Characteristics of distinct ash flows in a biomass thermal power plant with bubbling fluidised bed combustor
authors Tarelho, LAC; Teixeira, ER; Silva, DFR; Modolo, RCE; Labrincha, JA; Rocha, F
nationality International
journal ENERGY
author keywords Fluidised bed; Combustion; Biomass; Ash
keywords CHEMICAL-COMPOSITION; BOTTOM ASH; WASTE; IMPACT; COCOMBUSTION; CONVERSION; RESIDUES; BEHAVIOR; QUALITY; BOILER
abstract Characteristics of biomass used as fuel and distinct ash flows in a thermal power plant with BFBC (bubbling fluidised bed combustion) technology were studied. An integrated approach involving chemical composition, microscopy analysis, mineralogy, and thermal behaviour were used to characterize the ash. The ashes have a low unburned content, typically below 3 wt.% (dry basis), with higher values in ash from the electrostatic precipitator. The chemical element present in higher concentration in the several ash flows is Si (>20 wt.%, dry basis). The fly ash from the electrostatic precipitator are enriched in heavy metals when compared to other ash, and Zn is the heavy metal found in higher concentration (but <225 ppm wt., dry basis), followed by Cr, Pb, Cu and Ni in decreasing order of abundance. The distinct ash produce leaching solutions with pH values in range 11.9-12.8, and conductivity in the range 4.7-19.5 mS/cm, with higher values in ash from electrostatic precipitator. Ca is the element in higher concentration in the ash leachates, followed by K, Na and Cl. The concentration of heavy metals in the leachates is relatively low. The biomass quality influences the ash characteristics, and an appropriate management of biomass and ash is need to improve the performance of thermal power plants. (C) 2015 Elsevier Ltd. All rights reserved.
publisher PERGAMON-ELSEVIER SCIENCE LTD
issn 0360-5442
year published 2015
volume 90
beginning page 387
ending page 402
digital object identifier (doi) 10.1016/j.energy.2015.07.036
web of science category Thermodynamics; Energy & Fuels
subject category Thermodynamics; Energy & Fuels
unique article identifier WOS:000364248100036
  ciceco authors
  impact metrics
journal analysis (jcr 2017):
journal impact factor 4.968
5 year journal impact factor 5.582
category normalized journal impact factor percentile 88.013
dimensions (citation analysis):
altmetrics (social interaction):



 


Sponsors

1suponsers_list_ciceco.jpg