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Bioresour Technol. 2017 Nov;244(Pt 1):281-288. doi: 10.1016/j.biortech.2017.07.097. Epub 2017 Jul 20.

Effects of temperature and particle size on biomass torrefaction in a slot-rectangular spouted bed reactor.

Author information

1
Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC V6T 1Z4, Canada. Electronic address: zwang@chbe.ubc.ca.
2
Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC V6T 1Z4, Canada.
3
Institute of Biological and Environmental Engineering, Hunan Academy of Forestry, Changsha 410004, PR China.
4
Department of Chemical Engineering, Federal University of Technology - Parana, Monteiro Lobato Avenue, km 04, Ponta Grossa, PR 84016-210, Brazil.

Abstract

Sawdust particles of different sizes (0.25-0.5, 0.5-1.0 and 1.0-2.0mm) were torrefied in a continuous slot-rectangular spouted bed reactor. The effects of particle size and temperature were investigated on the properties of the torrefied product, such as proximate analysis, ultimate analysis, HHV, skeletal density, and energy yield. Temperature was the most important variable in the torrefaction process. Increasing the particle size led to more weight loss of sawdust and increased mass of the torrefied product remaining in the reactor. The ash content evolution of the torrefied product showed that its properties approached a steady state within 20min. The reduction in Sauter mean particles size was up to 20.3% and 28.2% for 0.25-0.5mm and 0.5-1.0mm sawdust, respectively.

KEYWORDS:

Biomass torrefaction; Continuous operation; Product properties; Slot-rectangular spouted bed reactor

PMID:
28780261
DOI:
10.1016/j.biortech.2017.07.097
[Indexed for MEDLINE]

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