Experimental Characterization of a Novel Foam Burner Design for the Low-Excess-Enthalpy Combustion of Very Lean Syngas Mixtures

Kyriakos Fotiadis (), Akrivi Asimakopoulou, Penelope Baltzopoulou, Georgia Kastrinaki, Dimitrios Koutsonikolas, George Karagiannakis, George Skevis (), Jana Richter and Fabian Mauss
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Kyriakos Fotiadis: Advanced Renewable Technologies & Environmental Materials in Integrated Systems, ARTEMIS, Chemical Process and Energy Resources Institute CPERI, Centre for Research and Technology Hellas CERTH, Thermi, 57001 Thessaloniki, Greece
Akrivi Asimakopoulou: Advanced Renewable Technologies & Environmental Materials in Integrated Systems, ARTEMIS, Chemical Process and Energy Resources Institute CPERI, Centre for Research and Technology Hellas CERTH, Thermi, 57001 Thessaloniki, Greece
Penelope Baltzopoulou: Advanced Renewable Technologies & Environmental Materials in Integrated Systems, ARTEMIS, Chemical Process and Energy Resources Institute CPERI, Centre for Research and Technology Hellas CERTH, Thermi, 57001 Thessaloniki, Greece
Georgia Kastrinaki: Advanced Renewable Technologies & Environmental Materials in Integrated Systems, ARTEMIS, Chemical Process and Energy Resources Institute CPERI, Centre for Research and Technology Hellas CERTH, Thermi, 57001 Thessaloniki, Greece
Dimitrios Koutsonikolas: Advanced Renewable Technologies & Environmental Materials in Integrated Systems, ARTEMIS, Chemical Process and Energy Resources Institute CPERI, Centre for Research and Technology Hellas CERTH, Thermi, 57001 Thessaloniki, Greece
George Karagiannakis: Advanced Renewable Technologies & Environmental Materials in Integrated Systems, ARTEMIS, Chemical Process and Energy Resources Institute CPERI, Centre for Research and Technology Hellas CERTH, Thermi, 57001 Thessaloniki, Greece
George Skevis: Advanced Renewable Technologies & Environmental Materials in Integrated Systems, ARTEMIS, Chemical Process and Energy Resources Institute CPERI, Centre for Research and Technology Hellas CERTH, Thermi, 57001 Thessaloniki, Greece
Jana Richter: Thermodynamics and Thermal Process Engineering, BTU Cottbus-Senftenberg, 03046 Cottbus, Germany
Fabian Mauss: Thermodynamics and Thermal Process Engineering, BTU Cottbus-Senftenberg, 03046 Cottbus, Germany

Energies, 2023, vol. 16, issue 19, 1-15

Abstract: In the present work, a novel foam burner design is proposed and experimentally evaluated for operation with highly diluted syngas mixtures. The lab-scale burner consists of a purpose-built, square-shaped, high-temperature-grade stainless steel tubular reactor filled with square-sectioned siliconized silico carbide (SiSiC) foams. The assembly was installed in an electrical furnace. Spatially resolved temperature measurements were obtained along the reactor axis, while simultaneous measurements of CO, CO 2 , H 2 , O 2 , and N 2 were taken at the burner exit and the water levels were recorded upstream and downstream of the reactor. The results clearly show that flames can be stabilized along the reactor for a range of foam characteristics and operating conditions. Hydrogen conversion efficiencies in excess of 98%, and overall thermal efficiencies close to 95% were achieved for the selected operating conditions. Overall, the denser 10 ppi foam demonstrated superior combustion characteristics in terms of stability, lower enthalpy rises, and a wider operating range at the expense of a very modest pressure drop penalty. Finally, scanning electron microscopy, coupled with energy dispersion spectroscopy (SEM/EDS) and Raman spectroscopy analyses, was used to determine the morphological and compositional characteristics of the pristine and aged foams. After more than 100 h of operation, no significant performance degradation was observed, even though the burner design was subjected to considerable thermal stress.

Keywords: porous burner; SiSiC; mild combustion; foam burner (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: 2023
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