Detailed experimental investigation of the spatially distributed gas release and bed temperatures in fixed-bed biomass combustion with low oxygen concentration

Archan, Georg; Anca-Couce, Andrés; Gregorc, Jurij; Buchmayr, Markus; Hochenauer, Christoph; Gruber, Johann; Scharler, Robert

doi:10.1016/j.biombioe.2020.105725

Cited by 16 publications

(2 citation statements)

References 21 publications

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“…For further reducing the emissions and increase feedstock flexibility in small scales, enhanced air staging technologies are being developed in recent years, with lower λ in the fuel bed to reduce PM emissions and ash-related problems as well as improvements in the reduction zone for achieving lower NOX emissions [47][48] [49][50] [51].…”

Section: Bioheat Production Technologies and Emissionsmentioning

confidence: 99%

Bioenergy technologies, uses, market and future trends with Austria as a case study

Anca-Couce

Hochenauer

Scharler

2021

Renewable and Sustainable Energy Reviews

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Section: Bioheat Production Technologies and Emissionsmentioning

confidence: 99%

Bioenergy technologies, uses, market and future trends with Austria as a case study

Anca-Couce

Hochenauer

Scharler

2021

Renewable and Sustainable Energy Reviews

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“…Many recent works analyzed primary measures for NO x reduction. Air staging and flue gas recirculation are some of the possible solutions, which proved to be effective also in the reduction of other pollutants (see, for instance, the recent papers by Archan and co-workers [27,28]). The recirculation of flue gas (FGR) is a technique of combustion optimization based on mixing combustion air with a fraction of flue gases to reduce the amount of O 2 in the combustive agents below 21% of O 2 .…”

Section: Introductionmentioning

confidence: 99%

The Effect of Flue Gas Recirculation on CO, PM and NOx Emissions in Pellet Stove Combustion

Polonini

Petrocelli²,

Lezzi

2023

Energies

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Pellet stoves are popular appliances because they are an affordable technology and because the fuel is easy to store and to use. The increasing concern for environmental issues, however, requires a continuous effort to reduce pollutant levels in the atmosphere. This experimental work focuses on flue gas recirculation (FGR) as a possible way to improve combustion and decrease the emissions of carbon monoxide CO, particulate matter PM, and nitrogen oxides NOx in order to fulfill European and Italian emission requirements, for NOx in particular. A pellet stove has been tested in several experimental sessions with and without FGR. Pollutant emissions have been measured and analyzed in terms of statistical summaries and instantaneous trends. With FGR, the average CO and PM emissions were found to be 80% and 45% lower than the corresponding emissions without FGR. Results for PM are significant since FGR reduces emissions well below the most restrictive limits enforced in Italy. The analysis of instantaneous emissions in relation to excess air indicated that FGR can considerably reduce emissions, especially at the extremities of the oxygen O2 content range. Optimal ranges of excess air, in terms of O2 in flue gas, were identified for both the tested configurations, in which CO and PM emissions are minimized. The optimal range is 8–9% without FGR, and it decreases to 5–7% with FGR. Finally, a reduction in NOx emissions by about 11% has been observed in the configuration with FGR. Although this reduction seems modest as compared to CO and PM, it is important in that it lowers the emission level to the most severe limit in Italian regulations and indicates an improved FGR system as the solution for further reduction.

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Biomass—Combustion

Scharler,

Hochenauer,

Anca-Couce

2025

Small Scale Power Generation Handbook

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Detailed experimental investigation of the spatially distributed gas release and bed temperatures in fixed-bed biomass combustion with low oxygen concentration

Cited by 16 publications

References 21 publications

Bioenergy technologies, uses, market and future trends with Austria as a case study

Bioenergy technologies, uses, market and future trends with Austria as a case study

The Effect of Flue Gas Recirculation on CO, PM and NOx Emissions in Pellet Stove Combustion

Biomass—Combustion

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