Title:
Biochar Production from Pyrolysis of Residual Forest Biomass: Comparison of Biochar Properties from Bench-scale Batch Reactor and Pilot-scale Auger Reactor
Author(s):
Santos, M.C., Tarelho, L.A.C., Marques, C.C., Silva, F.G.C.S., Matos, M.A.A.
Document(s):
Paper
Poster
Abstract:
The properties of biochar produced using a bench-scale batch reactor (BR), an electrically heated auger reactor (EAR), and an integrated autothermal auger reactor (AAR) were studied. The studies used residual forest biomass, comparing the acacia, broom, gorse and giant reed results. Pyrolysis in the BR was performed with a heating rate of 20 °C·min-1, temperature of 550 °C, residence time of 30 min, and a biomass capacity of 40 g. In the EAR, a temperature of 550 °C, solids residence time of 5 min, and biomass feedstock capacity of 1 kg·h-1 were used. For the AAR, pyrolysis was conducted at temperatures up to 1100 ºC, solids residence time of 18 min, and biomass processing capacity of up to 10 kg·h-1. Biochar yield ranged from 0.19 to 0.31 kg·kg-1 biomass dry basis, similar for BR and EAR, and lower when the process was performed in AAR. Volatile matter in the biochar ranged from 0.06 to 0.19 kg·kg-1 biochar dry basis, fixed carbon ranged from 0.75 to 0.91 kg·kg-1 biochar dry basis, and ash content ranged from 0.03 to 0.12 kg·kg-1 biochar dry basis. The higher heating value of the biochar ranged from 27.8 to 32.6 MJ·kg-1 for EAR and AAR. The results showed that the biochar obtained exhibited increased heating value, fixed carbon and ash content, and decreased in volatile matter compared to the raw biomass. The reactors allowed for the biochar production with satisfactory characteristics for various applications, and the biochar is influenced by the type of biomass, process conditions and reactor type.
Keywords:
biomass, pyrolysis, biochar
Topic:
Biomass Conversion to Bio-based Products and Chemicals
Subtopic:
Processes for bio-based chemicals and materials
Event:
32nd European Biomass Conference and Exhibition
Session:
6BV.2.8
Pages:
813 - 820
ISBN:
978-88-89407-24-0
Paper DOI:
10.5071/32ndEUBCE2024-6BV.2.8
Price:
FREE
