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Alkali metal emission from filter ash and fluidized bed material from PFB gasification of biomass

Olsson, JG; Pettersson, JBC; Padban, N and Bjerle, Ingemar LU (1998) In Energy & Fuels 12(3). p.626-630
Abstract
The alkali metal emission from materials collected in a PFB biomass gasification pilot plant has been characterized. Samples of SiC filter ash and fluidized bed particles from different operating conditions were subjected to a constant heating rate up to 1000 degrees C in a nitrogen atmosphere, and the alkali metal emission was monitored continuously by a surface ionization technique. For all samples, two characteristic emission intervals are identified. In the range 100-500 degrees C, a small fraction of the alkali metal content is emitted. Above 600 degrees C, the alkali metal release increases sharply and the rise is close to exponential up to 900 degrees C. For fluidized bed particles, the alkali metal emission is significantly lower... (More)
The alkali metal emission from materials collected in a PFB biomass gasification pilot plant has been characterized. Samples of SiC filter ash and fluidized bed particles from different operating conditions were subjected to a constant heating rate up to 1000 degrees C in a nitrogen atmosphere, and the alkali metal emission was monitored continuously by a surface ionization technique. For all samples, two characteristic emission intervals are identified. In the range 100-500 degrees C, a small fraction of the alkali metal content is emitted. Above 600 degrees C, the alkali metal release increases sharply and the rise is close to exponential up to 900 degrees C. For fluidized bed particles, the alkali metal emission is significantly lower for agglomerates compared to material used during 1 day, which is attributed to the formation of less volatile compounds. For the filter ash samples, the alkali metal emission is enhanced in samples collected after longer filter cleaning intervals, indicating that the formation of a filter deposit improves the alkali capture efficiency. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Energy & Fuels
volume
12
issue
3
pages
626 - 630
publisher
The American Chemical Society
external identifiers
  • wos:000073631900027
  • scopus:0032074655
ISSN
0887-0624
DOI
10.1021/ef970211y
language
English
LU publication?
yes
id
c2770982-98b2-41b5-be3e-037209d95e41 (old id 3916686)
date added to LUP
2013-07-03 08:09:34
date last changed
2017-09-03 04:34:55
@article{c2770982-98b2-41b5-be3e-037209d95e41,
  abstract     = {The alkali metal emission from materials collected in a PFB biomass gasification pilot plant has been characterized. Samples of SiC filter ash and fluidized bed particles from different operating conditions were subjected to a constant heating rate up to 1000 degrees C in a nitrogen atmosphere, and the alkali metal emission was monitored continuously by a surface ionization technique. For all samples, two characteristic emission intervals are identified. In the range 100-500 degrees C, a small fraction of the alkali metal content is emitted. Above 600 degrees C, the alkali metal release increases sharply and the rise is close to exponential up to 900 degrees C. For fluidized bed particles, the alkali metal emission is significantly lower for agglomerates compared to material used during 1 day, which is attributed to the formation of less volatile compounds. For the filter ash samples, the alkali metal emission is enhanced in samples collected after longer filter cleaning intervals, indicating that the formation of a filter deposit improves the alkali capture efficiency.},
  author       = {Olsson, JG and Pettersson, JBC and Padban, N and Bjerle, Ingemar},
  issn         = {0887-0624},
  language     = {eng},
  number       = {3},
  pages        = {626--630},
  publisher    = {The American Chemical Society},
  series       = {Energy & Fuels},
  title        = {Alkali metal emission from filter ash and fluidized bed material from PFB gasification of biomass},
  url          = {http://dx.doi.org/10.1021/ef970211y},
  volume       = {12},
  year         = {1998},
}