Valorization of organic municipal solid waste to enhanced solid biofuel: torrefaction kinetics, torrefied solid fuel performance, and fuel properties
Document Type
Article
Publication Date
12-31-2024
Abstract
The kinetics of the torrefaction process have been studied in various reactors. However, no study reported the torrefaction kinetics of organic municipal solid waste (OMSW) in a helical screw rotation-induced (HSRI) fluidized bed reactor. This study produced torrefied solid fuel, and the kinetic parameters of the OMSW torrefaction process were determined. The results showed that increasing temperature and residence time from 200 to 300 degrees C and 0 to 40 minutes increased mass loss, calorific value, ash content, fixed carbon, energy density, and carbon content. Conversely, mass yield, volatile matter, energy yields, oxygen-to-carbon, and hydrogen-to-carbon ratios decreased. The calorific value experienced notable growth, varying from 17.80 to 26.18 MJ/kg, with increased residence time and temperature. The one-step kinetic model using a first-order reaction accurately predicts reaction data for long residence times with a maximum error of 2.42% at 300 degrees C and 10 minutes and is useful for designing and scaling up the HSRI fluidized bed reactor within the temperature and mass loss ranges of 220-300 degrees C and 2.61-47.38%. The OMSW torrefaction frequency factor and activation energy were 0.2036 s(-1) and 24.46 kJ/mol, respectively. The findings of this study showed that residence time has less effect on the torrefaction process than temperature.
Keywords
Torrefaction, Helical screw rotation-induced fluidized bed reactor, Calorific value, Kinetic parameters, Torrefied solid fuel, One-step kinetic model
Divisions
sch_che
Funders
Petroleum Technology Development Fund [Grant No: IIRG003A-2020FNW],Universiti Malaya,Petroleum Technology Development Fund (PTDF)
Publication Title
Energy Sources Part A-Recovery Utilization and Environmental Effects
Volume
46
Issue
1
Publisher
Taylor & Francis Inc
Publisher Location
530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA