TY - JOUR
T1 - Techno-economic-environmental assessment of biomass oxy-gasification staged oxy-combustion for negative emission combined heat and power
AU - Khallaghi, Navid
AU - Jeswani, Harish
AU - Hanak, Dawid P.
AU - Manovic, Vasilije
N1 - Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/9/30
Y1 - 2021/9/30
N2 - Climate change mitigation requires developing low-carbon technologies capable of achieving CO2 emission reductions at the gigatonne scale and affordable cost. Biomass gasification, coupled with carbon capture and storage, offers a direction to atmospheric CO2 removal. To compensate for the issues associate with the high-investment requirement of CO2 removal unit and lower efficiency compared to fossil-based power cycles, this study proposed a conceptual system for combined heat and power, based on biomass oxy-gasification integrated with staged oxy-combustion combined cycle (BOXS-CC). Aspen Plus® is used to develop the process model of the proposed cycle. The results obtained in the techno-economic analysis showed that the net power efficiency of the proposed concept with 50.2 kg/s biomass flowrate was 41.6%, and the heat efficiency was 27.4%, leading to a total efficiency of 69.0%, including CO2 compression. Moreover, the economic assessment of BOXS-CC revealed that it can achieve a levelised cost of electricity of €21.4/MWh, considering the heat and carbon prices of €46.5/MWh and €40/tCO2, respectively. Such economic performance is superior compared to fossil fuel power plants without CO2 capture. The environmental assessment shows that BOX-CC system results in net negative emissions of 766 kg CO2 eq./MWhe.
AB - Climate change mitigation requires developing low-carbon technologies capable of achieving CO2 emission reductions at the gigatonne scale and affordable cost. Biomass gasification, coupled with carbon capture and storage, offers a direction to atmospheric CO2 removal. To compensate for the issues associate with the high-investment requirement of CO2 removal unit and lower efficiency compared to fossil-based power cycles, this study proposed a conceptual system for combined heat and power, based on biomass oxy-gasification integrated with staged oxy-combustion combined cycle (BOXS-CC). Aspen Plus® is used to develop the process model of the proposed cycle. The results obtained in the techno-economic analysis showed that the net power efficiency of the proposed concept with 50.2 kg/s biomass flowrate was 41.6%, and the heat efficiency was 27.4%, leading to a total efficiency of 69.0%, including CO2 compression. Moreover, the economic assessment of BOXS-CC revealed that it can achieve a levelised cost of electricity of €21.4/MWh, considering the heat and carbon prices of €46.5/MWh and €40/tCO2, respectively. Such economic performance is superior compared to fossil fuel power plants without CO2 capture. The environmental assessment shows that BOX-CC system results in net negative emissions of 766 kg CO2 eq./MWhe.
UR - http://www.scopus.com/inward/record.url?scp=85108867662&partnerID=8YFLogxK
U2 - 10.1016/j.applthermaleng.2021.117254
DO - 10.1016/j.applthermaleng.2021.117254
M3 - Article
AN - SCOPUS:85108867662
SN - 1359-4311
VL - 196
JO - Applied Thermal Engineering
JF - Applied Thermal Engineering
M1 - 117254
ER -