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  • Use of steady state thermodynamic simulator to estimate the behaviour of the exit gas (after gasifier of the bioHPR concept) through possible cleaning devices before entering the microturbine
FP5

BIOHPR Streszczenie raportu

Project ID: ENK5-CT-2000-00311
Źródło dofinansowania: FP5-EESD
Kraj: Cyprus

Use of steady state thermodynamic simulator to estimate the behaviour of the exit gas (after gasifier of the bioHPR concept) through possible cleaning devices before entering the microturbine

Aspects of the hot gas cleaning system for large-scale applications of the bioHPR reactor concept were investigated with the aim to outline the solution of this problem rather than provide a complete solution. Product gas contaminants and their concentrations limits prior to utilisation are discussed. Data form literature along data from BioHPR prototypes are presented.

A short review of hot gas cleaning methods is presented for each contaminant category, specifically, for particles, alkalis, tars and acidic compounds. Exact thermodynamic calculations of the product gas composition and phase equilibrium are performed with proprietary process simulation software to identify the temperature window within which the cleaning should take place.

The results can be used as a guideline for designing a large-scale gas cleaning system. The investigation indicates that to achieve alkali removal (<1ppmv) through hot gas filtration the product gas has to be cooled below 600°C. To avoid tar condensation temperatures must be kept above 200°C.

Industrial gas turbine’s maximum fuel inlet temperature is set at 600°C.

Thus, to investigate appropriate sorbents to hot remove the rest of the contaminants (H2S and COS, HCl, HCN and NH3), or to directly feed the product gas to the turbine, we should operate at temperatures from 600°C down to 200°C.

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