The motivation for this work was to define the reburning potential of sewage sludge (SS) gasification gas (syngas). A numerical simulation of the co-combustion process of syngas in a hard coal-fired boiler was made. All calculations were performed using the Chemkin program and a plug-flow reactor model was used. The calculations were modelled using the GRI-Mech 3.0 mechanism. The highest conversions for nitric oxide (NO) were obtained at temperatures of approximately 1000 K to 1200 K. The highest reduction efficiency was achieved when the molar flow-ratio of the syngas was 15 %. The combustion of hard coal with sewage sludge-derived syngas reduces NO emissions and the amount of coal needed to produce electricity and heat. Furthermore, advanced reburning, a more complex process, achieved an efficiency of up to 80 %. Calculations show that the syngas thus analysed can provide better results.

A reburning process using sewage sludge-derived syngas

Modeling of Soot Formation in Gas Burner Using Reduced Chemical Kinetics Coupled with CFD Code

Comments on the magnetohydrodynamic flow measurements in oxyhydrogen detonations of fells and norman

The authors show that the mass velocity profile in a detonation wave can be measured with electrode geometry, and they discuss the conditions necessary for the simultaneous measurement of mass velocity and electrical conductivity. A diagram illustrates the experimental scheme for measuring these values in stainless steel tubes equipped with differentiating magnetic sensors. Charts present data on dimensionless mass velocity profiles and pressure profiles behind detonation fronts in gases.

P.W. Norman

Papers

A study of the gas flow occurring in oxyhydrogen detonations, using a magnetohydrodynamic method of measurement