuel properties of torrefied BPs were upgraded with higher fixed carbon contents (21.95%–29.25%) and heating values (15.15–17.98 MJ/kg) due to the elimination of oxygen-containing volatiles. During combustion of torrefied BPs, the devolatilization of organics was diminished, but the decomposition of lignocellulose was enhanced. Moreover, torrefaction promoted the char combustion with lower activation energy values (151.69–207.76 vs. 160.20–215.56 kJ/mol). In addition, torrefaction reduced the emissions of CO/C–O compounds and enhanced the release of CO2, CO and H2O during combustion. However, severe torrefaction decreased energy yields and the potentials of BPs for energy recovery as fuels. Moderate torrefaction (approximately 250 °C) was suggested to be more beneficial for upgrading BPs.

Keywords: Biodried product; Combustion kinetic; Lignocellulose; Organic waste; Torrefaction (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544221026074
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:239:y:2022:i:pd:s0360544221026074

DOI: 10.1016/j.energy.2021.122358

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 ().