Title:
Pyrolysis of Residual Forest Biomass in a Prototype of Auger Reactor
Author(s):
Tarelho, L.A.C., Santos, M.C., Vilas Boas, A.C.M., Hauschild, T., Silva, F.G.Cs., Guerra, D.R.S., Matos, M.A.A.
Document(s):
Paper
Slide presentation
Abstract:
In this work, the biomass pyrolysis process and the characteristics of the biochar obtained in a prototype of an auger reactor were studied. The residual biomass used in the pyrolysis process was resulting from forestry maintenance operations for wildfire prevention, and included acacia, gorse, broom, eucalyptus and pine tops. The conditions tested for the continuous process included different process temperatures (450 ºC and 550 °C) and solids residence time in the pyrolysis section (5 and 10 minutes). The residual forest biomass used was air-dried in a covered place, chipped and characterized through proximate (moisture, volatile matter, fixed carbon, ash) and ultimate analysis (CHNS). The biochar yield was determined, as well as its characteristics concerning proximate and ultimate analysis. The biochar yield was in the range 0.27 to 0.50 kg/kg biomass dry basis for the distinct biomass types, and decreased with increasing process temperature. The volatile matter in the biochar was in the range 16 to 50%wt. dry basis, the fixed carbon in the range 46 to 76%wt. dry basis, and the ash content was in the range 3 to 12%wt. dry basis. The carbon content of the biochar was in the range 66 to 82%wt. dry basis, much higher than that of raw biomass feedstocks (47.8 to 50.8 %wt. dry basis). The biochar characteristics obtained in the auger reactor were compared to that obtained in previous studies in a bench-scale batch operated reactor, and similar characteristics were found for both materials.
Keywords:
biomass, pyrolysis, biochar, auger reactors
Topic:
Biomass Conversion to Bio-Based Products and Chemicals
Subtopic:
Processes for bio-based chemicals and materials
Event:
30th European Biomass Conference and Exhibition
Session:
6AO.3.2
Pages:
993 - 1000
ISBN:
978-88-89407-22-6
Paper DOI:
10.5071/30thEUBCE2022-6AO.3.2
Price:
FREE
