Abstract
In this paper, six fuel samples have been studied:
- Original spruce bark
- Torrefied spruce bark
- Pre-washed spruce bark followed by torrefaction
- Original wheat straw
- Torrefied wheat straw
- Pre-washed wheat straw followed by torrefaction
The fuels have been chemically fractionated by treating them consecutively with three different solvents (H2O, ammonium acetate, 1 M HCl). The solubilities of the elements were determined showing that the pre-treatments did not significantly change the expected behaviour of the ash-forming elements.
The fuel qualities were improved mainly due to lower chlorine contents. In the case of bark, torrefaction was enough to improve the quality while in the case with wheat straw also the pre-washing step was needed.
| Original language | English |
|---|---|
| Title of host publication | Proceeding of the 23rd International Conference on Fluidized Bed Conversion |
| Publisher | Korean Institute of Chemical Engineers |
| Pages | 1135-1143 |
| ISBN (Electronic) | 978-89-950005-7-1 |
| Publication status | Published - 2018 |
| MoE publication type | A4 Article in a conference publication |
| Event | 23rd International Conference on Fluidized Bed Conversion - Seoul, Korea, Republic of Duration: 13 May 2018 → 17 May 2018 |
Conference
| Conference | 23rd International Conference on Fluidized Bed Conversion |
|---|---|
| Country | Korea, Republic of |
| City | Seoul |
| Period | 13/05/18 → 17/05/18 |
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Keywords
- biomass fuels, torrefaction, chemical fractionation, elemental ratios, ash behaviour
Cite this
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Influence of fuel pre-treatments on ash-forming elements and implications on corrosion. / Leino, Timo; Yrjas, Patrik (Corresponding author); Carbo, Michiel; Abelha, Pedro; Hupa, Leena; Janssen, Arno.
Proceeding of the 23rd International Conference on Fluidized Bed Conversion. Korean Institute of Chemical Engineers, 2018. p. 1135-1143.Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review
TY - GEN
T1 - Influence of fuel pre-treatments on ash-forming elements and implications on corrosion
AU - Leino, Timo
AU - Yrjas, Patrik
AU - Carbo, Michiel
AU - Abelha, Pedro
AU - Hupa, Leena
AU - Janssen, Arno
PY - 2018
Y1 - 2018
N2 - The demand for increased use of CO2-neutral biomass fuels has led to an increased use of difficult fuels such as straw, agrofuels, and biomass waste streams. However, these types of fuels have resulted in limited steam temperatures in power boilers and thus limited efficiencies. To challenge these limitations one alternative is to pre-treat fuels in such a way that the harmful elements either is removed from the fuels or stabilized so they are not able to form corrosive compounds. Torrefaction, steam explosion and hydrothermal processes are examples of fuel up-grading treatments.In this paper, six fuel samples have been studied:- Original spruce bark- Torrefied spruce bark- Pre-washed spruce bark followed by torrefaction- Original wheat straw- Torrefied wheat straw- Pre-washed wheat straw followed by torrefactionThe fuels have been chemically fractionated by treating them consecutively with three different solvents (H2O, ammonium acetate, 1 M HCl). The solubilities of the elements were determined showing that the pre-treatments did not significantly change the expected behaviour of the ash-forming elements.The fuel qualities were improved mainly due to lower chlorine contents. In the case of bark, torrefaction was enough to improve the quality while in the case with wheat straw also the pre-washing step was needed.
AB - The demand for increased use of CO2-neutral biomass fuels has led to an increased use of difficult fuels such as straw, agrofuels, and biomass waste streams. However, these types of fuels have resulted in limited steam temperatures in power boilers and thus limited efficiencies. To challenge these limitations one alternative is to pre-treat fuels in such a way that the harmful elements either is removed from the fuels or stabilized so they are not able to form corrosive compounds. Torrefaction, steam explosion and hydrothermal processes are examples of fuel up-grading treatments.In this paper, six fuel samples have been studied:- Original spruce bark- Torrefied spruce bark- Pre-washed spruce bark followed by torrefaction- Original wheat straw- Torrefied wheat straw- Pre-washed wheat straw followed by torrefactionThe fuels have been chemically fractionated by treating them consecutively with three different solvents (H2O, ammonium acetate, 1 M HCl). The solubilities of the elements were determined showing that the pre-treatments did not significantly change the expected behaviour of the ash-forming elements.The fuel qualities were improved mainly due to lower chlorine contents. In the case of bark, torrefaction was enough to improve the quality while in the case with wheat straw also the pre-washing step was needed.
KW - biomass fuels, torrefaction, chemical fractionation, elemental ratios, ash behaviour
M3 - Conference article in proceedings
SP - 1135
EP - 1143
BT - Proceeding of the 23rd International Conference on Fluidized Bed Conversion
PB - Korean Institute of Chemical Engineers
ER -