Abstract
Fluidized-bed air gasification of Finnish pine saw dust was studied in the PDU-scale test facilities of VTT to support the development of simplified integrated gasification combined-cycle processes by providing new information on the formation and behaviour of different gas impurities in wood gasification. The gasifier was operated at 4-5 bar pressure and at 880-1 020 deg C Product gas was cleaned by ceramic candle filters operated at 490-715 deg C. Concentrations of tars, fixed nitrogen species and vapour-phase alkali metals were determined in different operating conditions. Carbon conversion exceeded 95 deg C in all test periods although the gasifier was operated without recycling the cyclone or filter fines back to the reactor. However, at the gasification temperature of 880-900 deg C more than 5 deg C of the wood carbon was converted to tars. The total concentration of tars (compounds heavier than benzene) was reduced from 6 000 to 3 000 mg/m{sup 3}n by increasing the gasification temperature from 880 deg C to 1 000 deg C. The expected catalytic effects of calcium on tar decomposition could not be achieved in these experiments by feeding coarse dolomite into the bed. The use of sand or aluminium oxide as an inert
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Kurkela, E;
Staahlberg, P;
Laatikainen, J
[1]
- Technical Research Centre of Finland, Espoo (Finland). Lab. of Fuel and Process Technology
Citation Formats
Kurkela, E, Staahlberg, P, and Laatikainen, J.
Pressured fluidized-bed gasification experiments with wood, peat and coal at VTT in 1991-1992. Test facilities and gasification experiments with sawdust.
Finland: N. p.,
1993.
Web.
Kurkela, E, Staahlberg, P, & Laatikainen, J.
Pressured fluidized-bed gasification experiments with wood, peat and coal at VTT in 1991-1992. Test facilities and gasification experiments with sawdust.
Finland.
Kurkela, E, Staahlberg, P, and Laatikainen, J.
1993.
"Pressured fluidized-bed gasification experiments with wood, peat and coal at VTT in 1991-1992. Test facilities and gasification experiments with sawdust."
Finland.
@misc{etde_10187298,
title = {Pressured fluidized-bed gasification experiments with wood, peat and coal at VTT in 1991-1992. Test facilities and gasification experiments with sawdust}
author = {Kurkela, E, Staahlberg, P, and Laatikainen, J}
abstractNote = {Fluidized-bed air gasification of Finnish pine saw dust was studied in the PDU-scale test facilities of VTT to support the development of simplified integrated gasification combined-cycle processes by providing new information on the formation and behaviour of different gas impurities in wood gasification. The gasifier was operated at 4-5 bar pressure and at 880-1 020 deg C Product gas was cleaned by ceramic candle filters operated at 490-715 deg C. Concentrations of tars, fixed nitrogen species and vapour-phase alkali metals were determined in different operating conditions. Carbon conversion exceeded 95 deg C in all test periods although the gasifier was operated without recycling the cyclone or filter fines back to the reactor. However, at the gasification temperature of 880-900 deg C more than 5 deg C of the wood carbon was converted to tars. The total concentration of tars (compounds heavier than benzene) was reduced from 6 000 to 3 000 mg/m{sup 3}n by increasing the gasification temperature from 880 deg C to 1 000 deg C. The expected catalytic effects of calcium on tar decomposition could not be achieved in these experiments by feeding coarse dolomite into the bed. The use of sand or aluminium oxide as an inert bed material did neither lead to any decrease in tar concentrations. However, the tar concentrations were dramatically reduced in the cogasification experiments, when a mixture of approximately 50 deg C/50 deg C wood and coal was used as the feed stock. Wood nitrogen was mainly converted into ammonia, while the concentrations of HCN and organic nitrogen containing compounds were very low}
place = {Finland}
year = {1993}
month = {Dec}
}
title = {Pressured fluidized-bed gasification experiments with wood, peat and coal at VTT in 1991-1992. Test facilities and gasification experiments with sawdust}
author = {Kurkela, E, Staahlberg, P, and Laatikainen, J}
abstractNote = {Fluidized-bed air gasification of Finnish pine saw dust was studied in the PDU-scale test facilities of VTT to support the development of simplified integrated gasification combined-cycle processes by providing new information on the formation and behaviour of different gas impurities in wood gasification. The gasifier was operated at 4-5 bar pressure and at 880-1 020 deg C Product gas was cleaned by ceramic candle filters operated at 490-715 deg C. Concentrations of tars, fixed nitrogen species and vapour-phase alkali metals were determined in different operating conditions. Carbon conversion exceeded 95 deg C in all test periods although the gasifier was operated without recycling the cyclone or filter fines back to the reactor. However, at the gasification temperature of 880-900 deg C more than 5 deg C of the wood carbon was converted to tars. The total concentration of tars (compounds heavier than benzene) was reduced from 6 000 to 3 000 mg/m{sup 3}n by increasing the gasification temperature from 880 deg C to 1 000 deg C. The expected catalytic effects of calcium on tar decomposition could not be achieved in these experiments by feeding coarse dolomite into the bed. The use of sand or aluminium oxide as an inert bed material did neither lead to any decrease in tar concentrations. However, the tar concentrations were dramatically reduced in the cogasification experiments, when a mixture of approximately 50 deg C/50 deg C wood and coal was used as the feed stock. Wood nitrogen was mainly converted into ammonia, while the concentrations of HCN and organic nitrogen containing compounds were very low}
place = {Finland}
year = {1993}
month = {Dec}
}