Nitrogen-Free Co-Gasification of Fermentation Residues

Clemens Schmittmann (), Felix Öffner and Peter Quicker
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Clemens Schmittmann: Thermoprocesses and Emission Control in Waste Management and Recycling Teaching and Research Unit, RWTH Aachen University, 52062 Aachen, Germany
Felix Öffner: LiPRO Energy GmbH & Co. KG, 26203 Wardenburg, Germany
Peter Quicker: Thermoprocesses and Emission Control in Waste Management and Recycling Teaching and Research Unit, RWTH Aachen University, 52062 Aachen, Germany

Energies, 2025, vol. 18, issue 9, 1-12

Abstract: The limited usage of fermentation residues, due to increasingly stringent legal requirements, demands novel routes of utilization for these feedstocks. To the best of our knowledge, for the first time, a mixture of fermentation residues and wood chips is used as feedstock in a fixed-bed gasifier, using only O 2 /CO 2 mixtures as gasifying agent. The maximum O 2 concentration achieved was 31.6 Vol.-%. Pronounced process stability was achieved with a cold gas efficiency of about 94%, possibly due to CO 2 conversion within the process. The heating value of the produced synthesis gas was 8.5 MJ/m 3 i.N.dry , with increased amounts of carbon monoxide and methane when compared to air-blown operations.

Keywords: gasification; synthesis gas; renewable energies; gas measurement; downdraft gasification; biomass conversion (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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