Conditioning of synthesis gases from gasification for direct use in conventional burner systems

• Demonstration of the complete process chain for the direct thermal utilization of partially methanized synthesis gas from gasification. • Characterization tests of single-stage, sub-stoichiometric methanation of syngas from allothermal steam gasification. • Results of the thermal utilization in a FLOX burner of gasification operating points with synthetic gas mixtures and real methanized gases from biomass gasification. This study demonstrates the potential of biogenic synthesis gases as a renewable alternative to natural gas for industrial process heat. The process chain integrates allothermal steam gasification using the Heatpipe Reformer, single-stage fixed-bed methanation, and direct combustion in a FLOX burner. Laboratory-scale experiments show that partial methanation increases the calorific value of the gas, doubling it, and reduces tar content to below 1 g/Nm 3 , facilitating cleaner gas utilization. FLOX burner tests with synthetic gas mixtures reveal that an increase in hydrogen content leads to higher NO x emissions, whereas a higher steam content mitigates this effectOver a continuous 72-hour operation, the burner consistently performed with syngas, maintaining stable operation. Emission measurements confirm that the system complies with regulatory limits, identifying biomass nitrogen as the primary source of NO x emissions. These results demonstrate that industrial heating processes can integrate biogenic synthesis gases without the need for an external hydrogen supply for gas conditioning.