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This paper presents the experimental results on the pollutant emission of a 2 MW thermal pilot furnace with the injection of hydrogen enriched gas (HRG) into the primary jet (coal dust and primary air). An experimental method to study the effects of this procedure on the thermal pilot furnace, which was specially designed to burn pulverized solid fuel, was conducted. The hydrogen enriched gas used in the study is dried and was produced by an electrolytic system still under patent by the authors. The primary conclusions from the results are focused on the quick diffusion of hydrogen, unlike oxygen, within the coal particles and that the hydrogen forms stable compounds with the sulfur and other elements the sterile content. A primary chemical analysis of the ash/sludge components is also presented within the paper. [ABSTRACT FROM AUTHOR]

This paper introduces a viable and economical solution for reducing the impact of fossil fuels combustion on the environment. The new proposed energy vector solid biomass-hydrogen combines the positive effect of biomass on the carbon emissions and the ones of hydrogen clean gas. The researches regarding hydrogen diffusion (pure or mixed) within biomass are part of a wider research conducted by the authors on utilization of hydrogen as active environment for combustion of solid biomass. The researches focus on the development of an innovative efficient technology for co-combustion of solid biomass with hydrogen enriched gas (HRG). The HRG is produced by an electrolytic system. The combustion of various types of solid biomass like sawdust, chopped wood, straw briquette, ropes of wine, cobs corn, and energy willow with and without HRG is analyzed. The results of thermal and environmental analyses are leading to interesting conclusions. By injecting HRG in the primary air in the co-combustion process of biomass, the flame temperature increased by 10%, the CO concentration decreased by 60–80% for specific ratio 15 L/kg, and the combustion efficiency raised by 2–4%. The results reveal the reduction by 40% of SO 2 concentration, while the NOx concentration increased by 10%. [ABSTRACT FROM AUTHOR]