Oxyfuel Conversion of Ca-rich fuel in a 60 kWth Circulating Fluidized Bed

10 Pages Posted: 15 Nov 2022

See all articles by Mais Baqain

Mais Baqain

Tallinn University of Technology (TUT)

Dmitri Neshumayev

Tallinn University of Technology (TUT)

Alar Konist

Tallinn University of Technology (TUT)

Date Written: November 14, 2022

Abstract

Carbon dioxide emissions produced from burning fossil fuels can be reduced by applying oxyfuel combustion, as one of the carbon capture methods, in circulating fluidized bed (CFB) boilers. Oxyfuel combustion for Estonia’s energy sector represents promising carbon capture option. Estonia has one of the highest carbon intensities among the European countries as the power generation is dominated by domestically produced oil shale. To assess the suitability of applying oxyfuel technology in using Ca-rich Estonian oil shale, the presented paper is aimed to investigate the influence of different inlet O2/CO2 and O2/RFG combustion modes on the used fuel. The combustion experiments were performed using a 60 kWth pilot facility under air and six different modes of inlet oxygen concentrations vol.% (21%-90%), with and without the application of recycled flue gas (RFG). Special attention was given on the produced pollutant emissions and the specific carbon emission as well. The obtained results show a total reduction in the SO2 and NOx emissions and a noticeable reduction exceeding 15% of the specific carbon factor in oxyfuel compared to air mode. In conclusion, the results outcomes indicate that oxyfuel technology is particularly suitable for oil shale combustion.

Keywords: Ca-rich fuel, oil shale, circulating fluidized bed, oxyfuel combustion, pollutant emissions

Suggested Citation

Baqain, Mais and Neshumayev, Dmitri and Konist, Alar, Oxyfuel Conversion of Ca-rich fuel in a 60 kWth Circulating Fluidized Bed (November 14, 2022). Proceedings of the 16th Greenhouse Gas Control Technologies Conference (GHGT-16) 23-24 Oct 2022, Available at SSRN: https://ssrn.com/abstract=4276982 or http://dx.doi.org/10.2139/ssrn.4276982

Mais Baqain (Contact Author)

Tallinn University of Technology (TUT) ( email )

Ehitajate tee 5
Tallinn, 12618
Estonia

Dmitri Neshumayev

Tallinn University of Technology (TUT) ( email )

Ehitajate tee 5
Tallinn, 12618
Estonia

Alar Konist

Tallinn University of Technology (TUT) ( email )

Ehitajate tee 5
Tallinn, 12618
Estonia

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