Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6680799 | Applied Energy | 2018 | 9 Pages |
Abstract
The objective of this work is to determine the nitrogen oxide emission in the flue gas of a catalytic hydrogen combustion process, operating without premixed hydrogen and air supply. The study was investigated on a novel designed gas under glass stove top burner, suitable for domestic kitchen applications. The basic catalytic burner assembly consists of two platinum coated silicon carbide (SiC) foam disks with a diameter of 150â¯mm, a thickness of 10â¯mm and a porosity of 60 and 80 pores per inch (ppi) respectively. The two catalytic SiC disks are stacked with 10â¯mm space between for a uniform air feeding and distribution. Hydrogen is supplied from below the assembly and air is blown in between the two Pt coated catalytic SiC disks, leading to a homogeneous air distribution and thus a uniform catalytic reaction of hydrogen and air. Tests are performed at hydrogen flow rates of 5, 10 and 15 Nl/min, equivalent to 0.9, 1.8, 2.7â¯kW power, the hydrogen to oxygen ratios (Ï) were fixed to 0.66, 0.5 and 0.33 respectively. Ultra-low nitrogen oxide emissions of 0.09 ppmv to 9.49 ppmv, equivalent to 0.007 to 0.37â¯mg/kWh are achieved with this novel developed catalytic combustion design. These values are significantly lower than the present EU regulation of 56â¯mg/kWh for combustion processes of gaseous fuels for heating applications. This result shows the very high potential of converting hydrogen to heat without harmful exhaust gases for a broad domestic application in decarbonised gas grids or stationary power to gas applications.
Related Topics
Physical Sciences and Engineering
Energy
Energy Engineering and Power Technology
Authors
B. Fumey, T. Buetler, U.F. Vogt,