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Influence from fuel type on the performance of an air-blown cyclone gasifier

Risberg, M; Öhrman, O.G.W.; Gebart, B.R.; Nilsson, Patrik LU ; Gudmundsson, Anders LU and Sanati, Mehri LU (2014) In Fuel 116. p.751-759
Abstract
Entrained flow gasification of biomass using the cyclone principle has been proposed in combination with a gas engine as a method for combined heat and power production in small to medium scale (<20 MW).

This type of gasifier also has the potential to operate using ash rich fuels since the reactor temperature is lower than the ash melting temperature and the ash can be separated after being collected at the bottom of the cyclone. The purpose of this work was to assess the fuel flexibility of cyclone gasification by performing tests with five different types of fuels; torrefied spruce, peat, rice husk, bark and wood. All of the fuels were dried to below 15% moisture content and milled to a powder with a maximum particle size of... (More)
Entrained flow gasification of biomass using the cyclone principle has been proposed in combination with a gas engine as a method for combined heat and power production in small to medium scale (<20 MW).

This type of gasifier also has the potential to operate using ash rich fuels since the reactor temperature is lower than the ash melting temperature and the ash can be separated after being collected at the bottom of the cyclone. The purpose of this work was to assess the fuel flexibility of cyclone gasification by performing tests with five different types of fuels; torrefied spruce, peat, rice husk, bark and wood. All of the fuels were dried to below 15% moisture content and milled to a powder with a maximum particle size of around 1 mm. The experiments were carried out in a 500 kWth pilot gasifier with a 3-step gas cleaning process consisting of a multi-cyclone for removal of coarse particles, a bio-scrubber for tar removal and a wet electrostatic precipitator for removal of fine particles and droplets from the oil scrubber (aerosols). The lower heating value (LHV) of the clean producer gas was 4.09, 4.54, 4.84 and 4.57 MJ/Nm3 for

peat, rice husk, bark and wood, respectively, at a fuel load of 400 kW and an equivalence ratio of 0.27. Torrefied fuel was gasified at an equivalence ratio of 0.2 which resulted in a LHV of 5.75 MJ/Nm3 which

can be compared to 5.50 MJ/Nm3 for wood powder that was gasified at the same equivalence ratio. A particle sampling system was designed in order to collect ultrafine particles upstream and downstream

the gasifier cleaning device. The results revealed that the gas cleaning successfully removed >99.9% of the particulate matter smaller than 1 lm. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Cyclone gasification, Biomass, Scrubber Electrostatic precipitator, Multi-cyclone
in
Fuel
volume
116
pages
751 - 759
publisher
Elsevier
external identifiers
  • wos:000326943400095
  • scopus:84884801889
ISSN
1873-7153
DOI
10.1016/j.fuel.2013.08.008
language
English
LU publication?
yes
id
7e6898d7-80bf-41a8-856c-77ca7526c221 (old id 4275781)
date added to LUP
2014-01-28 16:25:00
date last changed
2017-07-02 03:11:32
@article{7e6898d7-80bf-41a8-856c-77ca7526c221,
  abstract     = {Entrained flow gasification of biomass using the cyclone principle has been proposed in combination with a gas engine as a method for combined heat and power production in small to medium scale (&lt;20 MW).<br/><br>
This type of gasifier also has the potential to operate using ash rich fuels since the reactor temperature is lower than the ash melting temperature and the ash can be separated after being collected at the bottom of the cyclone. The purpose of this work was to assess the fuel flexibility of cyclone gasification by performing tests with five different types of fuels; torrefied spruce, peat, rice husk, bark and wood. All of the fuels were dried to below 15% moisture content and milled to a powder with a maximum particle size of around 1 mm. The experiments were carried out in a 500 kWth pilot gasifier with a 3-step gas cleaning process consisting of a multi-cyclone for removal of coarse particles, a bio-scrubber for tar removal and a wet electrostatic precipitator for removal of fine particles and droplets from the oil scrubber (aerosols). The lower heating value (LHV) of the clean producer gas was 4.09, 4.54, 4.84 and 4.57 MJ/Nm3 for<br/><br>
peat, rice husk, bark and wood, respectively, at a fuel load of 400 kW and an equivalence ratio of 0.27. Torrefied fuel was gasified at an equivalence ratio of 0.2 which resulted in a LHV of 5.75 MJ/Nm3 which<br/><br>
can be compared to 5.50 MJ/Nm3 for wood powder that was gasified at the same equivalence ratio. A particle sampling system was designed in order to collect ultrafine particles upstream and downstream<br/><br>
the gasifier cleaning device. The results revealed that the gas cleaning successfully removed &gt;99.9% of the particulate matter smaller than 1 lm.},
  author       = {Risberg, M and Öhrman, O.G.W. and Gebart, B.R. and Nilsson, Patrik and Gudmundsson, Anders and Sanati, Mehri},
  issn         = {1873-7153},
  keyword      = {Cyclone gasification,Biomass,Scrubber Electrostatic precipitator,Multi-cyclone},
  language     = {eng},
  pages        = {751--759},
  publisher    = {Elsevier},
  series       = {Fuel},
  title        = {Influence from fuel type on the performance of an air-blown cyclone gasifier},
  url          = {http://dx.doi.org/10.1016/j.fuel.2013.08.008},
  volume       = {116},
  year         = {2014},
}