Characterization of different wood species as potential feedstocks for gasification
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Kuupäev
2021
Kättesaadav alates
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
This paper provides an extended overview of the chemical characteristics of 19
different wood species originating from Estonia. The variation of chemical composition in wood
and bark was investigated using a variety of analytical techniques including WD-XRF, ICP-MS,
and elemental analysis. Principal component analysis (PCA) was used to observe clustering in
the sample set. It revealed a clear data clustering in terms of the wood and bark samples. Wood
characteristics exhibit quite narrow ranges, on the other hand the composition of wood bark
samples is significantly different and more distributed. The correlations and associations among
27 chemical parameters, including 16 ash-forming elements, were studied. Several significant
positive correlations between Cr-Ni-Fe, Ca-Sr, Al-Na-Si-Ti, K-Mg-P, Fe-Zn-Cr-Ni-Cu, Ash-Ca,
N-S-P and O-volatile matter were found. Most of the metallic components are negatively
correlated with volatile matter, C, H, O and heating value and are positively related to each other,
or no significant correlation was identified. Results are compared to literature data and technical
quality standards for biomass. Biomass feedstocks availability and composition for gasification
process was discussed. Wood samples had higher volatiles content than in bark which is an
indication that higher conversion rate and lower gasification temperature can be used. Spruce,
pine and black alder barks have higher fixed carbon content than other common species that may
increase biochar yield. Commonly available woods like Scots pine, Norway spruce, aspen, birch,
black alder and grey alder may considered as suitable feedstocks for gasification because of their
low N, S, Cl, and ash content together with high volatile matter, however, relatively high total
heavy metals content were found from birch and grey alder barks compared to other hardwoods.
Kirjeldus
Received: August 26th, 2020 ; Accepted: January 12th, 2021 ; Published: January 18th, 2021 ; Correspondence: mari.sulg@taltech.ee
Märksõnad
biomass, biomass ash, chemical composition, articles