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Title:
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Coal/biomass cogasification and high temperature gas cleaning
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Author(s):
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Published by:
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Publication date:
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ECN
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1995
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ECN report number:
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Document type:
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ECN-RX--95-029
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Other
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Number of pages:
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Full text:
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33
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Download PDF
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Abstract:
This paper reports on the cogasification of coal and biomass in adowndraught fixed-bed gasifier and on the high temperature removal of halides
from the fuel gas produced. Air-blown downdraught gasifiers are considered as
an interesting option especially for small and intermediate scale on-site
fuel gas generation using high volatile feedstocks. The current test
programme conducted with a 300 kWth downdraught gasifier at the Netherlands
Energy Research Foundation (ECN) was focused on the effect of the partial
replacement of the coal feedstock by two different biomass feedstocks, viz.
Meranti wood waste and straw pellets (Danish winter wheat), on gasifier
operability and fuel gas composition. For dry halide removal, several
sorbents were evaluated based on literature data, thermodynamic calculations,
and on laboratory and bench-scale experiments at atmospheric pressure. The
evaluation was mainly focused on dry halide removal at a temperature level of
350-400C in a separate process located upstream of the desulphurisation
process in an integrated system for high temperature gas cleaning. 8 figs.,
11 tabs., 11 refs.
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