Title:
New Indexes for the Contamination of Wood Chips with Mineral Soil
Author(s):
Dietz, E., Kuptz, D., Blum, U., Schulmeyer, F., Borchert, H., Hartmann, H.
Document(s):
Paper
Poster
Abstract:
Critical elements such as chloride (Cl), potassium (K), silicon (Si) or heavy metals might determine high temperature corrosion, emission behavior and slagging of solid biofuels during combustion. Using the fact that plant material contains distinctly less iron (Fe) than mineral soils and vice versa manganese (Mn) in plant tissue is significant higher than in soil material and that the Al-content of plant biomass is limited, indexes could be created to classify wood chips into "contaminated with soil" and uncontaminated "biomass" by building ratios of Fe/Mn and Al/200 Thus, "biomass fuel indexes for the contamination with mineral soil" (BFICS) were developed. Plausibility checks were carried out, using tree biomass of various species und soil datasets from other research projects. They showed that for Pinus sylvestris an adapted Al-index is necessary. 2.7 % of the tree samples, Pinus sylvestris excluded, exceed the threshold value of 1 for the Fe/Mn-index and only 3.3 % exceed 1 for Al/200. The newly developed BFICS are useful to determine the source of critical elements for combustion, for aerosol formation, to detect high shares of non-combustible material and to prove the effectivity of pre-treatments like screening.
Keywords:
wood chip quality, chemical elements, fuel contamination indexes
Topic:
Biomass Conversion Technologies for Heating, Cooling and Electricity
Subtopic:
Production and supply of solid biofuels
Event:
24th European Biomass Conference and Exhibition
Session:
2BV.1.4
Pages:
630 - 633
ISBN:
978-88-89407-165
Paper DOI:
10.5071/24thEUBCE2016-2BV.1.4
Price:
FREE
