Analysis of operational characteristics of biomass oxygen fuel circulating fluidized bed combustor with indirect supercritical carbon dioxide cycle

• Published in: Energy conversion and management Vol. 259; p. 115569
• Main Authors: Ling, J.L.J., Kim, H.W., Go, E.S., Oh, S.S., Park, H.J., Jeong, C.S., Lee, S.H.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.05.2022; Elsevier Science Ltd
• Subjects: Animal wastes; Biomass; Biomass burning; Carbon cycle; Carbon dioxide; Carbon dioxide emissions; Cattle manure; Circulating fluidized bed combustion; Coal; Combustion; Combustion chambers; Compression; Cycle ratio; Efficiency; Excess O2 ratio; Flue gas recirculation; Fluidized bed combustion; Fluidized beds; Fuels; Hardwoods; Household wastes; Manures; Net efficiency; Oxy-fuel combustion; Oxygen; Power efficiency; Supercritical carbon dioxide cycle; Waste paper; Supercritical carbon dioxide cycle; Circulating fluidized bed combustion; Net efficiency; Flue gas recirculation; Biomass; Oxy-fuel combustion; Excess O2 ratio
• ISSN: 0196-8904; 1879-2227
• DOI: 10.1016/j.enconman.2022.115569

•Biomass oxygen fuel combustion is a potential technology for carbon neutrality.•Supercritical carbon dioxide integrated circulating fluidized bed combustor was modelled.•Excess oxygen ratio affected the energy penalty of compression and purification unit.•Waste paper resulted in highest efficiency of 35.76%•Excess impurities reduced carbon dioxide storage capacity and purification effect. Biomass have serve as a sustainable fuel source to mitigate environmental concerns in power generation. Developments in advanced coal combustion technologies have presented several promising solutions probable to be integrated with biomass combustion. Indirect supercritical carbon dioxide cycle incorporated with oxygen fuel circulating fluidized bed combustor was proposed to improve the power efficiency for domestic waste biomass resources, such as waste paper, waste wood, and cow manure. The thermodynamic analysis of the proposed cycle was analysed using Aspen Plus software within the excess oxygen ratio ranged between 0.97 and 1.05 and compared with coal fuelled supercritical carbon dioxide cycle. As excess oxygen ratio reached 1.01, with approximation of 27% of inlet oxygen concentrations, energy penalty by the compression and purification unit was minimized. The maximum net efficiency was 35.76% for waste paper, 27.74% for waste wood, and 31.12% for cow manure. The stored carbon dioxide at the same excess oxygen ratio for waste wood, waste paper and cow manure was 92.60%, 92.33% and 90.91% respectively. The proposed power cycle fuelled with waste paper resulted in a net efficiency slightly lower than coal fuelled power cycle. This work highlighted the potential of proposed biomass oxygen fuel circulating fluidized bed combustor integrated supercritical carbon dioxide cycle to serve as a future power technology for negative carbon dioxide emission.